diff --git a/doc/go1.html b/doc/go1.html index e1afe479ae6..f0a804784a0 100644 --- a/doc/go1.html +++ b/doc/go1.html @@ -618,8 +618,6 @@ The packages in their new locations are:

@@ -639,6 +637,8 @@ Go 1 deletes several packages outright:

  • container/vector
  • exp/datafmt
  • go/typechecker
    • +
  • old/regexp
    • +
  • old/template
  • try
    • diff --git a/src/pkg/old/regexp/all_test.go b/src/pkg/old/regexp/all_test.go deleted file mode 100644 index 180dac4d455..00000000000 --- a/src/pkg/old/regexp/all_test.go +++ /dev/null @@ -1,421 +0,0 @@ -// Copyright 2009 The Go Authors. All rights reserved. -// Use of this source code is governed by a BSD-style -// license that can be found in the LICENSE file. - -package regexp - -import ( - "strings" - "testing" -) - -var good_re = []string{ - ``, - `.`, - `^.$`, - `a`, - `a*`, - `a+`, - `a?`, - `a|b`, - `a*|b*`, - `(a*|b)(c*|d)`, - `[a-z]`, - `[a-abc-c\-\]\[]`, - `[a-z]+`, - `[]`, - `[abc]`, - `[^1234]`, - `[^\n]`, - `\!\\`, -} - -type stringError struct { - re string - err error -} - -var bad_re = []stringError{ - {`*`, ErrBareClosure}, - {`+`, ErrBareClosure}, - {`?`, ErrBareClosure}, - {`(abc`, ErrUnmatchedLpar}, - {`abc)`, ErrUnmatchedRpar}, - {`x[a-z`, ErrUnmatchedLbkt}, - {`abc]`, ErrUnmatchedRbkt}, - {`[z-a]`, ErrBadRange}, - {`abc\`, ErrExtraneousBackslash}, - {`a**`, ErrBadClosure}, - {`a*+`, ErrBadClosure}, - {`a??`, ErrBadClosure}, - {`\x`, ErrBadBackslash}, -} - -func compileTest(t *testing.T, expr string, error error) *Regexp { - re, err := Compile(expr) - if err != error { - t.Error("compiling `", expr, "`; unexpected error: ", err.Error()) - } - return re -} - -func TestGoodCompile(t *testing.T) { - for i := 0; i < len(good_re); i++ { - compileTest(t, good_re[i], nil) - } -} - -func TestBadCompile(t *testing.T) { - for i := 0; i < len(bad_re); i++ { - compileTest(t, bad_re[i].re, bad_re[i].err) - } -} - -func matchTest(t *testing.T, test *FindTest) { - re := compileTest(t, test.pat, nil) - if re == nil { - return - } - m := re.MatchString(test.text) - if m != (len(test.matches) > 0) { - t.Errorf("MatchString failure on %s: %t should be %t", test, m, len(test.matches) > 0) - } - // now try bytes - m = re.Match([]byte(test.text)) - if m != (len(test.matches) > 0) { - t.Errorf("Match failure on %s: %t should be %t", test, m, len(test.matches) > 0) - } -} - -func TestMatch(t *testing.T) { - for _, test := range findTests { - matchTest(t, &test) - } -} - -func matchFunctionTest(t *testing.T, test *FindTest) { - m, err := MatchString(test.pat, test.text) - if err == nil { - return - } - if m != (len(test.matches) > 0) { - t.Errorf("Match failure on %s: %t should be %t", test, m, len(test.matches) > 0) - } -} - -func TestMatchFunction(t *testing.T) { - for _, test := range findTests { - matchFunctionTest(t, &test) - } -} - -type ReplaceTest struct { - pattern, replacement, input, output string -} - -var replaceTests = []ReplaceTest{ - // Test empty input and/or replacement, with pattern that matches the empty string. - {"", "", "", ""}, - {"", "x", "", "x"}, - {"", "", "abc", "abc"}, - {"", "x", "abc", "xaxbxcx"}, - - // Test empty input and/or replacement, with pattern that does not match the empty string. - {"b", "", "", ""}, - {"b", "x", "", ""}, - {"b", "", "abc", "ac"}, - {"b", "x", "abc", "axc"}, - {"y", "", "", ""}, - {"y", "x", "", ""}, - {"y", "", "abc", "abc"}, - {"y", "x", "abc", "abc"}, - - // Multibyte characters -- verify that we don't try to match in the middle - // of a character. - {"[a-c]*", "x", "\u65e5", "x\u65e5x"}, - {"[^\u65e5]", "x", "abc\u65e5def", "xxx\u65e5xxx"}, - - // Start and end of a string. - {"^[a-c]*", "x", "abcdabc", "xdabc"}, - {"[a-c]*$", "x", "abcdabc", "abcdx"}, - {"^[a-c]*$", "x", "abcdabc", "abcdabc"}, - {"^[a-c]*", "x", "abc", "x"}, - {"[a-c]*$", "x", "abc", "x"}, - {"^[a-c]*$", "x", "abc", "x"}, - {"^[a-c]*", "x", "dabce", "xdabce"}, - {"[a-c]*$", "x", "dabce", "dabcex"}, - {"^[a-c]*$", "x", "dabce", "dabce"}, - {"^[a-c]*", "x", "", "x"}, - {"[a-c]*$", "x", "", "x"}, - {"^[a-c]*$", "x", "", "x"}, - - {"^[a-c]+", "x", "abcdabc", "xdabc"}, - {"[a-c]+$", "x", "abcdabc", "abcdx"}, - {"^[a-c]+$", "x", "abcdabc", "abcdabc"}, - {"^[a-c]+", "x", "abc", "x"}, - {"[a-c]+$", "x", "abc", "x"}, - {"^[a-c]+$", "x", "abc", "x"}, - {"^[a-c]+", "x", "dabce", "dabce"}, - {"[a-c]+$", "x", "dabce", "dabce"}, - {"^[a-c]+$", "x", "dabce", "dabce"}, - {"^[a-c]+", "x", "", ""}, - {"[a-c]+$", "x", "", ""}, - {"^[a-c]+$", "x", "", ""}, - - // Other cases. - {"abc", "def", "abcdefg", "defdefg"}, - {"bc", "BC", "abcbcdcdedef", "aBCBCdcdedef"}, - {"abc", "", "abcdabc", "d"}, - {"x", "xXx", "xxxXxxx", "xXxxXxxXxXxXxxXxxXx"}, - {"abc", "d", "", ""}, - {"abc", "d", "abc", "d"}, - {".+", "x", "abc", "x"}, - {"[a-c]*", "x", "def", "xdxexfx"}, - {"[a-c]+", "x", "abcbcdcdedef", "xdxdedef"}, - {"[a-c]*", "x", "abcbcdcdedef", "xdxdxexdxexfx"}, -} - -type ReplaceFuncTest struct { - pattern string - replacement func(string) string - input, output string -} - -var replaceFuncTests = []ReplaceFuncTest{ - {"[a-c]", func(s string) string { return "x" + s + "y" }, "defabcdef", "defxayxbyxcydef"}, - {"[a-c]+", func(s string) string { return "x" + s + "y" }, "defabcdef", "defxabcydef"}, - {"[a-c]*", func(s string) string { return "x" + s + "y" }, "defabcdef", "xydxyexyfxabcydxyexyfxy"}, -} - -func TestReplaceAll(t *testing.T) { - for _, tc := range replaceTests { - re, err := Compile(tc.pattern) - if err != nil { - t.Errorf("Unexpected error compiling %q: %v", tc.pattern, err) - continue - } - actual := re.ReplaceAllString(tc.input, tc.replacement) - if actual != tc.output { - t.Errorf("%q.Replace(%q,%q) = %q; want %q", - tc.pattern, tc.input, tc.replacement, actual, tc.output) - } - // now try bytes - actual = string(re.ReplaceAll([]byte(tc.input), []byte(tc.replacement))) - if actual != tc.output { - t.Errorf("%q.Replace(%q,%q) = %q; want %q", - tc.pattern, tc.input, tc.replacement, actual, tc.output) - } - } -} - -func TestReplaceAllFunc(t *testing.T) { - for _, tc := range replaceFuncTests { - re, err := Compile(tc.pattern) - if err != nil { - t.Errorf("Unexpected error compiling %q: %v", tc.pattern, err) - continue - } - actual := re.ReplaceAllStringFunc(tc.input, tc.replacement) - if actual != tc.output { - t.Errorf("%q.ReplaceFunc(%q,%q) = %q; want %q", - tc.pattern, tc.input, tc.replacement, actual, tc.output) - } - // now try bytes - actual = string(re.ReplaceAllFunc([]byte(tc.input), func(s []byte) []byte { return []byte(tc.replacement(string(s))) })) - if actual != tc.output { - t.Errorf("%q.ReplaceFunc(%q,%q) = %q; want %q", - tc.pattern, tc.input, tc.replacement, actual, tc.output) - } - } -} - -type MetaTest struct { - pattern, output, literal string - isLiteral bool -} - -var metaTests = []MetaTest{ - {``, ``, ``, true}, - {`foo`, `foo`, `foo`, true}, - {`foo\.\$`, `foo\\\.\\\$`, `foo.$`, true}, // has meta but no operator - {`foo.\$`, `foo\.\\\$`, `foo`, false}, // has escaped operators and real operators - {`!@#$%^&*()_+-=[{]}\|,<.>/?~`, `!@#\$%\^&\*\(\)_\+-=\[{\]}\\\|,<\.>/\?~`, `!@#`, false}, -} - -func TestQuoteMeta(t *testing.T) { - for _, tc := range metaTests { - // Verify that QuoteMeta returns the expected string. - quoted := QuoteMeta(tc.pattern) - if quoted != tc.output { - t.Errorf("QuoteMeta(`%s`) = `%s`; want `%s`", - tc.pattern, quoted, tc.output) - continue - } - - // Verify that the quoted string is in fact treated as expected - // by Compile -- i.e. that it matches the original, unquoted string. - if tc.pattern != "" { - re, err := Compile(quoted) - if err != nil { - t.Errorf("Unexpected error compiling QuoteMeta(`%s`): %v", tc.pattern, err) - continue - } - src := "abc" + tc.pattern + "def" - repl := "xyz" - replaced := re.ReplaceAllString(src, repl) - expected := "abcxyzdef" - if replaced != expected { - t.Errorf("QuoteMeta(`%s`).Replace(`%s`,`%s`) = `%s`; want `%s`", - tc.pattern, src, repl, replaced, expected) - } - } - } -} - -func TestLiteralPrefix(t *testing.T) { - for _, tc := range metaTests { - // Literal method needs to scan the pattern. - re := MustCompile(tc.pattern) - str, complete := re.LiteralPrefix() - if complete != tc.isLiteral { - t.Errorf("LiteralPrefix(`%s`) = %t; want %t", tc.pattern, complete, tc.isLiteral) - } - if str != tc.literal { - t.Errorf("LiteralPrefix(`%s`) = `%s`; want `%s`", tc.pattern, str, tc.literal) - } - } -} - -type numSubexpCase struct { - input string - expected int -} - -var numSubexpCases = []numSubexpCase{ - {``, 0}, - {`.*`, 0}, - {`abba`, 0}, - {`ab(b)a`, 1}, - {`ab(.*)a`, 1}, - {`(.*)ab(.*)a`, 2}, - {`(.*)(ab)(.*)a`, 3}, - {`(.*)((a)b)(.*)a`, 4}, - {`(.*)(\(ab)(.*)a`, 3}, - {`(.*)(\(a\)b)(.*)a`, 3}, -} - -func TestNumSubexp(t *testing.T) { - for _, c := range numSubexpCases { - re := MustCompile(c.input) - n := re.NumSubexp() - if n != c.expected { - t.Errorf("NumSubexp for %q returned %d, expected %d", c.input, n, c.expected) - } - } -} - -func BenchmarkLiteral(b *testing.B) { - x := strings.Repeat("x", 50) + "y" - b.StopTimer() - re := MustCompile("y") - b.StartTimer() - for i := 0; i < b.N; i++ { - if !re.MatchString(x) { - b.Fatal("no match!") - } - } -} - -func BenchmarkNotLiteral(b *testing.B) { - x := strings.Repeat("x", 50) + "y" - b.StopTimer() - re := MustCompile(".y") - b.StartTimer() - for i := 0; i < b.N; i++ { - if !re.MatchString(x) { - b.Fatal("no match!") - } - } -} - -func BenchmarkMatchClass(b *testing.B) { - b.StopTimer() - x := strings.Repeat("xxxx", 20) + "w" - re := MustCompile("[abcdw]") - b.StartTimer() - for i := 0; i < b.N; i++ { - if !re.MatchString(x) { - b.Fatal("no match!") - } - } -} - -func BenchmarkMatchClass_InRange(b *testing.B) { - b.StopTimer() - // 'b' is between 'a' and 'c', so the charclass - // range checking is no help here. - x := strings.Repeat("bbbb", 20) + "c" - re := MustCompile("[ac]") - b.StartTimer() - for i := 0; i < b.N; i++ { - if !re.MatchString(x) { - b.Fatal("no match!") - } - } -} - -func BenchmarkReplaceAll(b *testing.B) { - x := "abcdefghijklmnopqrstuvwxyz" - b.StopTimer() - re := MustCompile("[cjrw]") - b.StartTimer() - for i := 0; i < b.N; i++ { - re.ReplaceAllString(x, "") - } -} - -func BenchmarkAnchoredLiteralShortNonMatch(b *testing.B) { - b.StopTimer() - x := []byte("abcdefghijklmnopqrstuvwxyz") - re := MustCompile("^zbc(d|e)") - b.StartTimer() - for i := 0; i < b.N; i++ { - re.Match(x) - } -} - -func BenchmarkAnchoredLiteralLongNonMatch(b *testing.B) { - b.StopTimer() - x := []byte("abcdefghijklmnopqrstuvwxyz") - for i := 0; i < 15; i++ { - x = append(x, x...) - } - re := MustCompile("^zbc(d|e)") - b.StartTimer() - for i := 0; i < b.N; i++ { - re.Match(x) - } -} - -func BenchmarkAnchoredShortMatch(b *testing.B) { - b.StopTimer() - x := []byte("abcdefghijklmnopqrstuvwxyz") - re := MustCompile("^.bc(d|e)") - b.StartTimer() - for i := 0; i < b.N; i++ { - re.Match(x) - } -} - -func BenchmarkAnchoredLongMatch(b *testing.B) { - b.StopTimer() - x := []byte("abcdefghijklmnopqrstuvwxyz") - for i := 0; i < 15; i++ { - x = append(x, x...) - } - re := MustCompile("^.bc(d|e)") - b.StartTimer() - for i := 0; i < b.N; i++ { - re.Match(x) - } -} diff --git a/src/pkg/old/regexp/find_test.go b/src/pkg/old/regexp/find_test.go deleted file mode 100644 index 83b249e3cef..00000000000 --- a/src/pkg/old/regexp/find_test.go +++ /dev/null @@ -1,472 +0,0 @@ -// Copyright 2010 The Go Authors. All rights reserved. -// Use of this source code is governed by a BSD-style -// license that can be found in the LICENSE file. - -package regexp - -import ( - "fmt" - "strings" - "testing" -) - -// For each pattern/text pair, what is the expected output of each function? -// We can derive the textual results from the indexed results, the non-submatch -// results from the submatched results, the single results from the 'all' results, -// and the byte results from the string results. Therefore the table includes -// only the FindAllStringSubmatchIndex result. -type FindTest struct { - pat string - text string - matches [][]int -} - -func (t FindTest) String() string { - return fmt.Sprintf("pat: %#q text: %#q", t.pat, t.text) -} - -var findTests = []FindTest{ - {``, ``, build(1, 0, 0)}, - {`^abcdefg`, "abcdefg", build(1, 0, 7)}, - {`a+`, "baaab", build(1, 1, 4)}, - {"abcd..", "abcdef", build(1, 0, 6)}, - {`a`, "a", build(1, 0, 1)}, - {`x`, "y", nil}, - {`b`, "abc", build(1, 1, 2)}, - {`.`, "a", build(1, 0, 1)}, - {`.*`, "abcdef", build(1, 0, 6)}, - {`^`, "abcde", build(1, 0, 0)}, - {`$`, "abcde", build(1, 5, 5)}, - {`^abcd$`, "abcd", build(1, 0, 4)}, - {`^bcd'`, "abcdef", nil}, - {`^abcd$`, "abcde", nil}, - {`a+`, "baaab", build(1, 1, 4)}, - {`a*`, "baaab", build(3, 0, 0, 1, 4, 5, 5)}, - {`[a-z]+`, "abcd", build(1, 0, 4)}, - {`[^a-z]+`, "ab1234cd", build(1, 2, 6)}, - {`[a\-\]z]+`, "az]-bcz", build(2, 0, 4, 6, 7)}, - {`[^\n]+`, "abcd\n", build(1, 0, 4)}, - {`[日本語]+`, "日本語日本語", build(1, 0, 18)}, - {`日本語+`, "日本語", build(1, 0, 9)}, - {`日本語+`, "日本語語語語", build(1, 0, 18)}, - {`()`, "", build(1, 0, 0, 0, 0)}, - {`(a)`, "a", build(1, 0, 1, 0, 1)}, - {`(.)(.)`, "日a", build(1, 0, 4, 0, 3, 3, 4)}, - {`(.*)`, "", build(1, 0, 0, 0, 0)}, - {`(.*)`, "abcd", build(1, 0, 4, 0, 4)}, - {`(..)(..)`, "abcd", build(1, 0, 4, 0, 2, 2, 4)}, - {`(([^xyz]*)(d))`, "abcd", build(1, 0, 4, 0, 4, 0, 3, 3, 4)}, - {`((a|b|c)*(d))`, "abcd", build(1, 0, 4, 0, 4, 2, 3, 3, 4)}, - {`(((a|b|c)*)(d))`, "abcd", build(1, 0, 4, 0, 4, 0, 3, 2, 3, 3, 4)}, - {`\a\b\f\n\r\t\v`, "\a\b\f\n\r\t\v", build(1, 0, 7)}, - {`[\a\b\f\n\r\t\v]+`, "\a\b\f\n\r\t\v", build(1, 0, 7)}, - - {`a*(|(b))c*`, "aacc", build(1, 0, 4, 2, 2, -1, -1)}, - {`(.*).*`, "ab", build(1, 0, 2, 0, 2)}, - {`[.]`, ".", build(1, 0, 1)}, - {`/$`, "/abc/", build(1, 4, 5)}, - {`/$`, "/abc", nil}, - - // multiple matches - {`.`, "abc", build(3, 0, 1, 1, 2, 2, 3)}, - {`(.)`, "abc", build(3, 0, 1, 0, 1, 1, 2, 1, 2, 2, 3, 2, 3)}, - {`.(.)`, "abcd", build(2, 0, 2, 1, 2, 2, 4, 3, 4)}, - {`ab*`, "abbaab", build(3, 0, 3, 3, 4, 4, 6)}, - {`a(b*)`, "abbaab", build(3, 0, 3, 1, 3, 3, 4, 4, 4, 4, 6, 5, 6)}, - - // fixed bugs - {`ab$`, "cab", build(1, 1, 3)}, - {`axxb$`, "axxcb", nil}, - {`data`, "daXY data", build(1, 5, 9)}, - {`da(.)a$`, "daXY data", build(1, 5, 9, 7, 8)}, - {`zx+`, "zzx", build(1, 1, 3)}, - - // can backslash-escape any punctuation - {`\!\"\#\$\%\&\'\(\)\*\+\,\-\.\/\:\;\<\=\>\?\@\[\\\]\^\_\{\|\}\~`, - `!"#$%&'()*+,-./:;<=>?@[\]^_{|}~`, build(1, 0, 31)}, - {`[\!\"\#\$\%\&\'\(\)\*\+\,\-\.\/\:\;\<\=\>\?\@\[\\\]\^\_\{\|\}\~]+`, - `!"#$%&'()*+,-./:;<=>?@[\]^_{|}~`, build(1, 0, 31)}, - {"\\`", "`", build(1, 0, 1)}, - {"[\\`]+", "`", build(1, 0, 1)}, - - // long set of matches (longer than startSize) - { - ".", - "qwertyuiopasdfghjklzxcvbnm1234567890", - build(36, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 9, 9, 10, - 10, 11, 11, 12, 12, 13, 13, 14, 14, 15, 15, 16, 16, 17, 17, 18, 18, 19, 19, 20, - 20, 21, 21, 22, 22, 23, 23, 24, 24, 25, 25, 26, 26, 27, 27, 28, 28, 29, 29, 30, - 30, 31, 31, 32, 32, 33, 33, 34, 34, 35, 35, 36), - }, -} - -// build is a helper to construct a [][]int by extracting n sequences from x. -// This represents n matches with len(x)/n submatches each. -func build(n int, x ...int) [][]int { - ret := make([][]int, n) - runLength := len(x) / n - j := 0 - for i := range ret { - ret[i] = make([]int, runLength) - copy(ret[i], x[j:]) - j += runLength - if j > len(x) { - panic("invalid build entry") - } - } - return ret -} - -// First the simple cases. - -func TestFind(t *testing.T) { - for _, test := range findTests { - re := MustCompile(test.pat) - if re.String() != test.pat { - t.Errorf("String() = `%s`; should be `%s`", re.String(), test.pat) - } - result := re.Find([]byte(test.text)) - switch { - case len(test.matches) == 0 && len(result) == 0: - // ok - case test.matches == nil && result != nil: - t.Errorf("expected no match; got one: %s", test) - case test.matches != nil && result == nil: - t.Errorf("expected match; got none: %s", test) - case test.matches != nil && result != nil: - expect := test.text[test.matches[0][0]:test.matches[0][1]] - if expect != string(result) { - t.Errorf("expected %q got %q: %s", expect, result, test) - } - } - } -} - -func TestFindString(t *testing.T) { - for _, test := range findTests { - result := MustCompile(test.pat).FindString(test.text) - switch { - case len(test.matches) == 0 && len(result) == 0: - // ok - case test.matches == nil && result != "": - t.Errorf("expected no match; got one: %s", test) - case test.matches != nil && result == "": - // Tricky because an empty result has two meanings: no match or empty match. - if test.matches[0][0] != test.matches[0][1] { - t.Errorf("expected match; got none: %s", test) - } - case test.matches != nil && result != "": - expect := test.text[test.matches[0][0]:test.matches[0][1]] - if expect != result { - t.Errorf("expected %q got %q: %s", expect, result, test) - } - } - } -} - -func testFindIndex(test *FindTest, result []int, t *testing.T) { - switch { - case len(test.matches) == 0 && len(result) == 0: - // ok - case test.matches == nil && result != nil: - t.Errorf("expected no match; got one: %s", test) - case test.matches != nil && result == nil: - t.Errorf("expected match; got none: %s", test) - case test.matches != nil && result != nil: - expect := test.matches[0] - if expect[0] != result[0] || expect[1] != result[1] { - t.Errorf("expected %v got %v: %s", expect, result, test) - } - } -} - -func TestFindIndex(t *testing.T) { - for _, test := range findTests { - testFindIndex(&test, MustCompile(test.pat).FindIndex([]byte(test.text)), t) - } -} - -func TestFindStringIndex(t *testing.T) { - for _, test := range findTests { - testFindIndex(&test, MustCompile(test.pat).FindStringIndex(test.text), t) - } -} - -func TestFindReaderIndex(t *testing.T) { - for _, test := range findTests { - testFindIndex(&test, MustCompile(test.pat).FindReaderIndex(strings.NewReader(test.text)), t) - } -} - -// Now come the simple All cases. - -func TestFindAll(t *testing.T) { - for _, test := range findTests { - result := MustCompile(test.pat).FindAll([]byte(test.text), -1) - switch { - case test.matches == nil && result == nil: - // ok - case test.matches == nil && result != nil: - t.Errorf("expected no match; got one: %s", test) - case test.matches != nil && result == nil: - t.Errorf("expected match; got none: %s", test) - case test.matches != nil && result != nil: - if len(test.matches) != len(result) { - t.Errorf("expected %d matches; got %d: %s", len(test.matches), len(result), test) - continue - } - for k, e := range test.matches { - expect := test.text[e[0]:e[1]] - if expect != string(result[k]) { - t.Errorf("match %d: expected %q got %q: %s", k, expect, result[k], test) - } - } - } - } -} - -func TestFindAllString(t *testing.T) { - for _, test := range findTests { - result := MustCompile(test.pat).FindAllString(test.text, -1) - switch { - case test.matches == nil && result == nil: - // ok - case test.matches == nil && result != nil: - t.Errorf("expected no match; got one: %s", test) - case test.matches != nil && result == nil: - t.Errorf("expected match; got none: %s", test) - case test.matches != nil && result != nil: - if len(test.matches) != len(result) { - t.Errorf("expected %d matches; got %d: %s", len(test.matches), len(result), test) - continue - } - for k, e := range test.matches { - expect := test.text[e[0]:e[1]] - if expect != result[k] { - t.Errorf("expected %q got %q: %s", expect, result, test) - } - } - } - } -} - -func testFindAllIndex(test *FindTest, result [][]int, t *testing.T) { - switch { - case test.matches == nil && result == nil: - // ok - case test.matches == nil && result != nil: - t.Errorf("expected no match; got one: %s", test) - case test.matches != nil && result == nil: - t.Errorf("expected match; got none: %s", test) - case test.matches != nil && result != nil: - if len(test.matches) != len(result) { - t.Errorf("expected %d matches; got %d: %s", len(test.matches), len(result), test) - return - } - for k, e := range test.matches { - if e[0] != result[k][0] || e[1] != result[k][1] { - t.Errorf("match %d: expected %v got %v: %s", k, e, result[k], test) - } - } - } -} - -func TestFindAllIndex(t *testing.T) { - for _, test := range findTests { - testFindAllIndex(&test, MustCompile(test.pat).FindAllIndex([]byte(test.text), -1), t) - } -} - -func TestFindAllStringIndex(t *testing.T) { - for _, test := range findTests { - testFindAllIndex(&test, MustCompile(test.pat).FindAllStringIndex(test.text, -1), t) - } -} - -// Now come the Submatch cases. - -func testSubmatchBytes(test *FindTest, n int, submatches []int, result [][]byte, t *testing.T) { - if len(submatches) != len(result)*2 { - t.Errorf("match %d: expected %d submatches; got %d: %s", n, len(submatches)/2, len(result), test) - return - } - for k := 0; k < len(submatches); k += 2 { - if submatches[k] == -1 { - if result[k/2] != nil { - t.Errorf("match %d: expected nil got %q: %s", n, result, test) - } - continue - } - expect := test.text[submatches[k]:submatches[k+1]] - if expect != string(result[k/2]) { - t.Errorf("match %d: expected %q got %q: %s", n, expect, result, test) - return - } - } -} - -func TestFindSubmatch(t *testing.T) { - for _, test := range findTests { - result := MustCompile(test.pat).FindSubmatch([]byte(test.text)) - switch { - case test.matches == nil && result == nil: - // ok - case test.matches == nil && result != nil: - t.Errorf("expected no match; got one: %s", test) - case test.matches != nil && result == nil: - t.Errorf("expected match; got none: %s", test) - case test.matches != nil && result != nil: - testSubmatchBytes(&test, 0, test.matches[0], result, t) - } - } -} - -func testSubmatchString(test *FindTest, n int, submatches []int, result []string, t *testing.T) { - if len(submatches) != len(result)*2 { - t.Errorf("match %d: expected %d submatches; got %d: %s", n, len(submatches)/2, len(result), test) - return - } - for k := 0; k < len(submatches); k += 2 { - if submatches[k] == -1 { - if result[k/2] != "" { - t.Errorf("match %d: expected nil got %q: %s", n, result, test) - } - continue - } - expect := test.text[submatches[k]:submatches[k+1]] - if expect != result[k/2] { - t.Errorf("match %d: expected %q got %q: %s", n, expect, result, test) - return - } - } -} - -func TestFindStringSubmatch(t *testing.T) { - for _, test := range findTests { - result := MustCompile(test.pat).FindStringSubmatch(test.text) - switch { - case test.matches == nil && result == nil: - // ok - case test.matches == nil && result != nil: - t.Errorf("expected no match; got one: %s", test) - case test.matches != nil && result == nil: - t.Errorf("expected match; got none: %s", test) - case test.matches != nil && result != nil: - testSubmatchString(&test, 0, test.matches[0], result, t) - } - } -} - -func testSubmatchIndices(test *FindTest, n int, expect, result []int, t *testing.T) { - if len(expect) != len(result) { - t.Errorf("match %d: expected %d matches; got %d: %s", n, len(expect)/2, len(result)/2, test) - return - } - for k, e := range expect { - if e != result[k] { - t.Errorf("match %d: submatch error: expected %v got %v: %s", n, expect, result, test) - } - } -} - -func testFindSubmatchIndex(test *FindTest, result []int, t *testing.T) { - switch { - case test.matches == nil && result == nil: - // ok - case test.matches == nil && result != nil: - t.Errorf("expected no match; got one: %s", test) - case test.matches != nil && result == nil: - t.Errorf("expected match; got none: %s", test) - case test.matches != nil && result != nil: - testSubmatchIndices(test, 0, test.matches[0], result, t) - } -} - -func TestFindSubmatchIndex(t *testing.T) { - for _, test := range findTests { - testFindSubmatchIndex(&test, MustCompile(test.pat).FindSubmatchIndex([]byte(test.text)), t) - } -} - -func TestFindStringSubmatchIndex(t *testing.T) { - for _, test := range findTests { - testFindSubmatchIndex(&test, MustCompile(test.pat).FindStringSubmatchIndex(test.text), t) - } -} - -func TestFindReaderSubmatchIndex(t *testing.T) { - for _, test := range findTests { - testFindSubmatchIndex(&test, MustCompile(test.pat).FindReaderSubmatchIndex(strings.NewReader(test.text)), t) - } -} - -// Now come the monster AllSubmatch cases. - -func TestFindAllSubmatch(t *testing.T) { - for _, test := range findTests { - result := MustCompile(test.pat).FindAllSubmatch([]byte(test.text), -1) - switch { - case test.matches == nil && result == nil: - // ok - case test.matches == nil && result != nil: - t.Errorf("expected no match; got one: %s", test) - case test.matches != nil && result == nil: - t.Errorf("expected match; got none: %s", test) - case len(test.matches) != len(result): - t.Errorf("expected %d matches; got %d: %s", len(test.matches), len(result), test) - case test.matches != nil && result != nil: - for k, match := range test.matches { - testSubmatchBytes(&test, k, match, result[k], t) - } - } - } -} - -func TestFindAllStringSubmatch(t *testing.T) { - for _, test := range findTests { - result := MustCompile(test.pat).FindAllStringSubmatch(test.text, -1) - switch { - case test.matches == nil && result == nil: - // ok - case test.matches == nil && result != nil: - t.Errorf("expected no match; got one: %s", test) - case test.matches != nil && result == nil: - t.Errorf("expected match; got none: %s", test) - case len(test.matches) != len(result): - t.Errorf("expected %d matches; got %d: %s", len(test.matches), len(result), test) - case test.matches != nil && result != nil: - for k, match := range test.matches { - testSubmatchString(&test, k, match, result[k], t) - } - } - } -} - -func testFindAllSubmatchIndex(test *FindTest, result [][]int, t *testing.T) { - switch { - case test.matches == nil && result == nil: - // ok - case test.matches == nil && result != nil: - t.Errorf("expected no match; got one: %s", test) - case test.matches != nil && result == nil: - t.Errorf("expected match; got none: %s", test) - case len(test.matches) != len(result): - t.Errorf("expected %d matches; got %d: %s", len(test.matches), len(result), test) - case test.matches != nil && result != nil: - for k, match := range test.matches { - testSubmatchIndices(test, k, match, result[k], t) - } - } -} - -func TestFindAllSubmatchIndex(t *testing.T) { - for _, test := range findTests { - testFindAllSubmatchIndex(&test, MustCompile(test.pat).FindAllSubmatchIndex([]byte(test.text), -1), t) - } -} - -func TestFindAllStringSubmatchIndex(t *testing.T) { - for _, test := range findTests { - testFindAllSubmatchIndex(&test, MustCompile(test.pat).FindAllStringSubmatchIndex(test.text, -1), t) - } -} diff --git a/src/pkg/old/regexp/regexp.go b/src/pkg/old/regexp/regexp.go deleted file mode 100644 index d3044d0c1d7..00000000000 --- a/src/pkg/old/regexp/regexp.go +++ /dev/null @@ -1,1488 +0,0 @@ -// Copyright 2010 The Go Authors. All rights reserved. -// Use of this source code is governed by a BSD-style -// license that can be found in the LICENSE file. - -// Package regexp implements a simple regular expression library. -// -// The syntax of the regular expressions accepted is: -// -// regexp: -// concatenation { '|' concatenation } -// concatenation: -// { closure } -// closure: -// term [ '*' | '+' | '?' ] -// term: -// '^' -// '$' -// '.' -// character -// '[' [ '^' ] { character-range } ']' -// '(' regexp ')' -// character-range: -// character [ '-' character ] -// -// All characters are UTF-8-encoded code points. Backslashes escape special -// characters, including inside character classes. The standard Go character -// escapes are also recognized: \a \b \f \n \r \t \v. -// -// There are 16 methods of Regexp that match a regular expression and identify -// the matched text. Their names are matched by this regular expression: -// -// Find(All)?(String)?(Submatch)?(Index)? -// -// If 'All' is present, the routine matches successive non-overlapping -// matches of the entire expression. Empty matches abutting a preceding -// match are ignored. The return value is a slice containing the successive -// return values of the corresponding non-'All' routine. These routines take -// an extra integer argument, n; if n >= 0, the function returns at most n -// matches/submatches. -// -// If 'String' is present, the argument is a string; otherwise it is a slice -// of bytes; return values are adjusted as appropriate. -// -// If 'Submatch' is present, the return value is a slice identifying the -// successive submatches of the expression. Submatches are matches of -// parenthesized subexpressions within the regular expression, numbered from -// left to right in order of opening parenthesis. Submatch 0 is the match of -// the entire expression, submatch 1 the match of the first parenthesized -// subexpression, and so on. -// -// If 'Index' is present, matches and submatches are identified by byte index -// pairs within the input string: result[2*n:2*n+1] identifies the indexes of -// the nth submatch. The pair for n==0 identifies the match of the entire -// expression. If 'Index' is not present, the match is identified by the -// text of the match/submatch. If an index is negative, it means that -// subexpression did not match any string in the input. -// -// There is also a subset of the methods that can be applied to text read -// from a RuneReader: -// -// MatchReader, FindReaderIndex, FindReaderSubmatchIndex -// -// This set may grow. Note that regular expression matches may need to -// examine text beyond the text returned by a match, so the methods that -// match text from a RuneReader may read arbitrarily far into the input -// before returning. -// -// (There are a few other methods that do not match this pattern.) -// -package regexp - -import ( - "bytes" - "io" - "strings" - "unicode/utf8" -) - -var debug = false - -// Error is the local type for a parsing error. -type Error string - -func (e Error) Error() string { - return string(e) -} - -// Error codes returned by failures to parse an expression. -var ( - ErrInternal = Error("regexp: internal error") - ErrUnmatchedLpar = Error("regexp: unmatched '('") - ErrUnmatchedRpar = Error("regexp: unmatched ')'") - ErrUnmatchedLbkt = Error("regexp: unmatched '['") - ErrUnmatchedRbkt = Error("regexp: unmatched ']'") - ErrBadRange = Error("regexp: bad range in character class") - ErrExtraneousBackslash = Error("regexp: extraneous backslash") - ErrBadClosure = Error("regexp: repeated closure (**, ++, etc.)") - ErrBareClosure = Error("regexp: closure applies to nothing") - ErrBadBackslash = Error("regexp: illegal backslash escape") -) - -const ( - iStart = iota // beginning of program - iEnd // end of program: success - iBOT // '^' beginning of text - iEOT // '$' end of text - iChar // 'a' regular character - iCharClass // [a-z] character class - iAny // '.' any character including newline - iNotNL // [^\n] special case: any character but newline - iBra // '(' parenthesized expression: 2*braNum for left, 2*braNum+1 for right - iAlt // '|' alternation - iNop // do nothing; makes it easy to link without patching -) - -// An instruction executed by the NFA -type instr struct { - kind int // the type of this instruction: iChar, iAny, etc. - index int // used only in debugging; could be eliminated - next *instr // the instruction to execute after this one - // Special fields valid only for some items. - char rune // iChar - braNum int // iBra, iEbra - cclass *charClass // iCharClass - left *instr // iAlt, other branch -} - -func (i *instr) print() { - switch i.kind { - case iStart: - print("start") - case iEnd: - print("end") - case iBOT: - print("bot") - case iEOT: - print("eot") - case iChar: - print("char ", string(i.char)) - case iCharClass: - i.cclass.print() - case iAny: - print("any") - case iNotNL: - print("notnl") - case iBra: - if i.braNum&1 == 0 { - print("bra", i.braNum/2) - } else { - print("ebra", i.braNum/2) - } - case iAlt: - print("alt(", i.left.index, ")") - case iNop: - print("nop") - } -} - -// Regexp is the representation of a compiled regular expression. -// The public interface is entirely through methods. -// A Regexp is safe for concurrent use by multiple goroutines. -type Regexp struct { - expr string // the original expression - prefix string // initial plain text string - prefixBytes []byte // initial plain text bytes - inst []*instr - start *instr // first instruction of machine - prefixStart *instr // where to start if there is a prefix - nbra int // number of brackets in expression, for subexpressions -} - -type charClass struct { - negate bool // is character class negated? ([^a-z]) - // slice of int, stored pairwise: [a-z] is (a,z); x is (x,x): - ranges []rune - cmin, cmax rune -} - -func (cclass *charClass) print() { - print("charclass") - if cclass.negate { - print(" (negated)") - } - for i := 0; i < len(cclass.ranges); i += 2 { - l := cclass.ranges[i] - r := cclass.ranges[i+1] - if l == r { - print(" [", string(l), "]") - } else { - print(" [", string(l), "-", string(r), "]") - } - } -} - -func (cclass *charClass) addRange(a, b rune) { - // range is a through b inclusive - cclass.ranges = append(cclass.ranges, a, b) - if a < cclass.cmin { - cclass.cmin = a - } - if b > cclass.cmax { - cclass.cmax = b - } -} - -func (cclass *charClass) matches(c rune) bool { - if c < cclass.cmin || c > cclass.cmax { - return cclass.negate - } - ranges := cclass.ranges - for i := 0; i < len(ranges); i = i + 2 { - if ranges[i] <= c && c <= ranges[i+1] { - return !cclass.negate - } - } - return cclass.negate -} - -func newCharClass() *instr { - i := &instr{kind: iCharClass} - i.cclass = new(charClass) - i.cclass.ranges = make([]rune, 0, 4) - i.cclass.cmin = 0x10FFFF + 1 // MaxRune + 1 - i.cclass.cmax = -1 - return i -} - -func (re *Regexp) add(i *instr) *instr { - i.index = len(re.inst) - re.inst = append(re.inst, i) - return i -} - -type parser struct { - re *Regexp - nlpar int // number of unclosed lpars - pos int - ch rune -} - -func (p *parser) error(err Error) { - panic(err) -} - -const endOfText = -1 - -func (p *parser) c() rune { return p.ch } - -func (p *parser) nextc() rune { - if p.pos >= len(p.re.expr) { - p.ch = endOfText - } else { - c, w := utf8.DecodeRuneInString(p.re.expr[p.pos:]) - p.ch = c - p.pos += w - } - return p.ch -} - -func newParser(re *Regexp) *parser { - p := new(parser) - p.re = re - p.nextc() // load p.ch - return p -} - -func special(c rune) bool { - for _, r := range `\.+*?()|[]^$` { - if c == r { - return true - } - } - return false -} - -func ispunct(c rune) bool { - for _, r := range "!\"#$%&'()*+,-./:;<=>?@[\\]^_`{|}~" { - if c == r { - return true - } - } - return false -} - -var escapes = []byte("abfnrtv") -var escaped = []byte("\a\b\f\n\r\t\v") - -func escape(c rune) int { - for i, b := range escapes { - if rune(b) == c { - return i - } - } - return -1 -} - -func (p *parser) checkBackslash() rune { - c := p.c() - if c == '\\' { - c = p.nextc() - switch { - case c == endOfText: - p.error(ErrExtraneousBackslash) - case ispunct(c): - // c is as delivered - case escape(c) >= 0: - c = rune(escaped[escape(c)]) - default: - p.error(ErrBadBackslash) - } - } - return c -} - -func (p *parser) charClass() *instr { - i := newCharClass() - cc := i.cclass - if p.c() == '^' { - cc.negate = true - p.nextc() - } - left := rune(-1) - for { - switch c := p.c(); c { - case ']', endOfText: - if left >= 0 { - p.error(ErrBadRange) - } - // Is it [^\n]? - if cc.negate && len(cc.ranges) == 2 && - cc.ranges[0] == '\n' && cc.ranges[1] == '\n' { - nl := &instr{kind: iNotNL} - p.re.add(nl) - return nl - } - // Special common case: "[a]" -> "a" - if !cc.negate && len(cc.ranges) == 2 && cc.ranges[0] == cc.ranges[1] { - c := &instr{kind: iChar, char: cc.ranges[0]} - p.re.add(c) - return c - } - p.re.add(i) - return i - case '-': // do this before backslash processing - p.error(ErrBadRange) - default: - c = p.checkBackslash() - p.nextc() - switch { - case left < 0: // first of pair - if p.c() == '-' { // range - p.nextc() - left = c - } else { // single char - cc.addRange(c, c) - } - case left <= c: // second of pair - cc.addRange(left, c) - left = -1 - default: - p.error(ErrBadRange) - } - } - } - panic("unreachable") -} - -func (p *parser) term() (start, end *instr) { - switch c := p.c(); c { - case '|', endOfText: - return nil, nil - case '*', '+', '?': - p.error(ErrBareClosure) - case ')': - if p.nlpar == 0 { - p.error(ErrUnmatchedRpar) - } - return nil, nil - case ']': - p.error(ErrUnmatchedRbkt) - case '^': - p.nextc() - start = p.re.add(&instr{kind: iBOT}) - return start, start - case '$': - p.nextc() - start = p.re.add(&instr{kind: iEOT}) - return start, start - case '.': - p.nextc() - start = p.re.add(&instr{kind: iAny}) - return start, start - case '[': - p.nextc() - start = p.charClass() - if p.c() != ']' { - p.error(ErrUnmatchedLbkt) - } - p.nextc() - return start, start - case '(': - p.nextc() - p.nlpar++ - p.re.nbra++ // increment first so first subexpr is \1 - nbra := p.re.nbra - start, end = p.regexp() - if p.c() != ')' { - p.error(ErrUnmatchedLpar) - } - p.nlpar-- - p.nextc() - bra := &instr{kind: iBra, braNum: 2 * nbra} - p.re.add(bra) - ebra := &instr{kind: iBra, braNum: 2*nbra + 1} - p.re.add(ebra) - if start == nil { - if end == nil { - p.error(ErrInternal) - return - } - start = ebra - } else { - end.next = ebra - } - bra.next = start - return bra, ebra - default: - c = p.checkBackslash() - p.nextc() - start = &instr{kind: iChar, char: c} - p.re.add(start) - return start, start - } - panic("unreachable") -} - -func (p *parser) closure() (start, end *instr) { - start, end = p.term() - if start == nil { - return - } - switch p.c() { - case '*': - // (start,end)*: - alt := &instr{kind: iAlt} - p.re.add(alt) - end.next = alt // after end, do alt - alt.left = start // alternate brach: return to start - start = alt // alt becomes new (start, end) - end = alt - case '+': - // (start,end)+: - alt := &instr{kind: iAlt} - p.re.add(alt) - end.next = alt // after end, do alt - alt.left = start // alternate brach: return to start - end = alt // start is unchanged; end is alt - case '?': - // (start,end)?: - alt := &instr{kind: iAlt} - p.re.add(alt) - nop := &instr{kind: iNop} - p.re.add(nop) - alt.left = start // alternate branch is start - alt.next = nop // follow on to nop - end.next = nop // after end, go to nop - start = alt // start is now alt - end = nop // end is nop pointed to by both branches - default: - return - } - switch p.nextc() { - case '*', '+', '?': - p.error(ErrBadClosure) - } - return -} - -func (p *parser) concatenation() (start, end *instr) { - for { - nstart, nend := p.closure() - switch { - case nstart == nil: // end of this concatenation - if start == nil { // this is the empty string - nop := p.re.add(&instr{kind: iNop}) - return nop, nop - } - return - case start == nil: // this is first element of concatenation - start, end = nstart, nend - default: - end.next = nstart - end = nend - } - } - panic("unreachable") -} - -func (p *parser) regexp() (start, end *instr) { - start, end = p.concatenation() - for { - switch p.c() { - default: - return - case '|': - p.nextc() - nstart, nend := p.concatenation() - alt := &instr{kind: iAlt} - p.re.add(alt) - alt.left = start - alt.next = nstart - nop := &instr{kind: iNop} - p.re.add(nop) - end.next = nop - nend.next = nop - start, end = alt, nop - } - } - panic("unreachable") -} - -func unNop(i *instr) *instr { - for i.kind == iNop { - i = i.next - } - return i -} - -func (re *Regexp) eliminateNops() { - for _, inst := range re.inst { - if inst.kind == iEnd { - continue - } - inst.next = unNop(inst.next) - if inst.kind == iAlt { - inst.left = unNop(inst.left) - } - } -} - -func (re *Regexp) dump() { - print("prefix <", re.prefix, ">\n") - for _, inst := range re.inst { - print(inst.index, ": ") - inst.print() - if inst.kind != iEnd { - print(" -> ", inst.next.index) - } - print("\n") - } -} - -func (re *Regexp) doParse() { - p := newParser(re) - start := &instr{kind: iStart} - re.add(start) - s, e := p.regexp() - start.next = s - re.start = start - e.next = re.add(&instr{kind: iEnd}) - - if debug { - re.dump() - println() - } - - re.eliminateNops() - if debug { - re.dump() - println() - } - re.setPrefix() - if debug { - re.dump() - println() - } -} - -// Extract regular text from the beginning of the pattern, -// possibly after a leading iBOT. -// That text can be used by doExecute to speed up matching. -func (re *Regexp) setPrefix() { - var b []byte - var utf = make([]byte, utf8.UTFMax) - var inst *instr - // First instruction is start; skip that. Also skip any initial iBOT. - inst = re.inst[0].next - for inst.kind == iBOT { - inst = inst.next - } -Loop: - for ; inst.kind != iEnd; inst = inst.next { - // stop if this is not a char - if inst.kind != iChar { - break - } - // stop if this char can be followed by a match for an empty string, - // which includes closures, ^, and $. - switch inst.next.kind { - case iBOT, iEOT, iAlt: - break Loop - } - n := utf8.EncodeRune(utf, inst.char) - b = append(b, utf[0:n]...) - } - // point prefixStart instruction to first non-CHAR after prefix - re.prefixStart = inst - re.prefixBytes = b - re.prefix = string(b) -} - -// String returns the source text used to compile the regular expression. -func (re *Regexp) String() string { - return re.expr -} - -// Compile parses a regular expression and returns, if successful, a Regexp -// object that can be used to match against text. -func Compile(str string) (regexp *Regexp, error error) { - regexp = new(Regexp) - // doParse will panic if there is a parse error. - defer func() { - if e := recover(); e != nil { - regexp = nil - error = e.(Error) // Will re-panic if error was not an Error, e.g. nil-pointer exception - } - }() - regexp.expr = str - regexp.inst = make([]*instr, 0, 10) - regexp.doParse() - return -} - -// MustCompile is like Compile but panics if the expression cannot be parsed. -// It simplifies safe initialization of global variables holding compiled regular -// expressions. -func MustCompile(str string) *Regexp { - regexp, error := Compile(str) - if error != nil { - panic(`regexp: compiling "` + str + `": ` + error.Error()) - } - return regexp -} - -// NumSubexp returns the number of parenthesized subexpressions in this Regexp. -func (re *Regexp) NumSubexp() int { return re.nbra } - -// The match arena allows us to reduce the garbage generated by tossing -// match vectors away as we execute. Matches are ref counted and returned -// to a free list when no longer active. Increases a simple benchmark by 22X. -type matchArena struct { - head *matchVec - len int // length of match vector - pos int - atBOT bool // whether we're at beginning of text - atEOT bool // whether we're at end of text -} - -type matchVec struct { - m []int // pairs of bracketing submatches. 0th is start,end - ref int - next *matchVec -} - -func (a *matchArena) new() *matchVec { - if a.head == nil { - const N = 10 - block := make([]matchVec, N) - for i := 0; i < N; i++ { - b := &block[i] - b.next = a.head - a.head = b - } - } - m := a.head - a.head = m.next - m.ref = 0 - if m.m == nil { - m.m = make([]int, a.len) - } - return m -} - -func (a *matchArena) free(m *matchVec) { - m.ref-- - if m.ref == 0 { - m.next = a.head - a.head = m - } -} - -func (a *matchArena) copy(m *matchVec) *matchVec { - m1 := a.new() - copy(m1.m, m.m) - return m1 -} - -func (a *matchArena) noMatch() *matchVec { - m := a.new() - for i := range m.m { - m.m[i] = -1 // no match seen; catches cases like "a(b)?c" on "ac" - } - m.ref = 1 - return m -} - -type state struct { - inst *instr // next instruction to execute - prefixed bool // this match began with a fixed prefix - match *matchVec -} - -// Append new state to to-do list. Leftmost-longest wins so avoid -// adding a state that's already active. The matchVec will be inc-ref'ed -// if it is assigned to a state. -func (a *matchArena) addState(s []state, inst *instr, prefixed bool, match *matchVec) []state { - switch inst.kind { - case iBOT: - if a.atBOT { - s = a.addState(s, inst.next, prefixed, match) - } - return s - case iEOT: - if a.atEOT { - s = a.addState(s, inst.next, prefixed, match) - } - return s - case iBra: - match.m[inst.braNum] = a.pos - s = a.addState(s, inst.next, prefixed, match) - return s - } - l := len(s) - // States are inserted in order so it's sufficient to see if we have the same - // instruction; no need to see if existing match is earlier (it is). - for i := 0; i < l; i++ { - if s[i].inst == inst { - return s - } - } - s = append(s, state{inst, prefixed, match}) - match.ref++ - if inst.kind == iAlt { - s = a.addState(s, inst.left, prefixed, a.copy(match)) - // give other branch a copy of this match vector - s = a.addState(s, inst.next, prefixed, a.copy(match)) - } - return s -} - -// input abstracts different representations of the input text. It provides -// one-character lookahead. -type input interface { - step(pos int) (r rune, width int) // advance one rune - canCheckPrefix() bool // can we look ahead without losing info? - hasPrefix(re *Regexp) bool - index(re *Regexp, pos int) int -} - -// inputString scans a string. -type inputString struct { - str string -} - -func newInputString(str string) *inputString { - return &inputString{str: str} -} - -func (i *inputString) step(pos int) (rune, int) { - if pos < len(i.str) { - return utf8.DecodeRuneInString(i.str[pos:len(i.str)]) - } - return endOfText, 0 -} - -func (i *inputString) canCheckPrefix() bool { - return true -} - -func (i *inputString) hasPrefix(re *Regexp) bool { - return strings.HasPrefix(i.str, re.prefix) -} - -func (i *inputString) index(re *Regexp, pos int) int { - return strings.Index(i.str[pos:], re.prefix) -} - -// inputBytes scans a byte slice. -type inputBytes struct { - str []byte -} - -func newInputBytes(str []byte) *inputBytes { - return &inputBytes{str: str} -} - -func (i *inputBytes) step(pos int) (rune, int) { - if pos < len(i.str) { - return utf8.DecodeRune(i.str[pos:len(i.str)]) - } - return endOfText, 0 -} - -func (i *inputBytes) canCheckPrefix() bool { - return true -} - -func (i *inputBytes) hasPrefix(re *Regexp) bool { - return bytes.HasPrefix(i.str, re.prefixBytes) -} - -func (i *inputBytes) index(re *Regexp, pos int) int { - return bytes.Index(i.str[pos:], re.prefixBytes) -} - -// inputReader scans a RuneReader. -type inputReader struct { - r io.RuneReader - atEOT bool - pos int -} - -func newInputReader(r io.RuneReader) *inputReader { - return &inputReader{r: r} -} - -func (i *inputReader) step(pos int) (rune, int) { - if !i.atEOT && pos != i.pos { - return endOfText, 0 - - } - r, w, err := i.r.ReadRune() - if err != nil { - i.atEOT = true - return endOfText, 0 - } - i.pos += w - return r, w -} - -func (i *inputReader) canCheckPrefix() bool { - return false -} - -func (i *inputReader) hasPrefix(re *Regexp) bool { - return false -} - -func (i *inputReader) index(re *Regexp, pos int) int { - return -1 -} - -// Search match starting from pos bytes into the input. -func (re *Regexp) doExecute(i input, pos int) []int { - var s [2][]state - s[0] = make([]state, 0, 10) - s[1] = make([]state, 0, 10) - in, out := 0, 1 - var final state - found := false - anchored := re.inst[0].next.kind == iBOT - if anchored && pos > 0 { - return nil - } - // fast check for initial plain substring - if i.canCheckPrefix() && re.prefix != "" { - advance := 0 - if anchored { - if !i.hasPrefix(re) { - return nil - } - } else { - advance = i.index(re, pos) - if advance == -1 { - return nil - } - } - pos += advance - } - // We look one character ahead so we can match $, which checks whether - // we are at EOT. - nextChar, nextWidth := i.step(pos) - arena := &matchArena{ - len: 2 * (re.nbra + 1), - pos: pos, - atBOT: pos == 0, - atEOT: nextChar == endOfText, - } - for c, startPos := rune(0), pos; c != endOfText; { - if !found && (pos == startPos || !anchored) { - // prime the pump if we haven't seen a match yet - match := arena.noMatch() - match.m[0] = pos - s[out] = arena.addState(s[out], re.start.next, false, match) - arena.free(match) // if addState saved it, ref was incremented - } else if len(s[out]) == 0 { - // machine has completed - break - } - in, out = out, in // old out state is new in state - // clear out old state - old := s[out] - for _, state := range old { - arena.free(state.match) - } - s[out] = old[0:0] // truncate state vector - c = nextChar - thisPos := pos - pos += nextWidth - nextChar, nextWidth = i.step(pos) - arena.atEOT = nextChar == endOfText - arena.atBOT = false - arena.pos = pos - for _, st := range s[in] { - switch st.inst.kind { - case iBOT: - case iEOT: - case iChar: - if c == st.inst.char { - s[out] = arena.addState(s[out], st.inst.next, st.prefixed, st.match) - } - case iCharClass: - if st.inst.cclass.matches(c) { - s[out] = arena.addState(s[out], st.inst.next, st.prefixed, st.match) - } - case iAny: - if c != endOfText { - s[out] = arena.addState(s[out], st.inst.next, st.prefixed, st.match) - } - case iNotNL: - if c != endOfText && c != '\n' { - s[out] = arena.addState(s[out], st.inst.next, st.prefixed, st.match) - } - case iBra: - case iAlt: - case iEnd: - // choose leftmost longest - if !found || // first - st.match.m[0] < final.match.m[0] || // leftmost - (st.match.m[0] == final.match.m[0] && thisPos > final.match.m[1]) { // longest - if final.match != nil { - arena.free(final.match) - } - final = st - final.match.ref++ - final.match.m[1] = thisPos - } - found = true - default: - st.inst.print() - panic("unknown instruction in execute") - } - } - } - if final.match == nil { - return nil - } - // if match found, back up start of match by width of prefix. - if final.prefixed && len(final.match.m) > 0 { - final.match.m[0] -= len(re.prefix) - } - return final.match.m -} - -// LiteralPrefix returns a literal string that must begin any match -// of the regular expression re. It returns the boolean true if the -// literal string comprises the entire regular expression. -func (re *Regexp) LiteralPrefix() (prefix string, complete bool) { - c := make([]rune, len(re.inst)-2) // minus start and end. - // First instruction is start; skip that. - i := 0 - for inst := re.inst[0].next; inst.kind != iEnd; inst = inst.next { - // stop if this is not a char - if inst.kind != iChar { - return string(c[:i]), false - } - c[i] = inst.char - i++ - } - return string(c[:i]), true -} - -// MatchReader returns whether the Regexp matches the text read by the -// RuneReader. The return value is a boolean: true for match, false for no -// match. -func (re *Regexp) MatchReader(r io.RuneReader) bool { - return len(re.doExecute(newInputReader(r), 0)) > 0 -} - -// MatchString returns whether the Regexp matches the string s. -// The return value is a boolean: true for match, false for no match. -func (re *Regexp) MatchString(s string) bool { return len(re.doExecute(newInputString(s), 0)) > 0 } - -// Match returns whether the Regexp matches the byte slice b. -// The return value is a boolean: true for match, false for no match. -func (re *Regexp) Match(b []byte) bool { return len(re.doExecute(newInputBytes(b), 0)) > 0 } - -// MatchReader checks whether a textual regular expression matches the text -// read by the RuneReader. More complicated queries need to use Compile and -// the full Regexp interface. -func MatchReader(pattern string, r io.RuneReader) (matched bool, error error) { - re, err := Compile(pattern) - if err != nil { - return false, err - } - return re.MatchReader(r), nil -} - -// MatchString checks whether a textual regular expression -// matches a string. More complicated queries need -// to use Compile and the full Regexp interface. -func MatchString(pattern string, s string) (matched bool, error error) { - re, err := Compile(pattern) - if err != nil { - return false, err - } - return re.MatchString(s), nil -} - -// Match checks whether a textual regular expression -// matches a byte slice. More complicated queries need -// to use Compile and the full Regexp interface. -func Match(pattern string, b []byte) (matched bool, error error) { - re, err := Compile(pattern) - if err != nil { - return false, err - } - return re.Match(b), nil -} - -// ReplaceAllString returns a copy of src in which all matches for the Regexp -// have been replaced by repl. No support is provided for expressions -// (e.g. \1 or $1) in the replacement string. -func (re *Regexp) ReplaceAllString(src, repl string) string { - return re.ReplaceAllStringFunc(src, func(string) string { return repl }) -} - -// ReplaceAllStringFunc returns a copy of src in which all matches for the -// Regexp have been replaced by the return value of of function repl (whose -// first argument is the matched string). No support is provided for -// expressions (e.g. \1 or $1) in the replacement string. -func (re *Regexp) ReplaceAllStringFunc(src string, repl func(string) string) string { - lastMatchEnd := 0 // end position of the most recent match - searchPos := 0 // position where we next look for a match - buf := new(bytes.Buffer) - for searchPos <= len(src) { - a := re.doExecute(newInputString(src), searchPos) - if len(a) == 0 { - break // no more matches - } - - // Copy the unmatched characters before this match. - io.WriteString(buf, src[lastMatchEnd:a[0]]) - - // Now insert a copy of the replacement string, but not for a - // match of the empty string immediately after another match. - // (Otherwise, we get double replacement for patterns that - // match both empty and nonempty strings.) - if a[1] > lastMatchEnd || a[0] == 0 { - io.WriteString(buf, repl(src[a[0]:a[1]])) - } - lastMatchEnd = a[1] - - // Advance past this match; always advance at least one character. - _, width := utf8.DecodeRuneInString(src[searchPos:]) - if searchPos+width > a[1] { - searchPos += width - } else if searchPos+1 > a[1] { - // This clause is only needed at the end of the input - // string. In that case, DecodeRuneInString returns width=0. - searchPos++ - } else { - searchPos = a[1] - } - } - - // Copy the unmatched characters after the last match. - io.WriteString(buf, src[lastMatchEnd:]) - - return buf.String() -} - -// ReplaceAll returns a copy of src in which all matches for the Regexp -// have been replaced by repl. No support is provided for expressions -// (e.g. \1 or $1) in the replacement text. -func (re *Regexp) ReplaceAll(src, repl []byte) []byte { - return re.ReplaceAllFunc(src, func([]byte) []byte { return repl }) -} - -// ReplaceAllFunc returns a copy of src in which all matches for the -// Regexp have been replaced by the return value of of function repl (whose -// first argument is the matched []byte). No support is provided for -// expressions (e.g. \1 or $1) in the replacement string. -func (re *Regexp) ReplaceAllFunc(src []byte, repl func([]byte) []byte) []byte { - lastMatchEnd := 0 // end position of the most recent match - searchPos := 0 // position where we next look for a match - buf := new(bytes.Buffer) - for searchPos <= len(src) { - a := re.doExecute(newInputBytes(src), searchPos) - if len(a) == 0 { - break // no more matches - } - - // Copy the unmatched characters before this match. - buf.Write(src[lastMatchEnd:a[0]]) - - // Now insert a copy of the replacement string, but not for a - // match of the empty string immediately after another match. - // (Otherwise, we get double replacement for patterns that - // match both empty and nonempty strings.) - if a[1] > lastMatchEnd || a[0] == 0 { - buf.Write(repl(src[a[0]:a[1]])) - } - lastMatchEnd = a[1] - - // Advance past this match; always advance at least one character. - _, width := utf8.DecodeRune(src[searchPos:]) - if searchPos+width > a[1] { - searchPos += width - } else if searchPos+1 > a[1] { - // This clause is only needed at the end of the input - // string. In that case, DecodeRuneInString returns width=0. - searchPos++ - } else { - searchPos = a[1] - } - } - - // Copy the unmatched characters after the last match. - buf.Write(src[lastMatchEnd:]) - - return buf.Bytes() -} - -// QuoteMeta returns a string that quotes all regular expression metacharacters -// inside the argument text; the returned string is a regular expression matching -// the literal text. For example, QuoteMeta(`[foo]`) returns `\[foo\]`. -func QuoteMeta(s string) string { - b := make([]byte, 2*len(s)) - - // A byte loop is correct because all metacharacters are ASCII. - j := 0 - for i := 0; i < len(s); i++ { - if special(rune(s[i])) { - b[j] = '\\' - j++ - } - b[j] = s[i] - j++ - } - return string(b[0:j]) -} - -// Find matches in slice b if b is non-nil, otherwise find matches in string s. -func (re *Regexp) allMatches(s string, b []byte, n int, deliver func([]int)) { - var end int - if b == nil { - end = len(s) - } else { - end = len(b) - } - - for pos, i, prevMatchEnd := 0, 0, -1; i < n && pos <= end; { - var in input - if b == nil { - in = newInputString(s) - } else { - in = newInputBytes(b) - } - matches := re.doExecute(in, pos) - if len(matches) == 0 { - break - } - - accept := true - if matches[1] == pos { - // We've found an empty match. - if matches[0] == prevMatchEnd { - // We don't allow an empty match right - // after a previous match, so ignore it. - accept = false - } - var width int - // TODO: use step() - if b == nil { - _, width = utf8.DecodeRuneInString(s[pos:end]) - } else { - _, width = utf8.DecodeRune(b[pos:end]) - } - if width > 0 { - pos += width - } else { - pos = end + 1 - } - } else { - pos = matches[1] - } - prevMatchEnd = matches[1] - - if accept { - deliver(matches) - i++ - } - } -} - -// Find returns a slice holding the text of the leftmost match in b of the regular expression. -// A return value of nil indicates no match. -func (re *Regexp) Find(b []byte) []byte { - a := re.doExecute(newInputBytes(b), 0) - if a == nil { - return nil - } - return b[a[0]:a[1]] -} - -// FindIndex returns a two-element slice of integers defining the location of -// the leftmost match in b of the regular expression. The match itself is at -// b[loc[0]:loc[1]]. -// A return value of nil indicates no match. -func (re *Regexp) FindIndex(b []byte) (loc []int) { - a := re.doExecute(newInputBytes(b), 0) - if a == nil { - return nil - } - return a[0:2] -} - -// FindString returns a string holding the text of the leftmost match in s of the regular -// expression. If there is no match, the return value is an empty string, -// but it will also be empty if the regular expression successfully matches -// an empty string. Use FindStringIndex or FindStringSubmatch if it is -// necessary to distinguish these cases. -func (re *Regexp) FindString(s string) string { - a := re.doExecute(newInputString(s), 0) - if a == nil { - return "" - } - return s[a[0]:a[1]] -} - -// FindStringIndex returns a two-element slice of integers defining the -// location of the leftmost match in s of the regular expression. The match -// itself is at s[loc[0]:loc[1]]. -// A return value of nil indicates no match. -func (re *Regexp) FindStringIndex(s string) []int { - a := re.doExecute(newInputString(s), 0) - if a == nil { - return nil - } - return a[0:2] -} - -// FindReaderIndex returns a two-element slice of integers defining the -// location of the leftmost match of the regular expression in text read from -// the RuneReader. The match itself is at s[loc[0]:loc[1]]. A return -// value of nil indicates no match. -func (re *Regexp) FindReaderIndex(r io.RuneReader) []int { - a := re.doExecute(newInputReader(r), 0) - if a == nil { - return nil - } - return a[0:2] -} - -// FindSubmatch returns a slice of slices holding the text of the leftmost -// match of the regular expression in b and the matches, if any, of its -// subexpressions, as defined by the 'Submatch' descriptions in the package -// comment. -// A return value of nil indicates no match. -func (re *Regexp) FindSubmatch(b []byte) [][]byte { - a := re.doExecute(newInputBytes(b), 0) - if a == nil { - return nil - } - ret := make([][]byte, len(a)/2) - for i := range ret { - if a[2*i] >= 0 { - ret[i] = b[a[2*i]:a[2*i+1]] - } - } - return ret -} - -// FindSubmatchIndex returns a slice holding the index pairs identifying the -// leftmost match of the regular expression in b and the matches, if any, of -// its subexpressions, as defined by the 'Submatch' and 'Index' descriptions -// in the package comment. -// A return value of nil indicates no match. -func (re *Regexp) FindSubmatchIndex(b []byte) []int { - return re.doExecute(newInputBytes(b), 0) -} - -// FindStringSubmatch returns a slice of strings holding the text of the -// leftmost match of the regular expression in s and the matches, if any, of -// its subexpressions, as defined by the 'Submatch' description in the -// package comment. -// A return value of nil indicates no match. -func (re *Regexp) FindStringSubmatch(s string) []string { - a := re.doExecute(newInputString(s), 0) - if a == nil { - return nil - } - ret := make([]string, len(a)/2) - for i := range ret { - if a[2*i] >= 0 { - ret[i] = s[a[2*i]:a[2*i+1]] - } - } - return ret -} - -// FindStringSubmatchIndex returns a slice holding the index pairs -// identifying the leftmost match of the regular expression in s and the -// matches, if any, of its subexpressions, as defined by the 'Submatch' and -// 'Index' descriptions in the package comment. -// A return value of nil indicates no match. -func (re *Regexp) FindStringSubmatchIndex(s string) []int { - return re.doExecute(newInputString(s), 0) -} - -// FindReaderSubmatchIndex returns a slice holding the index pairs -// identifying the leftmost match of the regular expression of text read by -// the RuneReader, and the matches, if any, of its subexpressions, as defined -// by the 'Submatch' and 'Index' descriptions in the package comment. A -// return value of nil indicates no match. -func (re *Regexp) FindReaderSubmatchIndex(r io.RuneReader) []int { - return re.doExecute(newInputReader(r), 0) -} - -const startSize = 10 // The size at which to start a slice in the 'All' routines. - -// FindAll is the 'All' version of Find; it returns a slice of all successive -// matches of the expression, as defined by the 'All' description in the -// package comment. -// A return value of nil indicates no match. -func (re *Regexp) FindAll(b []byte, n int) [][]byte { - if n < 0 { - n = len(b) + 1 - } - result := make([][]byte, 0, startSize) - re.allMatches("", b, n, func(match []int) { - result = append(result, b[match[0]:match[1]]) - }) - if len(result) == 0 { - return nil - } - return result -} - -// FindAllIndex is the 'All' version of FindIndex; it returns a slice of all -// successive matches of the expression, as defined by the 'All' description -// in the package comment. -// A return value of nil indicates no match. -func (re *Regexp) FindAllIndex(b []byte, n int) [][]int { - if n < 0 { - n = len(b) + 1 - } - result := make([][]int, 0, startSize) - re.allMatches("", b, n, func(match []int) { - result = append(result, match[0:2]) - }) - if len(result) == 0 { - return nil - } - return result -} - -// FindAllString is the 'All' version of FindString; it returns a slice of all -// successive matches of the expression, as defined by the 'All' description -// in the package comment. -// A return value of nil indicates no match. -func (re *Regexp) FindAllString(s string, n int) []string { - if n < 0 { - n = len(s) + 1 - } - result := make([]string, 0, startSize) - re.allMatches(s, nil, n, func(match []int) { - result = append(result, s[match[0]:match[1]]) - }) - if len(result) == 0 { - return nil - } - return result -} - -// FindAllStringIndex is the 'All' version of FindStringIndex; it returns a -// slice of all successive matches of the expression, as defined by the 'All' -// description in the package comment. -// A return value of nil indicates no match. -func (re *Regexp) FindAllStringIndex(s string, n int) [][]int { - if n < 0 { - n = len(s) + 1 - } - result := make([][]int, 0, startSize) - re.allMatches(s, nil, n, func(match []int) { - result = append(result, match[0:2]) - }) - if len(result) == 0 { - return nil - } - return result -} - -// FindAllSubmatch is the 'All' version of FindSubmatch; it returns a slice -// of all successive matches of the expression, as defined by the 'All' -// description in the package comment. -// A return value of nil indicates no match. -func (re *Regexp) FindAllSubmatch(b []byte, n int) [][][]byte { - if n < 0 { - n = len(b) + 1 - } - result := make([][][]byte, 0, startSize) - re.allMatches("", b, n, func(match []int) { - slice := make([][]byte, len(match)/2) - for j := range slice { - if match[2*j] >= 0 { - slice[j] = b[match[2*j]:match[2*j+1]] - } - } - result = append(result, slice) - }) - if len(result) == 0 { - return nil - } - return result -} - -// FindAllSubmatchIndex is the 'All' version of FindSubmatchIndex; it returns -// a slice of all successive matches of the expression, as defined by the -// 'All' description in the package comment. -// A return value of nil indicates no match. -func (re *Regexp) FindAllSubmatchIndex(b []byte, n int) [][]int { - if n < 0 { - n = len(b) + 1 - } - result := make([][]int, 0, startSize) - re.allMatches("", b, n, func(match []int) { - result = append(result, match) - }) - if len(result) == 0 { - return nil - } - return result -} - -// FindAllStringSubmatch is the 'All' version of FindStringSubmatch; it -// returns a slice of all successive matches of the expression, as defined by -// the 'All' description in the package comment. -// A return value of nil indicates no match. -func (re *Regexp) FindAllStringSubmatch(s string, n int) [][]string { - if n < 0 { - n = len(s) + 1 - } - result := make([][]string, 0, startSize) - re.allMatches(s, nil, n, func(match []int) { - slice := make([]string, len(match)/2) - for j := range slice { - if match[2*j] >= 0 { - slice[j] = s[match[2*j]:match[2*j+1]] - } - } - result = append(result, slice) - }) - if len(result) == 0 { - return nil - } - return result -} - -// FindAllStringSubmatchIndex is the 'All' version of -// FindStringSubmatchIndex; it returns a slice of all successive matches of -// the expression, as defined by the 'All' description in the package -// comment. -// A return value of nil indicates no match. -func (re *Regexp) FindAllStringSubmatchIndex(s string, n int) [][]int { - if n < 0 { - n = len(s) + 1 - } - result := make([][]int, 0, startSize) - re.allMatches(s, nil, n, func(match []int) { - result = append(result, match) - }) - if len(result) == 0 { - return nil - } - return result -} diff --git a/src/pkg/old/template/doc.go b/src/pkg/old/template/doc.go deleted file mode 100644 index e778d801dab..00000000000 --- a/src/pkg/old/template/doc.go +++ /dev/null @@ -1,91 +0,0 @@ -// Copyright 2009 The Go Authors. All rights reserved. -// Use of this source code is governed by a BSD-style -// license that can be found in the LICENSE file. - -/* - Package template implements data-driven templates for generating textual - output such as HTML. - - Templates are executed by applying them to a data structure. - Annotations in the template refer to elements of the data - structure (typically a field of a struct or a key in a map) - to control execution and derive values to be displayed. - The template walks the structure as it executes and the - "cursor" @ represents the value at the current location - in the structure. - - Data items may be values or pointers; the interface hides the - indirection. - - In the following, 'Field' is one of several things, according to the data. - - - The name of a field of a struct (result = data.Field), - - The value stored in a map under that key (result = data["Field"]), or - - The result of invoking a niladic single-valued method with that name - (result = data.Field()) - - If Field is a struct field or method name, it must be an exported - (capitalized) name. - - Major constructs ({} are the default delimiters for template actions; - [] are the notation in this comment for optional elements): - - {# comment } - - A one-line comment. - - {.section field} XXX [ {.or} YYY ] {.end} - - Set @ to the value of the field. It may be an explicit @ - to stay at the same point in the data. If the field is nil - or empty, execute YYY; otherwise execute XXX. - - {.repeated section field} XXX [ {.alternates with} ZZZ ] [ {.or} YYY ] {.end} - - Like .section, but field must be an array or slice. XXX - is executed for each element. If the array is nil or empty, - YYY is executed instead. If the {.alternates with} marker - is present, ZZZ is executed between iterations of XXX. - - {field} - {field1 field2 ...} - {field|formatter} - {field1 field2...|formatter} - {field|formatter1|formatter2} - - Insert the value of the fields into the output. Each field is - first looked for in the cursor, as in .section and .repeated. - If it is not found, the search continues in outer sections - until the top level is reached. - - If the field value is a pointer, leading asterisks indicate - that the value to be inserted should be evaluated through the - pointer. For example, if x.p is of type *int, {x.p} will - insert the value of the pointer but {*x.p} will insert the - value of the underlying integer. If the value is nil or not a - pointer, asterisks have no effect. - - If a formatter is specified, it must be named in the formatter - map passed to the template set up routines or in the default - set ("html","str","") and is used to process the data for - output. The formatter function has signature - func(wr io.Writer, formatter string, data ...interface{}) - where wr is the destination for output, data holds the field - values at the instantiation, and formatter is its name at - the invocation site. The default formatter just concatenates - the string representations of the fields. - - Multiple formatters separated by the pipeline character | are - executed sequentially, with each formatter receiving the bytes - emitted by the one to its left. - - As well as field names, one may use literals with Go syntax. - Integer, floating-point, and string literals are supported. - Raw strings may not span newlines. - - The delimiter strings get their default value, "{" and "}", from - JSON-template. They may be set to any non-empty, space-free - string using the SetDelims method. Their value can be printed - in the output using {.meta-left} and {.meta-right}. -*/ -package template diff --git a/src/pkg/old/template/execute.go b/src/pkg/old/template/execute.go deleted file mode 100644 index 464b620c98b..00000000000 --- a/src/pkg/old/template/execute.go +++ /dev/null @@ -1,346 +0,0 @@ -// Copyright 2009 The Go Authors. All rights reserved. -// Use of this source code is governed by a BSD-style -// license that can be found in the LICENSE file. - -// Code to execute a parsed template. - -package template - -import ( - "bytes" - "io" - "reflect" - "strings" -) - -// Internal state for executing a Template. As we evaluate the struct, -// the data item descends into the fields associated with sections, etc. -// Parent is used to walk upwards to find variables higher in the tree. -type state struct { - parent *state // parent in hierarchy - data reflect.Value // the driver data for this section etc. - wr io.Writer // where to send output - buf [2]bytes.Buffer // alternating buffers used when chaining formatters -} - -func (parent *state) clone(data reflect.Value) *state { - return &state{parent: parent, data: data, wr: parent.wr} -} - -// Evaluate interfaces and pointers looking for a value that can look up the name, via a -// struct field, method, or map key, and return the result of the lookup. -func (t *Template) lookup(st *state, v reflect.Value, name string) reflect.Value { - for v.IsValid() { - typ := v.Type() - if n := v.Type().NumMethod(); n > 0 { - for i := 0; i < n; i++ { - m := typ.Method(i) - mtyp := m.Type - if m.Name == name && mtyp.NumIn() == 1 && mtyp.NumOut() == 1 { - if !isExported(name) { - t.execError(st, t.linenum, "name not exported: %s in type %s", name, st.data.Type()) - } - return v.Method(i).Call(nil)[0] - } - } - } - switch av := v; av.Kind() { - case reflect.Ptr: - v = av.Elem() - case reflect.Interface: - v = av.Elem() - case reflect.Struct: - if !isExported(name) { - t.execError(st, t.linenum, "name not exported: %s in type %s", name, st.data.Type()) - } - return av.FieldByName(name) - case reflect.Map: - if v := av.MapIndex(reflect.ValueOf(name)); v.IsValid() { - return v - } - return reflect.Zero(typ.Elem()) - default: - return reflect.Value{} - } - } - return v -} - -// indirectPtr returns the item numLevels levels of indirection below the value. -// It is forgiving: if the value is not a pointer, it returns it rather than giving -// an error. If the pointer is nil, it is returned as is. -func indirectPtr(v reflect.Value, numLevels int) reflect.Value { - for i := numLevels; v.IsValid() && i > 0; i++ { - if p := v; p.Kind() == reflect.Ptr { - if p.IsNil() { - return v - } - v = p.Elem() - } else { - break - } - } - return v -} - -// Walk v through pointers and interfaces, extracting the elements within. -func indirect(v reflect.Value) reflect.Value { -loop: - for v.IsValid() { - switch av := v; av.Kind() { - case reflect.Ptr: - v = av.Elem() - case reflect.Interface: - v = av.Elem() - default: - break loop - } - } - return v -} - -// If the data for this template is a struct, find the named variable. -// Names of the form a.b.c are walked down the data tree. -// The special name "@" (the "cursor") denotes the current data. -// The value coming in (st.data) might need indirecting to reach -// a struct while the return value is not indirected - that is, -// it represents the actual named field. Leading stars indicate -// levels of indirection to be applied to the value. -func (t *Template) findVar(st *state, s string) reflect.Value { - data := st.data - flattenedName := strings.TrimLeft(s, "*") - numStars := len(s) - len(flattenedName) - s = flattenedName - if s == "@" { - return indirectPtr(data, numStars) - } - for _, elem := range strings.Split(s, ".") { - // Look up field; data must be a struct or map. - data = t.lookup(st, data, elem) - if !data.IsValid() { - return reflect.Value{} - } - } - return indirectPtr(data, numStars) -} - -// Is there no data to look at? -func empty(v reflect.Value) bool { - v = indirect(v) - if !v.IsValid() { - return true - } - switch v.Kind() { - case reflect.Bool: - return v.Bool() == false - case reflect.String: - return v.String() == "" - case reflect.Struct: - return false - case reflect.Map: - return false - case reflect.Array: - return v.Len() == 0 - case reflect.Slice: - return v.Len() == 0 - } - return false -} - -// Look up a variable or method, up through the parent if necessary. -func (t *Template) varValue(name string, st *state) reflect.Value { - field := t.findVar(st, name) - if !field.IsValid() { - if st.parent == nil { - t.execError(st, t.linenum, "name not found: %s in type %s", name, st.data.Type()) - } - return t.varValue(name, st.parent) - } - return field -} - -func (t *Template) format(wr io.Writer, fmt string, val []interface{}, v *variableElement, st *state) { - fn := t.formatter(fmt) - if fn == nil { - t.execError(st, v.linenum, "missing formatter %s for variable", fmt) - } - fn(wr, fmt, val...) -} - -// Evaluate a variable, looking up through the parent if necessary. -// If it has a formatter attached ({var|formatter}) run that too. -func (t *Template) writeVariable(v *variableElement, st *state) { - // Resolve field names - val := make([]interface{}, len(v.args)) - for i, arg := range v.args { - if name, ok := arg.(fieldName); ok { - val[i] = t.varValue(string(name), st).Interface() - } else { - val[i] = arg - } - } - for i, fmt := range v.fmts[:len(v.fmts)-1] { - b := &st.buf[i&1] - b.Reset() - t.format(b, fmt, val, v, st) - val = val[0:1] - val[0] = b.Bytes() - } - t.format(st.wr, v.fmts[len(v.fmts)-1], val, v, st) -} - -// Execute element i. Return next index to execute. -func (t *Template) executeElement(i int, st *state) int { - switch elem := t.elems[i].(type) { - case *textElement: - st.wr.Write(elem.text) - return i + 1 - case *literalElement: - st.wr.Write(elem.text) - return i + 1 - case *variableElement: - t.writeVariable(elem, st) - return i + 1 - case *sectionElement: - t.executeSection(elem, st) - return elem.end - case *repeatedElement: - t.executeRepeated(elem, st) - return elem.end - } - e := t.elems[i] - t.execError(st, 0, "internal error: bad directive in execute: %v %T\n", reflect.ValueOf(e).Interface(), e) - return 0 -} - -// Execute the template. -func (t *Template) execute(start, end int, st *state) { - for i := start; i < end; { - i = t.executeElement(i, st) - } -} - -// Execute a .section -func (t *Template) executeSection(s *sectionElement, st *state) { - // Find driver data for this section. It must be in the current struct. - field := t.varValue(s.field, st) - if !field.IsValid() { - t.execError(st, s.linenum, ".section: cannot find field %s in %s", s.field, st.data.Type()) - } - st = st.clone(field) - start, end := s.start, s.or - if !empty(field) { - // Execute the normal block. - if end < 0 { - end = s.end - } - } else { - // Execute the .or block. If it's missing, do nothing. - start, end = s.or, s.end - if start < 0 { - return - } - } - for i := start; i < end; { - i = t.executeElement(i, st) - } -} - -// Return the result of calling the Iter method on v, or nil. -func iter(v reflect.Value) reflect.Value { - for j := 0; j < v.Type().NumMethod(); j++ { - mth := v.Type().Method(j) - fv := v.Method(j) - ft := fv.Type() - // TODO(rsc): NumIn() should return 0 here, because ft is from a curried FuncValue. - if mth.Name != "Iter" || ft.NumIn() != 1 || ft.NumOut() != 1 { - continue - } - ct := ft.Out(0) - if ct.Kind() != reflect.Chan || - ct.ChanDir()&reflect.RecvDir == 0 { - continue - } - return fv.Call(nil)[0] - } - return reflect.Value{} -} - -// Execute a .repeated section -func (t *Template) executeRepeated(r *repeatedElement, st *state) { - // Find driver data for this section. It must be in the current struct. - field := t.varValue(r.field, st) - if !field.IsValid() { - t.execError(st, r.linenum, ".repeated: cannot find field %s in %s", r.field, st.data.Type()) - } - field = indirect(field) - - start, end := r.start, r.or - if end < 0 { - end = r.end - } - if r.altstart >= 0 { - end = r.altstart - } - first := true - - // Code common to all the loops. - loopBody := func(newst *state) { - // .alternates between elements - if !first && r.altstart >= 0 { - for i := r.altstart; i < r.altend; { - i = t.executeElement(i, newst) - } - } - first = false - for i := start; i < end; { - i = t.executeElement(i, newst) - } - } - - if array := field; array.Kind() == reflect.Array || array.Kind() == reflect.Slice { - for j := 0; j < array.Len(); j++ { - loopBody(st.clone(array.Index(j))) - } - } else if m := field; m.Kind() == reflect.Map { - for _, key := range m.MapKeys() { - loopBody(st.clone(m.MapIndex(key))) - } - } else if ch := iter(field); ch.IsValid() { - for { - e, ok := ch.Recv() - if !ok { - break - } - loopBody(st.clone(e)) - } - } else { - t.execError(st, r.linenum, ".repeated: cannot repeat %s (type %s)", - r.field, field.Type()) - } - - if first { - // Empty. Execute the .or block, once. If it's missing, do nothing. - start, end := r.or, r.end - if start >= 0 { - newst := st.clone(field) - for i := start; i < end; { - i = t.executeElement(i, newst) - } - } - return - } -} - -// A valid delimiter must contain no space and be non-empty. -func validDelim(d []byte) bool { - if len(d) == 0 { - return false - } - for _, c := range d { - if isSpace(c) { - return false - } - } - return true -} diff --git a/src/pkg/old/template/format.go b/src/pkg/old/template/format.go deleted file mode 100644 index 9156b080816..00000000000 --- a/src/pkg/old/template/format.go +++ /dev/null @@ -1,77 +0,0 @@ -// Copyright 2009 The Go Authors. All rights reserved. -// Use of this source code is governed by a BSD-style -// license that can be found in the LICENSE file. - -// Template library: default formatters - -package template - -import ( - "bytes" - "fmt" - "io" -) - -// StringFormatter formats into the default string representation. -// It is stored under the name "str" and is the default formatter. -// You can override the default formatter by storing your default -// under the name "" in your custom formatter map. -func StringFormatter(w io.Writer, format string, value ...interface{}) { - if len(value) == 1 { - if b, ok := value[0].([]byte); ok { - w.Write(b) - return - } - } - fmt.Fprint(w, value...) -} - -var ( - esc_quot = []byte(""") // shorter than """ - esc_apos = []byte("'") // shorter than "'" - esc_amp = []byte("&") - esc_lt = []byte("<") - esc_gt = []byte(">") -) - -// HTMLEscape writes to w the properly escaped HTML equivalent -// of the plain text data s. -func HTMLEscape(w io.Writer, s []byte) { - var esc []byte - last := 0 - for i, c := range s { - switch c { - case '"': - esc = esc_quot - case '\'': - esc = esc_apos - case '&': - esc = esc_amp - case '<': - esc = esc_lt - case '>': - esc = esc_gt - default: - continue - } - w.Write(s[last:i]) - w.Write(esc) - last = i + 1 - } - w.Write(s[last:]) -} - -// HTMLFormatter formats arbitrary values for HTML -func HTMLFormatter(w io.Writer, format string, value ...interface{}) { - ok := false - var b []byte - if len(value) == 1 { - b, ok = value[0].([]byte) - } - if !ok { - var buf bytes.Buffer - fmt.Fprint(&buf, value...) - b = buf.Bytes() - } - HTMLEscape(w, b) -} diff --git a/src/pkg/old/template/parse.go b/src/pkg/old/template/parse.go deleted file mode 100644 index e1bfa472499..00000000000 --- a/src/pkg/old/template/parse.go +++ /dev/null @@ -1,742 +0,0 @@ -// Copyright 2009 The Go Authors. All rights reserved. -// Use of this source code is governed by a BSD-style -// license that can be found in the LICENSE file. - -// Code to parse a template. - -package template - -import ( - "fmt" - "io" - "io/ioutil" - "reflect" - "strconv" - "strings" - "unicode" - "unicode/utf8" -) - -// Errors returned during parsing and execution. Users may extract the information and reformat -// if they desire. -type Error struct { - Line int - Msg string -} - -func (e *Error) Error() string { return fmt.Sprintf("line %d: %s", e.Line, e.Msg) } - -// checkError is a deferred function to turn a panic with type *Error into a plain error return. -// Other panics are unexpected and so are re-enabled. -func checkError(error *error) { - if v := recover(); v != nil { - if e, ok := v.(*Error); ok { - *error = e - } else { - // runtime errors should crash - panic(v) - } - } -} - -// Most of the literals are aces. -var lbrace = []byte{'{'} -var rbrace = []byte{'}'} -var space = []byte{' '} -var tab = []byte{'\t'} - -// The various types of "tokens", which are plain text or (usually) brace-delimited descriptors -const ( - tokAlternates = iota - tokComment - tokEnd - tokLiteral - tokOr - tokRepeated - tokSection - tokText - tokVariable -) - -// FormatterMap is the type describing the mapping from formatter -// names to the functions that implement them. -type FormatterMap map[string]func(io.Writer, string, ...interface{}) - -// Built-in formatters. -var builtins = FormatterMap{ - "html": HTMLFormatter, - "str": StringFormatter, - "": StringFormatter, -} - -// The parsed state of a template is a vector of xxxElement structs. -// Sections have line numbers so errors can be reported better during execution. - -// Plain text. -type textElement struct { - text []byte -} - -// A literal such as .meta-left or .meta-right -type literalElement struct { - text []byte -} - -// A variable invocation to be evaluated -type variableElement struct { - linenum int - args []interface{} // The fields and literals in the invocation. - fmts []string // Names of formatters to apply. len(fmts) > 0 -} - -// A variableElement arg to be evaluated as a field name -type fieldName string - -// A .section block, possibly with a .or -type sectionElement struct { - linenum int // of .section itself - field string // cursor field for this block - start int // first element - or int // first element of .or block - end int // one beyond last element -} - -// A .repeated block, possibly with a .or and a .alternates -type repeatedElement struct { - sectionElement // It has the same structure... - altstart int // ... except for alternates - altend int -} - -// Template is the type that represents a template definition. -// It is unchanged after parsing. -type Template struct { - fmap FormatterMap // formatters for variables - // Used during parsing: - ldelim, rdelim []byte // delimiters; default {} - buf []byte // input text to process - p int // position in buf - linenum int // position in input - // Parsed results: - elems []interface{} -} - -// New creates a new template with the specified formatter map (which -// may be nil) to define auxiliary functions for formatting variables. -func New(fmap FormatterMap) *Template { - t := new(Template) - t.fmap = fmap - t.ldelim = lbrace - t.rdelim = rbrace - t.elems = make([]interface{}, 0, 16) - return t -} - -// Report error and stop executing. The line number must be provided explicitly. -func (t *Template) execError(st *state, line int, err string, args ...interface{}) { - panic(&Error{line, fmt.Sprintf(err, args...)}) -} - -// Report error, panic to terminate parsing. -// The line number comes from the template state. -func (t *Template) parseError(err string, args ...interface{}) { - panic(&Error{t.linenum, fmt.Sprintf(err, args...)}) -} - -// Is this an exported - upper case - name? -func isExported(name string) bool { - r, _ := utf8.DecodeRuneInString(name) - return unicode.IsUpper(r) -} - -// -- Lexical analysis - -// Is c a space character? -func isSpace(c uint8) bool { return c == ' ' || c == '\t' || c == '\r' || c == '\n' } - -// Safely, does s[n:n+len(t)] == t? -func equal(s []byte, n int, t []byte) bool { - b := s[n:] - if len(t) > len(b) { // not enough space left for a match. - return false - } - for i, c := range t { - if c != b[i] { - return false - } - } - return true -} - -// isQuote returns true if c is a string- or character-delimiting quote character. -func isQuote(c byte) bool { - return c == '"' || c == '`' || c == '\'' -} - -// endQuote returns the end quote index for the quoted string that -// starts at n, or -1 if no matching end quote is found before the end -// of the line. -func endQuote(s []byte, n int) int { - quote := s[n] - for n++; n < len(s); n++ { - switch s[n] { - case '\\': - if quote == '"' || quote == '\'' { - n++ - } - case '\n': - return -1 - case quote: - return n - } - } - return -1 -} - -// nextItem returns the next item from the input buffer. If the returned -// item is empty, we are at EOF. The item will be either a -// delimited string or a non-empty string between delimited -// strings. Tokens stop at (but include, if plain text) a newline. -// Action tokens on a line by themselves drop any space on -// either side, up to and including the newline. -func (t *Template) nextItem() []byte { - startOfLine := t.p == 0 || t.buf[t.p-1] == '\n' - start := t.p - var i int - newline := func() { - t.linenum++ - i++ - } - // Leading space up to but not including newline - for i = start; i < len(t.buf); i++ { - if t.buf[i] == '\n' || !isSpace(t.buf[i]) { - break - } - } - leadingSpace := i > start - // What's left is nothing, newline, delimited string, or plain text - switch { - case i == len(t.buf): - // EOF; nothing to do - case t.buf[i] == '\n': - newline() - case equal(t.buf, i, t.ldelim): - left := i // Start of left delimiter. - right := -1 // Will be (immediately after) right delimiter. - haveText := false // Delimiters contain text. - i += len(t.ldelim) - // Find the end of the action. - for ; i < len(t.buf); i++ { - if t.buf[i] == '\n' { - break - } - if isQuote(t.buf[i]) { - i = endQuote(t.buf, i) - if i == -1 { - t.parseError("unmatched quote") - return nil - } - continue - } - if equal(t.buf, i, t.rdelim) { - i += len(t.rdelim) - right = i - break - } - haveText = true - } - if right < 0 { - t.parseError("unmatched opening delimiter") - return nil - } - // Is this a special action (starts with '.' or '#') and the only thing on the line? - if startOfLine && haveText { - firstChar := t.buf[left+len(t.ldelim)] - if firstChar == '.' || firstChar == '#' { - // It's special and the first thing on the line. Is it the last? - for j := right; j < len(t.buf) && isSpace(t.buf[j]); j++ { - if t.buf[j] == '\n' { - // Yes it is. Drop the surrounding space and return the {.foo} - t.linenum++ - t.p = j + 1 - return t.buf[left:right] - } - } - } - } - // No it's not. If there's leading space, return that. - if leadingSpace { - // not trimming space: return leading space if there is some. - t.p = left - return t.buf[start:left] - } - // Return the word, leave the trailing space. - start = left - break - default: - for ; i < len(t.buf); i++ { - if t.buf[i] == '\n' { - newline() - break - } - if equal(t.buf, i, t.ldelim) { - break - } - } - } - item := t.buf[start:i] - t.p = i - return item -} - -// Turn a byte array into a space-split array of strings, -// taking into account quoted strings. -func words(buf []byte) []string { - s := make([]string, 0, 5) - for i := 0; i < len(buf); { - // One word per loop - for i < len(buf) && isSpace(buf[i]) { - i++ - } - if i == len(buf) { - break - } - // Got a word - start := i - if isQuote(buf[i]) { - i = endQuote(buf, i) - if i < 0 { - i = len(buf) - } else { - i++ - } - } - // Even with quotes, break on space only. This handles input - // such as {""|} and catches quoting mistakes. - for i < len(buf) && !isSpace(buf[i]) { - i++ - } - s = append(s, string(buf[start:i])) - } - return s -} - -// Analyze an item and return its token type and, if it's an action item, an array of -// its constituent words. -func (t *Template) analyze(item []byte) (tok int, w []string) { - // item is known to be non-empty - if !equal(item, 0, t.ldelim) { // doesn't start with left delimiter - tok = tokText - return - } - if !equal(item, len(item)-len(t.rdelim), t.rdelim) { // doesn't end with right delimiter - t.parseError("internal error: unmatched opening delimiter") // lexing should prevent this - return - } - if len(item) <= len(t.ldelim)+len(t.rdelim) { // no contents - t.parseError("empty directive") - return - } - // Comment - if item[len(t.ldelim)] == '#' { - tok = tokComment - return - } - // Split into words - w = words(item[len(t.ldelim) : len(item)-len(t.rdelim)]) // drop final delimiter - if len(w) == 0 { - t.parseError("empty directive") - return - } - first := w[0] - if first[0] != '.' { - tok = tokVariable - return - } - if len(first) > 1 && first[1] >= '0' && first[1] <= '9' { - // Must be a float. - tok = tokVariable - return - } - switch first { - case ".meta-left", ".meta-right", ".space", ".tab": - tok = tokLiteral - return - case ".or": - tok = tokOr - return - case ".end": - tok = tokEnd - return - case ".section": - if len(w) != 2 { - t.parseError("incorrect fields for .section: %s", item) - return - } - tok = tokSection - return - case ".repeated": - if len(w) != 3 || w[1] != "section" { - t.parseError("incorrect fields for .repeated: %s", item) - return - } - tok = tokRepeated - return - case ".alternates": - if len(w) != 2 || w[1] != "with" { - t.parseError("incorrect fields for .alternates: %s", item) - return - } - tok = tokAlternates - return - } - t.parseError("bad directive: %s", item) - return -} - -// formatter returns the Formatter with the given name in the Template, or nil if none exists. -func (t *Template) formatter(name string) func(io.Writer, string, ...interface{}) { - if t.fmap != nil { - if fn := t.fmap[name]; fn != nil { - return fn - } - } - return builtins[name] -} - -// -- Parsing - -// newVariable allocates a new variable-evaluation element. -func (t *Template) newVariable(words []string) *variableElement { - formatters := extractFormatters(words) - args := make([]interface{}, len(words)) - - // Build argument list, processing any literals - for i, word := range words { - var lerr error - switch word[0] { - case '"', '`', '\'': - v, err := strconv.Unquote(word) - if err == nil && word[0] == '\'' { - args[i], _ = utf8.DecodeRuneInString(v) - } else { - args[i], lerr = v, err - } - - case '.', '+', '-', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9': - v, err := strconv.ParseInt(word, 0, 64) - if err == nil { - args[i] = v - } else { - v, err := strconv.ParseFloat(word, 64) - args[i], lerr = v, err - } - - default: - args[i] = fieldName(word) - } - if lerr != nil { - t.parseError("invalid literal: %q: %s", word, lerr) - } - } - - // We could remember the function address here and avoid the lookup later, - // but it's more dynamic to let the user change the map contents underfoot. - // We do require the name to be present, though. - - // Is it in user-supplied map? - for _, f := range formatters { - if t.formatter(f) == nil { - t.parseError("unknown formatter: %q", f) - } - } - - return &variableElement{t.linenum, args, formatters} -} - -// extractFormatters extracts a list of formatters from words. -// After the final space-separated argument in a variable, formatters may be -// specified separated by pipe symbols. For example: {a b c|d|e} -// The words parameter still has the formatters joined by '|' in the last word. -// extractFormatters splits formatters, replaces the last word with the content -// found before the first '|' within it, and returns the formatters obtained. -// If no formatters are found in words, the default formatter is returned. -func extractFormatters(words []string) (formatters []string) { - // "" is the default formatter. - formatters = []string{""} - if len(words) == 0 { - return - } - var bar int - lastWord := words[len(words)-1] - if isQuote(lastWord[0]) { - end := endQuote([]byte(lastWord), 0) - if end < 0 || end+1 == len(lastWord) || lastWord[end+1] != '|' { - return - } - bar = end + 1 - } else { - bar = strings.IndexRune(lastWord, '|') - if bar < 0 { - return - } - } - words[len(words)-1] = lastWord[0:bar] - formatters = strings.Split(lastWord[bar+1:], "|") - return -} - -// Grab the next item. If it's simple, just append it to the template. -// Otherwise return its details. -func (t *Template) parseSimple(item []byte) (done bool, tok int, w []string) { - tok, w = t.analyze(item) - done = true // assume for simplicity - switch tok { - case tokComment: - return - case tokText: - t.elems = append(t.elems, &textElement{item}) - return - case tokLiteral: - switch w[0] { - case ".meta-left": - t.elems = append(t.elems, &literalElement{t.ldelim}) - case ".meta-right": - t.elems = append(t.elems, &literalElement{t.rdelim}) - case ".space": - t.elems = append(t.elems, &literalElement{space}) - case ".tab": - t.elems = append(t.elems, &literalElement{tab}) - default: - t.parseError("internal error: unknown literal: %s", w[0]) - } - return - case tokVariable: - t.elems = append(t.elems, t.newVariable(w)) - return - } - return false, tok, w -} - -// parseRepeated and parseSection are mutually recursive - -func (t *Template) parseRepeated(words []string) *repeatedElement { - r := new(repeatedElement) - t.elems = append(t.elems, r) - r.linenum = t.linenum - r.field = words[2] - // Scan section, collecting true and false (.or) blocks. - r.start = len(t.elems) - r.or = -1 - r.altstart = -1 - r.altend = -1 -Loop: - for { - item := t.nextItem() - if len(item) == 0 { - t.parseError("missing .end for .repeated section") - break - } - done, tok, w := t.parseSimple(item) - if done { - continue - } - switch tok { - case tokEnd: - break Loop - case tokOr: - if r.or >= 0 { - t.parseError("extra .or in .repeated section") - break Loop - } - r.altend = len(t.elems) - r.or = len(t.elems) - case tokSection: - t.parseSection(w) - case tokRepeated: - t.parseRepeated(w) - case tokAlternates: - if r.altstart >= 0 { - t.parseError("extra .alternates in .repeated section") - break Loop - } - if r.or >= 0 { - t.parseError(".alternates inside .or block in .repeated section") - break Loop - } - r.altstart = len(t.elems) - default: - t.parseError("internal error: unknown repeated section item: %s", item) - break Loop - } - } - if r.altend < 0 { - r.altend = len(t.elems) - } - r.end = len(t.elems) - return r -} - -func (t *Template) parseSection(words []string) *sectionElement { - s := new(sectionElement) - t.elems = append(t.elems, s) - s.linenum = t.linenum - s.field = words[1] - // Scan section, collecting true and false (.or) blocks. - s.start = len(t.elems) - s.or = -1 -Loop: - for { - item := t.nextItem() - if len(item) == 0 { - t.parseError("missing .end for .section") - break - } - done, tok, w := t.parseSimple(item) - if done { - continue - } - switch tok { - case tokEnd: - break Loop - case tokOr: - if s.or >= 0 { - t.parseError("extra .or in .section") - break Loop - } - s.or = len(t.elems) - case tokSection: - t.parseSection(w) - case tokRepeated: - t.parseRepeated(w) - case tokAlternates: - t.parseError(".alternates not in .repeated") - default: - t.parseError("internal error: unknown section item: %s", item) - } - } - s.end = len(t.elems) - return s -} - -func (t *Template) parse() { - for { - item := t.nextItem() - if len(item) == 0 { - break - } - done, tok, w := t.parseSimple(item) - if done { - continue - } - switch tok { - case tokOr, tokEnd, tokAlternates: - t.parseError("unexpected %s", w[0]) - case tokSection: - t.parseSection(w) - case tokRepeated: - t.parseRepeated(w) - default: - t.parseError("internal error: bad directive in parse: %s", item) - } - } -} - -// -- Execution - -// -- Public interface - -// Parse initializes a Template by parsing its definition. The string -// s contains the template text. If any errors occur, Parse returns -// the error. -func (t *Template) Parse(s string) (err error) { - if t.elems == nil { - return &Error{1, "template not allocated with New"} - } - if !validDelim(t.ldelim) || !validDelim(t.rdelim) { - return &Error{1, fmt.Sprintf("bad delimiter strings %q %q", t.ldelim, t.rdelim)} - } - defer checkError(&err) - t.buf = []byte(s) - t.p = 0 - t.linenum = 1 - t.parse() - return nil -} - -// ParseFile is like Parse but reads the template definition from the -// named file. -func (t *Template) ParseFile(filename string) (err error) { - b, err := ioutil.ReadFile(filename) - if err != nil { - return err - } - return t.Parse(string(b)) -} - -// Execute applies a parsed template to the specified data object, -// generating output to wr. -func (t *Template) Execute(wr io.Writer, data interface{}) (err error) { - // Extract the driver data. - val := reflect.ValueOf(data) - defer checkError(&err) - t.p = 0 - t.execute(0, len(t.elems), &state{parent: nil, data: val, wr: wr}) - return nil -} - -// SetDelims sets the left and right delimiters for operations in the -// template. They are validated during parsing. They could be -// validated here but it's better to keep the routine simple. The -// delimiters are very rarely invalid and Parse has the necessary -// error-handling interface already. -func (t *Template) SetDelims(left, right string) { - t.ldelim = []byte(left) - t.rdelim = []byte(right) -} - -// Parse creates a Template with default parameters (such as {} for -// metacharacters). The string s contains the template text while -// the formatter map fmap, which may be nil, defines auxiliary functions -// for formatting variables. The template is returned. If any errors -// occur, err will be non-nil. -func Parse(s string, fmap FormatterMap) (t *Template, err error) { - t = New(fmap) - err = t.Parse(s) - if err != nil { - t = nil - } - return -} - -// ParseFile is a wrapper function that creates a Template with default -// parameters (such as {} for metacharacters). The filename identifies -// a file containing the template text, while the formatter map fmap, which -// may be nil, defines auxiliary functions for formatting variables. -// The template is returned. If any errors occur, err will be non-nil. -func ParseFile(filename string, fmap FormatterMap) (t *Template, err error) { - b, err := ioutil.ReadFile(filename) - if err != nil { - return nil, err - } - return Parse(string(b), fmap) -} - -// MustParse is like Parse but panics if the template cannot be parsed. -func MustParse(s string, fmap FormatterMap) *Template { - t, err := Parse(s, fmap) - if err != nil { - panic("template.MustParse error: " + err.Error()) - } - return t -} - -// MustParseFile is like ParseFile but panics if the file cannot be read -// or the template cannot be parsed. -func MustParseFile(filename string, fmap FormatterMap) *Template { - b, err := ioutil.ReadFile(filename) - if err != nil { - panic("template.MustParseFile error: " + err.Error()) - } - return MustParse(string(b), fmap) -} diff --git a/src/pkg/old/template/template_test.go b/src/pkg/old/template/template_test.go deleted file mode 100644 index 854a548e5aa..00000000000 --- a/src/pkg/old/template/template_test.go +++ /dev/null @@ -1,810 +0,0 @@ -// Copyright 2009 The Go Authors. All rights reserved. -// Use of this source code is governed by a BSD-style -// license that can be found in the LICENSE file. - -package template - -import ( - "bytes" - "encoding/json" - "fmt" - "io" - "io/ioutil" - "os" - "strings" - "testing" -) - -type Test struct { - in, out, err string -} - -type T struct { - Item string - Value string -} - -type U struct { - Mp map[string]int -} - -type S struct { - Header string - HeaderPtr *string - Integer int - IntegerPtr *int - NilPtr *int - InnerT T - InnerPointerT *T - Data []T - Pdata []*T - Empty []*T - Emptystring string - Null []*T - Vec []interface{} - True bool - False bool - Mp map[string]string - JSON interface{} - Innermap U - Stringmap map[string]string - Ptrmap map[string]*string - Iface interface{} - Ifaceptr interface{} -} - -func (s *S) PointerMethod() string { return "ptrmethod!" } - -func (s S) ValueMethod() string { return "valmethod!" } - -var t1 = T{"ItemNumber1", "ValueNumber1"} -var t2 = T{"ItemNumber2", "ValueNumber2"} - -func uppercase(v interface{}) string { - s := v.(string) - t := "" - for i := 0; i < len(s); i++ { - c := s[i] - if 'a' <= c && c <= 'z' { - c = c + 'A' - 'a' - } - t += string(c) - } - return t -} - -func plus1(v interface{}) string { - i := v.(int) - return fmt.Sprint(i + 1) -} - -func writer(f func(interface{}) string) func(io.Writer, string, ...interface{}) { - return func(w io.Writer, format string, v ...interface{}) { - if len(v) != 1 { - panic("test writer expected one arg") - } - io.WriteString(w, f(v[0])) - } -} - -func multiword(w io.Writer, format string, value ...interface{}) { - for _, v := range value { - fmt.Fprintf(w, "<%v>", v) - } -} - -func printf(w io.Writer, format string, v ...interface{}) { - io.WriteString(w, fmt.Sprintf(v[0].(string), v[1:]...)) -} - -var formatters = FormatterMap{ - "uppercase": writer(uppercase), - "+1": writer(plus1), - "multiword": multiword, - "printf": printf, -} - -var tests = []*Test{ - // Simple - {"", "", ""}, - {"abc", "abc", ""}, - {"abc\ndef\n", "abc\ndef\n", ""}, - {" {.meta-left} \n", "{", ""}, - {" {.meta-right} \n", "}", ""}, - {" {.space} \n", " ", ""}, - {" {.tab} \n", "\t", ""}, - {" {#comment} \n", "", ""}, - {"\tSome Text\t\n", "\tSome Text\t\n", ""}, - {" {.meta-right} {.meta-right} {.meta-right} \n", " } } } \n", ""}, - - // Variables at top level - { - in: "{Header}={Integer}\n", - - out: "Header=77\n", - }, - - { - in: "Pointers: {*HeaderPtr}={*IntegerPtr}\n", - - out: "Pointers: Header=77\n", - }, - - { - in: "Stars but not pointers: {*Header}={*Integer}\n", - - out: "Stars but not pointers: Header=77\n", - }, - - { - in: "nil pointer: {*NilPtr}={*Integer}\n", - - out: "nil pointer: =77\n", - }, - - { - in: `{"Strings" ":"} {""} {"|"} {"\t\u0123 \x23\\"} {"\"}{\\"}`, - - out: "Strings: | \t\u0123 \x23\\ \"}{\\", - }, - - { - in: "{`Raw strings` `:`} {``} {`|`} {`\\t\\u0123 \\x23\\`} {`}{\\`}", - - out: "Raw strings: | \\t\\u0123 \\x23\\ }{\\", - }, - - { - in: "Characters: {'a'} {'\\u0123'} {' '} {'{'} {'|'} {'}'}", - - out: "Characters: 97 291 32 123 124 125", - }, - - { - in: "Integers: {1} {-2} {+42} {0777} {0x0a}", - - out: "Integers: 1 -2 42 511 10", - }, - - { - in: "Floats: {.5} {-.5} {1.1} {-2.2} {+42.1} {1e10} {1.2e-3} {1.2e3} {-1.2e3}", - - out: "Floats: 0.5 -0.5 1.1 -2.2 42.1 1e+10 0.0012 1200 -1200", - }, - - // Method at top level - { - in: "ptrmethod={PointerMethod}\n", - - out: "ptrmethod=ptrmethod!\n", - }, - - { - in: "valmethod={ValueMethod}\n", - - out: "valmethod=valmethod!\n", - }, - - // Section - { - in: "{.section Data }\n" + - "some text for the section\n" + - "{.end}\n", - - out: "some text for the section\n", - }, - { - in: "{.section Data }\n" + - "{Header}={Integer}\n" + - "{.end}\n", - - out: "Header=77\n", - }, - { - in: "{.section Pdata }\n" + - "{Header}={Integer}\n" + - "{.end}\n", - - out: "Header=77\n", - }, - { - in: "{.section Pdata }\n" + - "data present\n" + - "{.or}\n" + - "data not present\n" + - "{.end}\n", - - out: "data present\n", - }, - { - in: "{.section Empty }\n" + - "data present\n" + - "{.or}\n" + - "data not present\n" + - "{.end}\n", - - out: "data not present\n", - }, - { - in: "{.section Null }\n" + - "data present\n" + - "{.or}\n" + - "data not present\n" + - "{.end}\n", - - out: "data not present\n", - }, - { - in: "{.section Pdata }\n" + - "{Header}={Integer}\n" + - "{.section @ }\n" + - "{Header}={Integer}\n" + - "{.end}\n" + - "{.end}\n", - - out: "Header=77\n" + - "Header=77\n", - }, - - { - in: "{.section Data}{.end} {Header}\n", - - out: " Header\n", - }, - - { - in: "{.section Integer}{@}{.end}", - - out: "77", - }, - - // Repeated - { - in: "{.section Pdata }\n" + - "{.repeated section @ }\n" + - "{Item}={Value}\n" + - "{.end}\n" + - "{.end}\n", - - out: "ItemNumber1=ValueNumber1\n" + - "ItemNumber2=ValueNumber2\n", - }, - { - in: "{.section Pdata }\n" + - "{.repeated section @ }\n" + - "{Item}={Value}\n" + - "{.or}\n" + - "this should not appear\n" + - "{.end}\n" + - "{.end}\n", - - out: "ItemNumber1=ValueNumber1\n" + - "ItemNumber2=ValueNumber2\n", - }, - { - in: "{.section @ }\n" + - "{.repeated section Empty }\n" + - "{Item}={Value}\n" + - "{.or}\n" + - "this should appear: empty field\n" + - "{.end}\n" + - "{.end}\n", - - out: "this should appear: empty field\n", - }, - { - in: "{.repeated section Pdata }\n" + - "{Item}\n" + - "{.alternates with}\n" + - "is\nover\nmultiple\nlines\n" + - "{.end}\n", - - out: "ItemNumber1\n" + - "is\nover\nmultiple\nlines\n" + - "ItemNumber2\n", - }, - { - in: "{.repeated section Pdata }\n" + - "{Item}\n" + - "{.alternates with}\n" + - "is\nover\nmultiple\nlines\n" + - " {.end}\n", - - out: "ItemNumber1\n" + - "is\nover\nmultiple\nlines\n" + - "ItemNumber2\n", - }, - { - in: "{.section Pdata }\n" + - "{.repeated section @ }\n" + - "{Item}={Value}\n" + - "{.alternates with}DIVIDER\n" + - "{.or}\n" + - "this should not appear\n" + - "{.end}\n" + - "{.end}\n", - - out: "ItemNumber1=ValueNumber1\n" + - "DIVIDER\n" + - "ItemNumber2=ValueNumber2\n", - }, - { - in: "{.repeated section Vec }\n" + - "{@}\n" + - "{.end}\n", - - out: "elt1\n" + - "elt2\n", - }, - // Same but with a space before {.end}: was a bug. - { - in: "{.repeated section Vec }\n" + - "{@} {.end}\n", - - out: "elt1 elt2 \n", - }, - { - in: "{.repeated section Integer}{.end}", - - err: "line 1: .repeated: cannot repeat Integer (type int)", - }, - - // Nested names - { - in: "{.section @ }\n" + - "{InnerT.Item}={InnerT.Value}\n" + - "{.end}", - - out: "ItemNumber1=ValueNumber1\n", - }, - { - in: "{.section @ }\n" + - "{InnerT.Item}={.section InnerT}{.section Value}{@}{.end}{.end}\n" + - "{.end}", - - out: "ItemNumber1=ValueNumber1\n", - }, - - { - in: "{.section Emptystring}emptystring{.end}\n" + - "{.section Header}header{.end}\n", - - out: "\nheader\n", - }, - - { - in: "{.section True}1{.or}2{.end}\n" + - "{.section False}3{.or}4{.end}\n", - - out: "1\n4\n", - }, - - // Maps - - { - in: "{Mp.mapkey}\n", - - out: "Ahoy!\n", - }, - { - in: "{Innermap.Mp.innerkey}\n", - - out: "55\n", - }, - { - in: "{.section Innermap}{.section Mp}{innerkey}{.end}{.end}\n", - - out: "55\n", - }, - { - in: "{.section JSON}{.repeated section maps}{a}{b}{.end}{.end}\n", - - out: "1234\n", - }, - { - in: "{Stringmap.stringkey1}\n", - - out: "stringresult\n", - }, - { - in: "{.repeated section Stringmap}\n" + - "{@}\n" + - "{.end}", - - out: "stringresult\n" + - "stringresult\n", - }, - { - in: "{.repeated section Stringmap}\n" + - "\t{@}\n" + - "{.end}", - - out: "\tstringresult\n" + - "\tstringresult\n", - }, - { - in: "{*Ptrmap.stringkey1}\n", - - out: "pointedToString\n", - }, - { - in: "{.repeated section Ptrmap}\n" + - "{*@}\n" + - "{.end}", - - out: "pointedToString\n" + - "pointedToString\n", - }, - - // Interface values - - { - in: "{Iface}", - - out: "[1 2 3]", - }, - { - in: "{.repeated section Iface}{@}{.alternates with} {.end}", - - out: "1 2 3", - }, - { - in: "{.section Iface}{@}{.end}", - - out: "[1 2 3]", - }, - { - in: "{.section Ifaceptr}{Item} {Value}{.end}", - - out: "Item Value", - }, -} - -func TestAll(t *testing.T) { - // Parse - testAll(t, func(test *Test) (*Template, error) { return Parse(test.in, formatters) }) - // ParseFile - f, err := ioutil.TempFile("", "template-test") - if err != nil { - t.Fatal(err) - } - defer func() { - name := f.Name() - f.Close() - os.Remove(name) - }() - testAll(t, func(test *Test) (*Template, error) { - err := ioutil.WriteFile(f.Name(), []byte(test.in), 0600) - if err != nil { - t.Error("unexpected write error:", err) - return nil, err - } - return ParseFile(f.Name(), formatters) - }) - // tmpl.ParseFile - testAll(t, func(test *Test) (*Template, error) { - err := ioutil.WriteFile(f.Name(), []byte(test.in), 0600) - if err != nil { - t.Error("unexpected write error:", err) - return nil, err - } - tmpl := New(formatters) - return tmpl, tmpl.ParseFile(f.Name()) - }) -} - -func testAll(t *testing.T, parseFunc func(*Test) (*Template, error)) { - s := new(S) - // initialized by hand for clarity. - s.Header = "Header" - s.HeaderPtr = &s.Header - s.Integer = 77 - s.IntegerPtr = &s.Integer - s.InnerT = t1 - s.Data = []T{t1, t2} - s.Pdata = []*T{&t1, &t2} - s.Empty = []*T{} - s.Null = nil - s.Vec = []interface{}{"elt1", "elt2"} - s.True = true - s.False = false - s.Mp = make(map[string]string) - s.Mp["mapkey"] = "Ahoy!" - json.Unmarshal([]byte(`{"maps":[{"a":1,"b":2},{"a":3,"b":4}]}`), &s.JSON) - s.Innermap.Mp = make(map[string]int) - s.Innermap.Mp["innerkey"] = 55 - s.Stringmap = make(map[string]string) - s.Stringmap["stringkey1"] = "stringresult" // the same value so repeated section is order-independent - s.Stringmap["stringkey2"] = "stringresult" - s.Ptrmap = make(map[string]*string) - x := "pointedToString" - s.Ptrmap["stringkey1"] = &x // the same value so repeated section is order-independent - s.Ptrmap["stringkey2"] = &x - s.Iface = []int{1, 2, 3} - s.Ifaceptr = &T{"Item", "Value"} - - var buf bytes.Buffer - for _, test := range tests { - buf.Reset() - tmpl, err := parseFunc(test) - if err != nil { - t.Error("unexpected parse error: ", err) - continue - } - err = tmpl.Execute(&buf, s) - if test.err == "" { - if err != nil { - t.Error("unexpected execute error:", err) - } - } else { - if err == nil { - t.Errorf("expected execute error %q, got nil", test.err) - } else if err.Error() != test.err { - t.Errorf("expected execute error %q, got %q", test.err, err.Error()) - } - } - if buf.String() != test.out { - t.Errorf("for %q: expected %q got %q", test.in, test.out, buf.String()) - } - } -} - -func TestMapDriverType(t *testing.T) { - mp := map[string]string{"footer": "Ahoy!"} - tmpl, err := Parse("template: {footer}", nil) - if err != nil { - t.Error("unexpected parse error:", err) - } - var b bytes.Buffer - err = tmpl.Execute(&b, mp) - if err != nil { - t.Error("unexpected execute error:", err) - } - s := b.String() - expect := "template: Ahoy!" - if s != expect { - t.Errorf("failed passing string as data: expected %q got %q", expect, s) - } -} - -func TestMapNoEntry(t *testing.T) { - mp := make(map[string]int) - tmpl, err := Parse("template: {notthere}!", nil) - if err != nil { - t.Error("unexpected parse error:", err) - } - var b bytes.Buffer - err = tmpl.Execute(&b, mp) - if err != nil { - t.Error("unexpected execute error:", err) - } - s := b.String() - expect := "template: 0!" - if s != expect { - t.Errorf("failed passing string as data: expected %q got %q", expect, s) - } -} - -func TestStringDriverType(t *testing.T) { - tmpl, err := Parse("template: {@}", nil) - if err != nil { - t.Error("unexpected parse error:", err) - } - var b bytes.Buffer - err = tmpl.Execute(&b, "hello") - if err != nil { - t.Error("unexpected execute error:", err) - } - s := b.String() - expect := "template: hello" - if s != expect { - t.Errorf("failed passing string as data: expected %q got %q", expect, s) - } -} - -func TestTwice(t *testing.T) { - tmpl, err := Parse("template: {@}", nil) - if err != nil { - t.Error("unexpected parse error:", err) - } - var b bytes.Buffer - err = tmpl.Execute(&b, "hello") - if err != nil { - t.Error("unexpected parse error:", err) - } - s := b.String() - expect := "template: hello" - if s != expect { - t.Errorf("failed passing string as data: expected %q got %q", expect, s) - } - err = tmpl.Execute(&b, "hello") - if err != nil { - t.Error("unexpected parse error:", err) - } - s = b.String() - expect += expect - if s != expect { - t.Errorf("failed passing string as data: expected %q got %q", expect, s) - } -} - -func TestCustomDelims(t *testing.T) { - // try various lengths. zero should catch error. - for i := 0; i < 7; i++ { - for j := 0; j < 7; j++ { - tmpl := New(nil) - // first two chars deliberately the same to test equal left and right delims - ldelim := "$!#$%^&"[0:i] - rdelim := "$*&^%$!"[0:j] - tmpl.SetDelims(ldelim, rdelim) - // if braces, this would be template: {@}{.meta-left}{.meta-right} - text := "template: " + - ldelim + "@" + rdelim + - ldelim + ".meta-left" + rdelim + - ldelim + ".meta-right" + rdelim - err := tmpl.Parse(text) - if err != nil { - if i == 0 || j == 0 { // expected - continue - } - t.Error("unexpected parse error:", err) - } else if i == 0 || j == 0 { - t.Errorf("expected parse error for empty delimiter: %d %d %q %q", i, j, ldelim, rdelim) - continue - } - var b bytes.Buffer - err = tmpl.Execute(&b, "hello") - s := b.String() - if s != "template: hello"+ldelim+rdelim { - t.Errorf("failed delim check(%q %q) %q got %q", ldelim, rdelim, text, s) - } - } - } -} - -// Test that a variable evaluates to the field itself and does not further indirection -func TestVarIndirection(t *testing.T) { - s := new(S) - // initialized by hand for clarity. - s.InnerPointerT = &t1 - - var buf bytes.Buffer - input := "{.section @}{InnerPointerT}{.end}" - tmpl, err := Parse(input, nil) - if err != nil { - t.Fatal("unexpected parse error:", err) - } - err = tmpl.Execute(&buf, s) - if err != nil { - t.Fatal("unexpected execute error:", err) - } - expect := fmt.Sprintf("%v", &t1) // output should be hex address of t1 - if buf.String() != expect { - t.Errorf("for %q: expected %q got %q", input, expect, buf.String()) - } -} - -func TestHTMLFormatterWithByte(t *testing.T) { - s := "Test string." - b := []byte(s) - var buf bytes.Buffer - HTMLFormatter(&buf, "", b) - bs := buf.String() - if bs != s { - t.Errorf("munged []byte, expected: %s got: %s", s, bs) - } -} - -type UF struct { - I int - s string -} - -func TestReferenceToUnexported(t *testing.T) { - u := &UF{3, "hello"} - var buf bytes.Buffer - input := "{.section @}{I}{s}{.end}" - tmpl, err := Parse(input, nil) - if err != nil { - t.Fatal("unexpected parse error:", err) - } - err = tmpl.Execute(&buf, u) - if err == nil { - t.Fatal("expected execute error, got none") - } - if strings.Index(err.Error(), "not exported") < 0 { - t.Fatal("expected unexported error; got", err) - } -} - -var formatterTests = []Test{ - { - in: "{Header|uppercase}={Integer|+1}\n" + - "{Header|html}={Integer|str}\n", - - out: "HEADER=78\n" + - "Header=77\n", - }, - - { - in: "{Header|uppercase}={Integer Header|multiword}\n" + - "{Header|html}={Header Integer|multiword}\n" + - "{Header|html}={Header Integer}\n", - - out: "HEADER=<77>
    \n" + - "Header=
    <77>\n" + - "Header=Header77\n", - }, - { - in: "{Raw}\n" + - "{Raw|html}\n", - - out: "a <&> b\n" + - "a <&> b\n", - }, - { - in: "{Bytes}", - out: "hello", - }, - { - in: "{Raw|uppercase|html|html}", - out: "A &lt;&amp;&gt; B", - }, - { - in: "{Header Integer|multiword|html}", - out: "<Header><77>", - }, - { - in: "{Integer|no_formatter|html}", - err: `unknown formatter: "no_formatter"`, - }, - { - in: "{Integer|||||}", // empty string is a valid formatter - out: "77", - }, - { - in: `{"%.02f 0x%02X" 1.1 10|printf}`, - out: "1.10 0x0A", - }, - { - in: `{""|}{""||}{""|printf}`, // Issue #1896. - out: "", - }, -} - -func TestFormatters(t *testing.T) { - data := map[string]interface{}{ - "Header": "Header", - "Integer": 77, - "Raw": "a <&> b", - "Bytes": []byte("hello"), - } - for _, c := range formatterTests { - tmpl, err := Parse(c.in, formatters) - if err != nil { - if c.err == "" { - t.Error("unexpected parse error:", err) - continue - } - if strings.Index(err.Error(), c.err) < 0 { - t.Errorf("unexpected error: expected %q, got %q", c.err, err.Error()) - continue - } - } else { - if c.err != "" { - t.Errorf("For %q, expected error, got none.", c.in) - continue - } - var buf bytes.Buffer - err = tmpl.Execute(&buf, data) - if err != nil { - t.Error("unexpected Execute error: ", err) - continue - } - actual := buf.String() - if actual != c.out { - t.Errorf("for %q: expected %q but got %q.", c.in, c.out, actual) - } - } - } -}