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2007-01-30 Paolo Bonzini <bonzini@gnu.org>

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* data/bison.m4 (b4_percent_define_flag_if): Don't treat 0 as false.
	Complain if the value does not match empty, "true" or "false".
	* data/c++.m4: Adjust default definitions of %define variables.
	* data/java.m4: Adjust default definitions of %define variables.
	* doc/bison.texinfo (Decl Summary): Adjust the %define entry according
	to above behavior.
	* tests/input.at (Boolean %define variables): Test new behavior.
This commit is contained in:
Paolo Bonzini
2007-01-30 08:01:29 +00:00
parent 8405b70c05
commit c1d19e10c3
6 changed files with 49 additions and 16 deletions
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8
data/bison.m4
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@@ -369,9 +369,11 @@ m4_define([b4_percent_define_ifdef],
m4_define([b4_percent_define_flag_if],
[b4_percent_define_ifdef([$1],
[m4_case(b4_percent_define_get([$1]),
[0], [$3], [false], [$3],
[$2])],
[m4_fatal([invalid %define variable passed to b4_percent_define_flag_if: ]$1)])])
[], [$2], [true], [$2], [false], [$3],
[m4_expand_once(
[b4_complain([[invalid value for %%define variable `%s']], [$1])],
[[b4_percent_define_flag_if($1)]])])],
[b4_fatal([[invalid %%define variable `%s' passed to b4_percent_define_flag_if]], [$1])])])
# b4_percent_define_default(VARIABLE, DEFAULT)
# --------------------------------------------