e2eeea75eb
o allow env var MAKE_OBJDIR_CHECK_WRITABLE=no to skip writable checks in InitObjdir. Explicit .OBJDIR target always allows read-only directory. o More code cleanup and refactoring. o More unit tests MFC after: 1 week
82 lines
2.6 KiB
Makefile
82 lines
2.6 KiB
Makefile
# $NetBSD: dollar.mk,v 1.4 2020/11/03 18:21:36 rillig Exp $
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#
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# Test the various places where a dollar sign can appear and
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# see what happens. There are lots of surprises here.
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#
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LIST= plain 'single' "double" 'mix'"ed" back\ slashed
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WORD= word
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DOLLAR1= $
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DOLLAR2= $$
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DOLLAR4= $$$$
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X= VAR_X
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DOLLAR_XY= $$XY
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DOLLAR_AXY= $$AXY
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H= @header() { printf '\n%s\n\n' "$$*"; }; header
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T= @testcase() { printf '%23s => <%s>\n' "$$@"; }; testcase
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C= @comment() { printf '%s\n' "$$*"; }; comment
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# These variable values are not accessed.
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# The trailing dollar in the '1 dollar literal eol' test case accesses
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# the empty variable instead, which is always guaranteed to be empty.
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${:U }= space-var-value
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${:U${.newline}}= newline-var-value
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# But this one is accessed.
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${:U'}= single-quote-var-value'
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all:
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$H 'Printing dollar from literals and variables'
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$C 'To survive the parser, a dollar sign must be doubled.'
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$T '1 dollar literal' '$'
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$T '1 dollar literal eol' ''$
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$T '2 dollar literal' '$$'
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$T '4 dollar literal' '$$$$'
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$C 'Some hungry part of make eats all the dollars after a :U modifier.'
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$T '1 dollar default' ''${:U$:Q}
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$T '2 dollar default' ''${:U$$:Q}
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$T '4 dollar default' ''${:U$$$$:Q}
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$C 'This works as expected.'
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$T '1 dollar variable' ''${DOLLAR1:Q}
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$T '2 dollar variable' ''${DOLLAR2:Q}
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$T '4 dollar variable' ''${DOLLAR4:Q}
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$C 'Some hungry part of make eats all the dollars after a :U modifier.'
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$T '1 dollar var-default' ''${:U${DOLLAR1}:Q}
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$T '2 dollar var-default' ''${:U${DOLLAR2}:Q}
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$T '4 dollar var-default' ''${:U${DOLLAR4}:Q}
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$H 'Dollar in :S pattern'
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$T 'S,$$,word,' ''${DOLLAR_XY:S,$,word,:Q}
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$T 'S,$$X,word,' ''${DOLLAR_XY:S,$X,word,:Q}
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$T 'S,$$$$X,word,' ''${DOLLAR_XY:S,$$X,word,:Q}
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$T 'S,$$$$$$X,word,' ''${DOLLAR_XY:S,$$$X,word,:Q}
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$T 'S,$$X,replaced,' ''${X:S,$X,replaced,:Q}
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$T 'S,$$$$X,replaced,' ''${X:S,$$X,replaced,:Q}
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$T 'S,$$$$$$X,replaced,' ''${X:S,$$$X,replaced,:Q}
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$H 'Dollar in :C character class'
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$C 'The A is replaced because the $$$$ is reduced to a single $$,'
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$C 'which is then resolved to the variable X with the value VAR_X.'
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$C 'The effective character class becomes [VAR_XY].'
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$T 'C,[$$$$XY],<&>,g' ''${DOLLAR_AXY:C,[$$XY],<&>,g:Q}
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$H 'Dollar in :C pattern'
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$C 'For some reason, multiple dollars are folded into one.'
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$T 'C,$$,dollar,g' ''${DOLLAR:C,$,dollar,g:Q}
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$T 'C,$$$$,dollar,g' ''${DOLLAR:C,$$,dollar,g:Q}
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$H 'Dollar in :S replacement'
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$C 'For some reason, multiple dollars are folded into one.'
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$T 'S,word,a$$Xo,' ''${WORD:S,word,a$Xo,:Q}
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$T 'S,word,a$$$$Xo,' ''${WORD:S,word,a$$Xo,:Q}
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$T 'S,word,a$$$$$$Xo,' ''${WORD:S,word,a$$$Xo,:Q}
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