1# $NetBSD: dollar.mk,v 1.4 2020/11/03 18:21:36 rillig Exp $ 2# 3# Test the various places where a dollar sign can appear and 4# see what happens. There are lots of surprises here. 5# 6 7LIST= plain 'single' "double" 'mix'"ed" back\ slashed 8WORD= word 9 10DOLLAR1= $ 11DOLLAR2= $$ 12DOLLAR4= $$$$ 13 14X= VAR_X 15DOLLAR_XY= $$XY 16DOLLAR_AXY= $$AXY 17 18H= @header() { printf '\n%s\n\n' "$$*"; }; header 19T= @testcase() { printf '%23s => <%s>\n' "$$@"; }; testcase 20C= @comment() { printf '%s\n' "$$*"; }; comment 21 22# These variable values are not accessed. 23# The trailing dollar in the '1 dollar literal eol' test case accesses 24# the empty variable instead, which is always guaranteed to be empty. 25${:U }= space-var-value 26${:U${.newline}}= newline-var-value 27# But this one is accessed. 28${:U'}= single-quote-var-value' 29 30all: 31 $H 'Printing dollar from literals and variables' 32 33 $C 'To survive the parser, a dollar sign must be doubled.' 34 $T '1 dollar literal' '$' 35 $T '1 dollar literal eol' ''$ 36 $T '2 dollar literal' '$$' 37 $T '4 dollar literal' '$$$$' 38 39 $C 'Some hungry part of make eats all the dollars after a :U modifier.' 40 $T '1 dollar default' ''${:U$:Q} 41 $T '2 dollar default' ''${:U$$:Q} 42 $T '4 dollar default' ''${:U$$$$:Q} 43 44 $C 'This works as expected.' 45 $T '1 dollar variable' ''${DOLLAR1:Q} 46 $T '2 dollar variable' ''${DOLLAR2:Q} 47 $T '4 dollar variable' ''${DOLLAR4:Q} 48 49 $C 'Some hungry part of make eats all the dollars after a :U modifier.' 50 $T '1 dollar var-default' ''${:U${DOLLAR1}:Q} 51 $T '2 dollar var-default' ''${:U${DOLLAR2}:Q} 52 $T '4 dollar var-default' ''${:U${DOLLAR4}:Q} 53 54 $H 'Dollar in :S pattern' 55 56 $T 'S,$$,word,' ''${DOLLAR_XY:S,$,word,:Q} 57 $T 'S,$$X,word,' ''${DOLLAR_XY:S,$X,word,:Q} 58 $T 'S,$$$$X,word,' ''${DOLLAR_XY:S,$$X,word,:Q} 59 $T 'S,$$$$$$X,word,' ''${DOLLAR_XY:S,$$$X,word,:Q} 60 61 $T 'S,$$X,replaced,' ''${X:S,$X,replaced,:Q} 62 $T 'S,$$$$X,replaced,' ''${X:S,$$X,replaced,:Q} 63 $T 'S,$$$$$$X,replaced,' ''${X:S,$$$X,replaced,:Q} 64 65 $H 'Dollar in :C character class' 66 67 $C 'The A is replaced because the $$$$ is reduced to a single $$,' 68 $C 'which is then resolved to the variable X with the value VAR_X.' 69 $C 'The effective character class becomes [VAR_XY].' 70 $T 'C,[$$$$XY],<&>,g' ''${DOLLAR_AXY:C,[$$XY],<&>,g:Q} 71 72 $H 'Dollar in :C pattern' 73 $C 'For some reason, multiple dollars are folded into one.' 74 $T 'C,$$,dollar,g' ''${DOLLAR:C,$,dollar,g:Q} 75 $T 'C,$$$$,dollar,g' ''${DOLLAR:C,$$,dollar,g:Q} 76 77 $H 'Dollar in :S replacement' 78 $C 'For some reason, multiple dollars are folded into one.' 79 $T 'S,word,a$$Xo,' ''${WORD:S,word,a$Xo,:Q} 80 $T 'S,word,a$$$$Xo,' ''${WORD:S,word,a$$Xo,:Q} 81 $T 'S,word,a$$$$$$Xo,' ''${WORD:S,word,a$$$Xo,:Q} 82