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variables: parse.error

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Implement, document, and test the replacement of %error-verbose
by %define parse.error "verbose".

	* data/bison.m4 (b4_error_verbose_if): Reimplement to track the
	values of the parse.error variable.
	Make "simple" its default value.
	Check the valid values.
	* src/parse-gram.y: Use %define parse.error.
	(PERCENT_ERROR_VERBOSE): New token.
	Support it.
	* src/scan-gram.l: Support %error-verbose.

	* doc/bison.texinfo (Decl Summary): Replace the documentation of
	%define error-verbose by that of %define parse.error.
	* NEWS: Document it.

	* tests/actions.at, tests/calc.at: Use parse.error instead of
	%error-verbose.
This commit is contained in:
Akim Demaille
2009-06-18 10:00:36 +02:00
parent d70059ec73
commit 31b850d2d4
8 changed files with 119 additions and 62 deletions
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14
data/bison.m4
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@@ -718,11 +718,9 @@ b4_percent_define_if_define_([$1], $[1], $[2])])
# b4_parse_assert_if([IF-ASSERTIONS-ARE-USED], [IF-NOT])
# b4_parse_trace_if([IF-DEBUG-TRACES-ARE-ENABLED], [IF-NOT])
# b4_error_verbose_if([IF-ERRORS-ARE-VERBOSE], [IF-NOT])
# b4_lex_symbol_if([IF-YYLEX-RETURNS-A-COMPLETE-SYMBOL], [IF-NOT])
# b4_variant_if([IF-VARIANT-ARE-USED], [IF-NOT])
# ----------------------------------------------
b4_percent_define_if_define([error-verbose])
b4_percent_define_if_define([lex_symbol])
b4_percent_define_if_define([locations]) # Whether locations are tracked.
b4_percent_define_if_define([parse.assert])
@@ -730,6 +728,18 @@ b4_percent_define_if_define([parse.trace])
b4_percent_define_if_define([variant])
# b4_error_verbose_if([IF-ERRORS-ARE-VERBOSE], [IF-NOT])
# ------------------------------------------------------
# Map %define parse.error "(simple|verbose)" to b4_error_verbose_if and
# b4_error_verbose_flag.
b4_percent_define_default([[parse.error]], [[simple]])
b4_percent_define_check_values([[[[parse.error]],
[[simple]], [[verbose]]]])
m4_case(b4_percent_define_get([[parse.error]]),
[simple], [m4_define([b4_error_verbose_flag], [[0]])],
[verbose], [m4_define([b4_error_verbose_flag], [[1]])])
b4_define_flag_if([error_verbose])
# b4_percent_define_check_values(VALUES)
# --------------------------------------