mirror of
https://github.com/freebsd/freebsd-src
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945078deae
Relevant/interesting changes:
o parse.c: don't print null filename in stack traces
o for.c: skip syntactically wrong .for loops
o var.c: allow for :gmtime=${mtime}
add :mtime[=timestamp] where timestamp is used if stat(2)
fails, if :mtime=error stat(2) failure causes error.
o make.1: fix documentation of .PREFIX to match reality and POSIX
o unit-tests: improved var-scope-local
97 lines
3.3 KiB
Makefile
97 lines
3.3 KiB
Makefile
# $NetBSD: directive-for-errors.mk,v 1.5 2023/05/09 19:43:12 rillig Exp $
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#
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# Tests for error handling in .for loops.
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# expect-all
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# A .for directive must be followed by whitespace, everything else results
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# in a parse error.
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# expect+1: Unknown directive "fori"
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.fori in 1 2 3
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. warning <${i}>
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.endfor
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# expect-2: <>
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# expect-2: for-less endfor
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# A slash is not whitespace, therefore this is not parsed as a .for loop.
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#
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# XXX: The error message is misleading though. As of 2020-12-31, it says
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# 'Unknown directive "for"', but that directive is actually known. This is
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# because ForEval does not detect the .for loop as such, so parsing
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# continues in ParseLine > ParseDependencyLine > ParseDependency >
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# ParseDependencyTargets > ParseErrorNoDependency, and there the directive
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# name is parsed a bit differently.
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# expect+1: Unknown directive "for"
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.for/i in 1 2 3
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. warning <${i}>
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.endfor
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# expect-2: warning: <>
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# expect-2: for-less endfor
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# Before for.c 1.173 from 2023-05-08, the variable name could be an arbitrary
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# word, it only needed to be separated by whitespace. Even '$' and '\' were
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# valid variable names, which was not useful in practice.
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#
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# The '$$' was not replaced with the values '1' or '3' from the .for loop,
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# instead it was kept as-is, and when the .info directive expanded its
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# argument, each '$$' got replaced with a single '$'. The "long variable
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# expression" ${$} got replaced though, even though this would be a parse
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# error everywhere outside a .for loop.
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${:U\$}= dollar # see whether the "variable" '$' is local
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${:U\\}= backslash # see whether the "variable" '\' is local
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# expect+1: invalid character '$' in .for loop variable name
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.for $ \ in 1 2 3 4
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. info Dollar $$ ${$} $($) and backslash $\ ${\} $(\).
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.endfor
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# If there are no variables, there is no point in expanding the .for loop
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# since this would end up in an endless loop, consuming 0 of the 3 values in
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# each iteration.
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# expect+1: no iteration variables in for
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.for in 1 2 3
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# XXX: This should not be reached. It should be skipped, as already done
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# when the number of values is not a multiple of the number of variables,
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# see below.
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. warning Should not be reached.
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.endfor
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# There are 3 variables and 5 values. These 5 values cannot be split evenly
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# among the variables, therefore the loop is not expanded at all, it is
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# skipped instead.
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# expect+1: Wrong number of words (5) in .for substitution list with 3 variables
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.for a b c in 1 2 3 4 5
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. warning Should not be reached.
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.endfor
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# The list of values after the 'in' may be empty, no matter if this emptiness
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# comes from an empty expansion or even from a syntactically empty line.
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.for i in
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. info Would be reached if there were items to loop over.
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.endfor
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# A missing 'in' should parse the .for loop but skip the body.
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# expect+1: missing `in' in for
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.for i over k
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# XXX: As of 2020-12-31, this line is reached once.
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. warning Should not be reached.
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.endfor
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# A malformed modifier should be detected and skip the body of the loop.
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#
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# XXX: As of 2020-12-31, Var_Subst doesn't report any errors, therefore
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# the loop body is expanded as if no error had happened.
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# expect+1: Unknown modifier "Z"
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.for i in 1 2 ${:U3:Z} 4
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. warning Should not be reached.
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.endfor
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# expect-2: Should not be reached.
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# expect-3: Should not be reached.
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# expect-4: Should not be reached.
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