mirror of
https://github.com/freebsd/freebsd-src
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ee914ef902
Lots more unit tests and code cleanup
Relevant changes from ChangeLog
o job.c: Print -de error information when running multiple jobs
o var.c: only report error for unmatched regex subexpression
when linting (-dL) since we cannot tell when an unmatched
subexpression is an expected result.
reduce memory allocations in the modifiers ':D' and ':U'
reduce memory allocation and strlen calls in modifier ':from=to'
in the ':Q' modifier, only allocate memory if necessary
improve performance for LazyBuf
reduce debug logging and memory allocation for ${:U...}
reduce verbosity of the -dv debug logging for standard cases
fix double varname expansion in the variable modifier '::='
o var.c: avoid evaluating many modifiers in parse only mode
in strict mode (-dL) many variable references are parsed twice,
the first time just to report parse errors early, so we want to
avoid side effects and wasted effort to the extent possible.
70 lines
1.8 KiB
Makefile
70 lines
1.8 KiB
Makefile
# $NetBSD: cond-token-var.mk,v 1.6 2021/04/25 21:05:38 rillig Exp $
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#
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# Tests for variable expressions in .if conditions.
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#
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# Note the fine distinction between a variable and a variable expression.
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# A variable has a name and a value. To access the value, one writes a
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# variable expression of the form ${VAR}. This is a simple variable
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# expression. Variable expressions can get more complicated by adding
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# variable modifiers such as in ${VAR:Mpattern}.
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#
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# XXX: Strictly speaking, variable modifiers should be called expression
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# modifiers instead since they only modify the expression, not the variable.
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# Well, except for the assignment modifiers, these do indeed change the value
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# of the variable.
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DEF= defined
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# A defined variable may appear on either side of the comparison.
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.if ${DEF} == ${DEF}
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. info ok
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.else
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. error
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.endif
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# A variable that appears on the left-hand side must be defined.
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# The following line thus generates a parse error.
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.if ${UNDEF} == ${DEF}
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. error
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.endif
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# A variable that appears on the right-hand side must be defined.
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# The following line thus generates a parse error.
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.if ${DEF} == ${UNDEF}
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. error
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.endif
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# A defined variable may appear as an expression of its own.
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.if ${DEF}
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.endif
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# An undefined variable on its own generates a parse error.
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.if ${UNDEF}
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.endif
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# The :U modifier turns an undefined expression into a defined expression.
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# Since the expression is defined now, it doesn't generate any parse error.
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.if ${UNDEF:U}
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.endif
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# If the value of the variable expression is a number, it is compared against
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# zero.
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.if ${:U0}
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. error
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.endif
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.if !${:U1}
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. error
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.endif
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# If the value of the variable expression is not a number, any non-empty
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# value evaluates to true, even if there is only whitespace.
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.if ${:U}
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. error
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.endif
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.if !${:U }
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. error
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.endif
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.if !${:Uanything}
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. error
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.endif
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