-*- Autoconf -*-
# Language-independent M4 Macros for Bison.
-# Copyright (C) 2002, 2004, 2005, 2006, 2007, 2008 Free Software Foundation,
-# Inc.
+# Copyright (C) 2002, 2004, 2005, 2006, 2007, 2008, 2009
+# Free Software Foundation, Inc.
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
STATE-NUM.]])
$1([defact], [b4_defact],
- [[YYDEFACT[S] -- default rule to reduce with in state S when YYTABLE
-does not specify something else to do. Zero means the default is an
-error.]])
+ [[YYDEFACT[S] -- default reduction number in state S. Performed when
+YYTABLE does not specify something else to do. Zero means the default
+is an error.]])
$1([pgoto], [b4_pgoto], [[YYPGOTO[NTERM-NUM].]])
$1([table], [b4_table],
[[YYTABLE[YYPACT[STATE-NUM]]. What to do in state STATE-NUM. If
positive, shift that token. If negative, reduce the rule which
-number is the opposite. If zero, do what YYDEFACT says.
-If YYTABLE_NINF, syntax error.]])
+number is the opposite. If YYTABLE_NINF, syntax error.]])
$1([check], [b4_check])
# -----------------------------
# Expand IF-TRUE, if FLAG is true, IF-FALSE otherwise.
b4_define_flag_if([defines]) # Whether headers are requested.
-b4_define_flag_if([error_verbose]) # Whether error are verbose.
b4_define_flag_if([glr]) # Whether a GLR parser is requested.
-b4_define_flag_if([locations]) # Whether locations are tracked.
b4_define_flag_if([nondeterministic]) # Whether conflicts should be handled.
b4_define_flag_if([yacc]) # Whether POSIX Yacc is emulated.
# undefined. If FIELD = id, prepend the prefix.
m4_define([b4_symbol],
[m4_case([$2],
- [id], [m4_do([b4_percent_define_get([token.prefix])],
+ [id], [m4_do([b4_percent_define_get([api.tokens.prefix])],
[b4_symbol_([$1], [id])])],
[b4_symbol_($@)])])
# but is not used by Bison (as recorded by macros in the namespace
# BISON-NAMESPACE).
#
-# USER-LIST must expand to a list specifying all grammar occurrences of all
-# names of type WHAT. Each item in the list must be a triplet specifying one
+# USER-LIST must expand to a list specifying all user occurrences of all names
+# of type WHAT. Each item in the list must be a triplet specifying one
# occurrence: name, start boundary, and end boundary. Empty string names are
# fine. An empty list is fine.
#
m4_popdef([b4_end])dnl
])])
+
+
+## --------------------- ##
+## b4_percent_define_*. ##
+## --------------------- ##
+
+
+# b4_percent_define_use(VARIABLE)
+# -------------------------------
+# Declare that VARIABLE was used.
+m4_define([b4_percent_define_use],
+[m4_define([b4_percent_define_bison_variables(]$1[)])dnl
+])
+
# b4_percent_define_get(VARIABLE)
# -------------------------------
# Mimic muscle_percent_define_get in ../src/muscle_tab.h exactly. That is, if
#
# b4_percent_define_get([[foo]])
m4_define([b4_percent_define_get],
-[m4_define([b4_percent_define_bison_variables(]$1[)])dnl
+[b4_percent_define_use([$1])dnl
m4_ifdef([b4_percent_define(]$1[)], [m4_indir([b4_percent_define(]$1[)])])])
# b4_percent_define_get_loc(VARIABLE)
# b4_percent_define_ifdef([[foo]], [[it's defined]], [[it's undefined]])
m4_define([b4_percent_define_ifdef],
[m4_ifdef([b4_percent_define(]$1[)],
- [m4_define([b4_percent_define_bison_variables(]$1[)])$2],
+ [b4_percent_define_use([$1])$2],
[$3])])
+
+## --------- ##
+## Options. ##
+## --------- ##
+
+
# b4_percent_define_flag_if(VARIABLE, IF-TRUE, [IF-FALSE])
# --------------------------------------------------------
# Mimic muscle_percent_define_flag_if in ../src/muscle_tab.h exactly. That is,
[[b4_percent_define_flag_if($1)]])])],
[b4_fatal([[undefined %%define variable `%s' passed to b4_percent_define_flag_if]], [$1])])])
+
# b4_percent_define_default(VARIABLE, DEFAULT)
# --------------------------------------------
# Mimic muscle_percent_define_default in ../src/muscle_tab.h exactly. That is,
[m4_ifndef([b4_percent_define(]$1[)],
[m4_define([b4_percent_define(]$1[)], [$2])dnl
m4_define([b4_percent_define_loc(]$1[)],
- [[[[[Bison:b4_percent_define_default]:1.0]], [[[Bison:b4_percent_define_default]:1.0]]]])dnl
- m4_define([b4_percent_define_syncline(]$1[)],
- [[]b4_syncline(1, [["[Bison:b4_percent_define_default]"]])[
-]])])])
+ [[[[<skeleton default value>:-1.-1]],
+ [[<skeleton default value>:-1.-1]]]])dnl
+ m4_define([b4_percent_define_syncline(]$1[)], [[]])])])
+
+
+# b4_percent_define_if_define(VARIABLE)
+# -------------------------------------
+# Define b4_VARIABLE_if that executes its $1 or $2 depending whether
+# VARIABLE was %defined. The characters `.' and `-' in VARIABLE are mapped
+# to `_'.
+m4_define([b4_percent_define_if_define_],
+[m4_define(m4_bpatsubst([b4_$1_if], [[-.]], [_]),
+ [b4_percent_define_flag_if([$1], [$2], [$3])])])
+m4_define([b4_percent_define_if_define],
+[b4_percent_define_default([[$1]], [[false]])
+b4_percent_define_if_define_([$1], $[1], $[2])])
+
# b4_percent_define_check_values(VALUES)
# --------------------------------------
[b4_complain_at(b4_percent_define_get_loc([$1]),
[[invalid value for %%define variable `%s': `%s']],
[$1],
- m4_dquote(m4_indir([b4_percent_define(]$1[)])))])dnl
+ m4_dquote(m4_indir([b4_percent_define(]$1[)])))
+ m4_foreach([b4_value], m4_dquote(m4_shift($@)),
+ [b4_complain_at(b4_percent_define_get_loc([$1]),
+ [[accepted value: `%s']],
+ m4_dquote(b4_value))])])dnl
m4_popdef([b4_good_value])],
[b4_fatal([[undefined %%define variable `%s' passed to b4_percent_define_check_values]], [$1])])])
[$3])])
+## ------------------ ##
+## Common variables. ##
+## ------------------ ##
+
# Default values for %define.
# ---------------------------
-# If the %token.prefix, it is empty.
-m4_percent_define_default([[token.prefix]], [[]])
-
+# If the api.tokens.prefix, it is empty.
+m4_percent_define_default([[api.tokens.prefix]], [[]])
+
+# b4_parse_assert_if([IF-ASSERTIONS-ARE-USED], [IF-NOT])
+# b4_parse_trace_if([IF-DEBUG-TRACES-ARE-ENABLED], [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([lex_symbol])
+b4_percent_define_if_define([locations]) # Whether locations are tracked.
+b4_percent_define_if_define([parse.assert])
+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_define([b4_error_verbose_flag],
+ m4_case(b4_percent_define_get([[parse.error]]),
+ [simple], [[0]],
+ [verbose], [[1]]))
+b4_define_flag_if([error_verbose])
## ----------------------------------------------------------- ##
projects / bison.git / blobdiff