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# $NetBSD: varparse-mod.mk,v 1.2 2023/11/19 21:47:52 rillig Exp $
# Tests for parsing expressions with modifiers.
# As of 2020-10-02, the below condition does not result in a parse error.
# The condition contains two separate mistakes. The first mistake is that
# the :!cmd! modifier is missing the closing '!'. The second mistake is that
# there is a stray '}' at the end of the whole condition.
#
# As of 2020-10-02, the actual parse result of this condition is a single
# expression with 2 modifiers. The first modifier is
# ":!echo "\$VAR"} !". Afterwards, the parser optionally skips a ':' (at the
# bottom of ApplyModifiers) and continues with the next modifier, in this case
# "= "value"", which is interpreted as a SysV substitution modifier with an
# empty left-hand side, thereby appending the string " "value"" to each word
# of the expression.
#
# As of 2020-10-02, some modifiers ensure that they are followed by either a
# ':' or the closing brace or parenthesis of the expression. The modifiers
# that don't ensure this are (in order of appearance in ApplyModifier):
# :@var@replacement@
# :_
# :L
# :P
# :!cmd!
# :gmtime=...
# :localtime=...
# :M (because '}' and ')' are treated the same)
# :N (because '}' and ')' are treated the same)
# :S
# :C
# :range=...
# On the other hand, these modifiers ensure that they are followed by a
# delimiter:
# :D
# :U
# :[...]
# :gmtime (if not followed by '=')
# :hash (if not followed by '=')
# :localtime (if not followed by '=')
# :t
# :q
# :Q
# :T
# :H
# :E
# :R
# :range (if not followed by '=')
# :O
# :u
# :sh
# These modifiers don't care since they reach until the closing character
# of the expression, which is either ')' or '}':
# ::= (as well as the other assignment modifiers)
# :?
#
.if ${:!echo "\$VAR"} != "value"}
.endif
all:
@:
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