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cond-token-string.mk revision 1.16 
      1 # $NetBSD: cond-token-string.mk,v 1.16 2025/03/29 19:08:52 rillig Exp $
      2 #
      3 # Tests for quoted string literals in .if conditions.
      4 #
      5 # See also:
      6 #	cond-token-plain.mk
      7 #		Covers string literals without quotes (called "bare words").
      8 
      9 # TODO: Implementation
     10 
     11 # Cover the code in CondParser_String that frees the memory after parsing
     12 # an expression based on an undefined variable.
     13 # expect+1: Unknown modifier ":Z"
     14 .if "" != "${:Uvalue:Z}"
     15 .  error
     16 .else
     17 .  error
     18 .endif
     19 
     20 .if x${:Uvalue}
     21 .  error
     22 .else
     23 # expect+1: xvalue is not defined.
     24 .  info xvalue is not defined.
     25 .endif
     26 
     27 # The 'x' produces a "Malformed conditional" since the left-hand side of a
     28 # comparison in an .if directive must be either an expression, a
     29 # quoted string literal or a number that starts with a digit.
     30 # expect+1: Malformed conditional 'x${:Uvalue} == ""'
     31 .if x${:Uvalue} == ""
     32 .  error
     33 .else
     34 .  error
     35 .endif
     36 
     37 # In plain words, a '\' can be used to escape any character, just as in
     38 # double-quoted string literals.  See CondParser_String.
     39 .if \x${:Uvalue} == "xvalue"
     40 # expect+1: Expected.
     41 .  info Expected.
     42 .else
     43 .  error
     44 .endif
     45 
     46 .MAKEFLAGS: -dc
     47 
     48 # A string in quotes is checked whether it is not empty.
     49 .if "UNDEF"
     50 # expect+1: The string literal "UNDEF" is not empty.
     51 .  info The string literal "UNDEF" is not empty.
     52 .else
     53 .  error
     54 .endif
     55 
     56 # A space is not empty as well.
     57 # This differs from many other places where whitespace is trimmed.
     58 .if " "
     59 # expect+1: The string literal " " is not empty, even though it consists of whitespace only.
     60 .  info The string literal " " is not empty, even though it consists of $\
     61 	whitespace only.
     62 .else
     63 .  error
     64 .endif
     65 
     66 .if "${UNDEF}"
     67 .  error
     68 .else
     69 # expect+1: An undefined variable in quotes expands to an empty string, which then evaluates to false.
     70 .  info An undefined variable in quotes expands to an empty string, which $\
     71 	then evaluates to false.
     72 .endif
     73 
     74 .if "${:Uvalue}"
     75 # expect+1: A nonempty expression evaluates to true.
     76 .  info A nonempty expression evaluates to true.
     77 .else
     78 .  error
     79 .endif
     80 
     81 .if "${:U}"
     82 .  error
     83 .else
     84 # expect+1: An empty variable evaluates to false.
     85 .  info An empty variable evaluates to false.
     86 .endif
     87 
     88 # A non-empty string evaluates to true, no matter if it's a literal string or
     89 # if it contains expressions.  The parentheses are not necessary for
     90 # the parser, in this case their only purpose is to make the code harder to
     91 # read for humans.
     92 VAR=	value
     93 .if ("${VAR}")
     94 .else
     95 .  error
     96 .endif
     97 
     98 # In the conditions in .if directives, the left-hand side of a comparison must
     99 # be enclosed in quotes.  The right-hand side does not need to be enclosed in
    100 # quotes.
    101 .if "quoted" == quoted
    102 .else
    103 .  error
    104 .endif
    105 
    106 .MAKEFLAGS: -d0
    107 
    108 all: .PHONY
    109