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cmd/compile/internal/syntax: add "~" operator
Change-Id: I7991103d97b97260d9615b7f5baf7ec75ad87d1f Reviewed-on: https://go-review.googlesource.com/c/go/+/307370 Trust: Robert Griesemer <gri@golang.org> Reviewed-by: Robert Findley <rfindley@google.com>
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@ -11,30 +11,31 @@ func _() {
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_ = x[Def-1]
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_ = x[Not-2]
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_ = x[Recv-3]
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_ = x[OrOr-4]
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_ = x[AndAnd-5]
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_ = x[Eql-6]
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_ = x[Neq-7]
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_ = x[Lss-8]
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_ = x[Leq-9]
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_ = x[Gtr-10]
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_ = x[Geq-11]
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_ = x[Add-12]
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_ = x[Sub-13]
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_ = x[Or-14]
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_ = x[Xor-15]
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_ = x[Mul-16]
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_ = x[Div-17]
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_ = x[Rem-18]
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_ = x[And-19]
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_ = x[AndNot-20]
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_ = x[Shl-21]
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_ = x[Shr-22]
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_ = x[Tilde-4]
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_ = x[OrOr-5]
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_ = x[AndAnd-6]
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_ = x[Eql-7]
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_ = x[Neq-8]
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_ = x[Lss-9]
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_ = x[Leq-10]
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_ = x[Gtr-11]
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_ = x[Geq-12]
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_ = x[Add-13]
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_ = x[Sub-14]
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_ = x[Or-15]
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_ = x[Xor-16]
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_ = x[Mul-17]
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_ = x[Div-18]
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_ = x[Rem-19]
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_ = x[And-20]
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_ = x[AndNot-21]
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_ = x[Shl-22]
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_ = x[Shr-23]
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}
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const _Operator_name = ":!<-||&&==!=<<=>>=+-|^*/%&&^<<>>"
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const _Operator_name = ":!<-~||&&==!=<<=>>=+-|^*/%&&^<<>>"
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var _Operator_index = [...]uint8{0, 1, 2, 4, 6, 8, 10, 12, 13, 15, 16, 18, 19, 20, 21, 22, 23, 24, 25, 26, 28, 30, 32}
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var _Operator_index = [...]uint8{0, 1, 2, 4, 5, 7, 9, 11, 13, 14, 16, 17, 19, 20, 21, 22, 23, 24, 25, 26, 27, 29, 31, 33}
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func (i Operator) String() string {
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i -= 1
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@ -343,6 +343,11 @@ redo:
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s.op, s.prec = Not, 0
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s.tok = _Operator
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case '~':
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s.nextch()
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s.op, s.prec = Tilde, 0
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s.tok = _Operator
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default:
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s.errorf("invalid character %#U", s.ch)
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s.nextch()
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@ -232,6 +232,9 @@ var sampleTokens = [...]struct {
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{_Literal, "`\r`", 0, 0},
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// operators
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{_Operator, "!", Not, 0},
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{_Operator, "~", Tilde, 0},
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{_Operator, "||", OrOr, precOrOr},
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{_Operator, "&&", AndAnd, precAndAnd},
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@ -601,7 +604,7 @@ func TestScanErrors(t *testing.T) {
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{"\U0001d7d8" /* 𝟘 */, "identifier cannot begin with digit U+1D7D8 '𝟘'", 0, 0},
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{"foo\U0001d7d8_½" /* foo𝟘_½ */, "invalid character U+00BD '½' in identifier", 0, 8 /* byte offset */},
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{"x + ~y", "invalid character U+007E '~'", 0, 4},
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{"x + #y", "invalid character U+0023 '#'", 0, 4},
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{"foo$bar = 0", "invalid character U+0024 '$'", 0, 3},
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{"0123456789", "invalid digit '8' in octal literal", 0, 8},
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{"0123456789. /* foobar", "comment not terminated", 0, 12}, // valid float constant
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@ -111,9 +111,10 @@ const (
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_ Operator = iota
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// Def is the : in :=
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Def // :
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Not // !
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Recv // <-
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Def // :
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Not // !
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Recv // <-
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Tilde // ~
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// precOrOr
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OrOr // ||
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@ -6,7 +6,10 @@
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package p
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func f(x int) {
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_ = ~x // ERROR "invalid character"
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_ = x ~ x // ERROR "invalid character" "unexpected x at end of statement"
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func _(x int) {
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_ = ~x // ERROR "unexpected ~"
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}
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func _(x int) {
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_ = x ~ x // ERROR "unexpected ~ at end of statement"
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}
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