954401e68e
Merge commit '308a28d6cd2e87028e535eabccb89a9dc2fd9515'
100 lines
2.2 KiB
Makefile
100 lines
2.2 KiB
Makefile
# $NetBSD: cond-token-string.mk,v 1.6 2022/05/08 06:57:00 rillig Exp $
|
|
#
|
|
# Tests for quoted string literals in .if conditions.
|
|
#
|
|
# See also:
|
|
# cond-token-plain.mk
|
|
# Covers string literals without quotes (called "bare words").
|
|
|
|
# TODO: Implementation
|
|
|
|
# Cover the code in CondParser_String that frees the memory after parsing
|
|
# a variable expression based on an undefined variable.
|
|
.if "" != "${:Uvalue:Z}"
|
|
. error
|
|
.else
|
|
. error
|
|
.endif
|
|
|
|
.if x${:Uvalue}
|
|
. error
|
|
.else
|
|
. info xvalue is not defined.
|
|
.endif
|
|
|
|
# The 'x' produces a "Malformed conditional" since the left-hand side of a
|
|
# comparison in an .if directive must be either a variable expression, a
|
|
# quoted string literal or a number that starts with a digit.
|
|
.if x${:Uvalue} == ""
|
|
. error
|
|
.else
|
|
. error
|
|
.endif
|
|
|
|
# In plain words, a '\' can be used to escape any character, just as in
|
|
# double-quoted string literals. See CondParser_String.
|
|
.if \x${:Uvalue} == "xvalue"
|
|
. info Expected.
|
|
.else
|
|
. error
|
|
.endif
|
|
|
|
.MAKEFLAGS: -dc
|
|
|
|
# A string in quotes is checked whether it is not empty.
|
|
.if "UNDEF"
|
|
. info The string literal "UNDEF" is not empty.
|
|
.else
|
|
. error
|
|
.endif
|
|
|
|
# A space is not empty as well.
|
|
# This differs from many other places where whitespace is trimmed.
|
|
.if " "
|
|
. info The string literal " " is not empty, even though it consists of $\
|
|
whitespace only.
|
|
.else
|
|
. error
|
|
.endif
|
|
|
|
.if "${UNDEF}"
|
|
. error
|
|
.else
|
|
. info An undefined variable in quotes expands to an empty string, which $\
|
|
then evaluates to false.
|
|
.endif
|
|
|
|
.if "${:Uvalue}"
|
|
. info A nonempty variable expression evaluates to true.
|
|
.else
|
|
. error
|
|
.endif
|
|
|
|
.if "${:U}"
|
|
. error
|
|
.else
|
|
. info An empty variable evaluates to false.
|
|
.endif
|
|
|
|
# A non-empty string evaluates to true, no matter if it's a literal string or
|
|
# if it contains variable expressions. The parentheses are not necessary for
|
|
# the parser, in this case their only purpose is to make the code harder to
|
|
# read for humans.
|
|
VAR= value
|
|
.if ("${VAR}")
|
|
.else
|
|
. error
|
|
.endif
|
|
|
|
# In the conditions in .if directives, the left-hand side of a comparison must
|
|
# be enclosed in quotes. The right-hand side does not need to be enclosed in
|
|
# quotes.
|
|
.if "quoted" == quoted
|
|
.else
|
|
. error
|
|
.endif
|
|
|
|
.MAKEFLAGS: -d0
|
|
|
|
all: .PHONY
|