X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/35b8730d018b0bb25f7864d0db20f687ebad11b6..68f91d58f15abe21c65a8b4d7022ccb854c857dc:/data/bison.m4?ds=sidebyside diff --git a/data/bison.m4 b/data/bison.m4 index fbf375bd..d8708284 100644 --- a/data/bison.m4 +++ b/data/bison.m4 @@ -1,7 +1,8 @@ -*- Autoconf -*- # Language-independent M4 Macros for Bison. -# Copyright (C) 2002, 2004, 2005, 2006, 2007 Free Software Foundation, Inc. + +# Copyright (C) 2002, 2004-2013 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 @@ -57,6 +58,30 @@ This special exception was added by the Free Software Foundation in version 2.2 of Bison.])]) +## -------- ## +## Output. ## +## -------- ## + +# b4_output_begin(FILE) +# --------------------- +# Enable output, i.e., send to diversion 0, expand after "#", and +# generate the tag to output into FILE. Must be followed by EOL. +m4_define([b4_output_begin], +[m4_changecom() +m4_divert_push(0)dnl +@output(m4_unquote([$1])@)@dnl +]) + + +# b4_output_end() +# --------------- +# Output nothing, restore # as comment character (no expansions after #). +m4_define([b4_output_end], +[m4_divert_pop(0) +m4_changecom([#]) +]) + + ## ---------------- ## ## Error handling. ## ## ---------------- ## @@ -74,7 +99,8 @@ version 2.2 of Bison.])]) m4_define([b4_cat], [m4_syscmd([cat <<'_m4eof' ]m4_bpatsubst(m4_dquote($1), [_m4eof], [_m4@`eof])[@ -_m4eof])dnl +_m4eof +])dnl m4_if(m4_sysval, [0], [], [m4_fatal([$0: cannot write to stdout])])]) # b4_error(KIND, FORMAT, [ARG1], [ARG2], ...) @@ -83,7 +109,7 @@ m4_if(m4_sysval, [0], [], [m4_fatal([$0: cannot write to stdout])])]) # # For example: # -# b4_error([[warn]], [[invalid value for `%s': %s]], [[foo]], [[3]]) +# b4_error([[warn]], [[invalid value for '%s': %s]], [[foo]], [[3]]) m4_define([b4_error], [b4_cat([[@]$1[(]$2[]]dnl [m4_if([$#], [2], [], @@ -112,7 +138,7 @@ m4_define([b4_error_at], # # For example: # -# b4_warn([[invalid value for `%s': %s]], [[foo]], [[3]]) +# b4_warn([[invalid value for '%s': %s]], [[foo]], [[3]]) # # As a simple test suite, this: # @@ -181,21 +207,6 @@ m4_define([b4_fatal_at], m4_exit(1)]) -## ---------------- ## -## Default values. ## -## ---------------- ## - -# m4_define_default([b4_lex_param], []) dnl breaks other skeletons -m4_define_default([b4_pre_prologue], []) -m4_define_default([b4_post_prologue], []) -m4_define_default([b4_epilogue], []) -m4_define_default([b4_parse_param], []) - -# The initial column and line. -m4_define_default([b4_location_initial_column], [1]) -m4_define_default([b4_location_initial_line], [1]) - - ## ------------ ## ## Data Types. ## ## ------------ ## @@ -231,9 +242,9 @@ m4_define([b4_define_flag_if], # _b4_define_flag_if($1, $2, FLAG) # -------------------------------- -# This macro works around the impossibility to define macros -# inside macros, because issuing `[$1]' is not possible in M4 :(. -# This sucks hard, GNU M4 should really provide M5 like $$1. +# Work around the impossibility to define macros inside macros, +# because issuing `[$1]' is not possible in M4. GNU M4 should provide +# $$1 a la M5/TeX. m4_define([_b4_define_flag_if], [m4_if([$1$2], $[1]$[2], [], [m4_fatal([$0: Invalid arguments: $@])])dnl @@ -244,18 +255,17 @@ m4_define([b4_$3_if], # b4_FLAG_if(IF-TRUE, IF-FALSE) # ----------------------------- # 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([pure]) # Whether the interface is pure. -b4_define_flag_if([yacc]) # Whether POSIX Yacc is emulated. +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([token_table]) # Whether yytoken_table is demanded. +b4_define_flag_if([yacc]) # Whether POSIX Yacc is emulated. +# yytoken_table is needed to support verbose errors. +b4_error_verbose_if([m4_define([b4_token_table_flag], [1])]) -## ------------------------- ## -## Assigning token numbers. ## -## ------------------------- ## ## ----------- ## @@ -273,8 +283,8 @@ m4_define([b4_basename], # b4_syncline(LINE, FILE) # ----------------------- m4_define([b4_syncline], -[b4_flag_if([synclines], [ -b4_sync_end([__line__], [b4_basename(m4_quote(__file__))]) +[b4_flag_if([synclines], +[b4_sync_end([__line__], [b4_basename(m4_quote(__file__))]) b4_sync_start([$1], [$2])])]) m4_define([b4_sync_end], [b4_comment([Line $1 of $2])]) @@ -311,13 +321,13 @@ b4_define_user_code([stype]) # b4_check_user_names(WHAT, USER-LIST, BISON-NAMESPACE) -# -------------------------------------------------------- -# Warn if any name of type WHAT is used by the user (as recorded in USER-LIST) -# but is not used by Bison (as recorded by macros in the namespace -# BISON-NAMESPACE). +# ----------------------------------------------------- +# Complain if any name of type WHAT is used by the user (as recorded in +# USER-LIST) 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. # @@ -352,19 +362,35 @@ m4_pushdef([b4_user_name], m4_car(b4_occurrence))dnl m4_pushdef([b4_start], m4_car(m4_shift(b4_occurrence)))dnl m4_pushdef([b4_end], m4_shift(m4_shift(b4_occurrence)))dnl m4_ifndef($3[(]m4_quote(b4_user_name)[)], - [b4_warn_at([b4_start], [b4_end], - [[%s `%s' is not used]], - [$1], [b4_user_name])])[]dnl + [b4_complain_at([b4_start], [b4_end], + [[%s '%s' is not used]], + [$1], [b4_user_name])])[]dnl m4_popdef([b4_occurrence])dnl m4_popdef([b4_user_name])dnl m4_popdef([b4_start])dnl m4_popdef([b4_end])dnl ])]) -# b4_percent_define_get(VARIABLE) + + + +## --------------------- ## +## b4_percent_define_*. ## +## --------------------- ## + + +# b4_percent_define_use(VARIABLE) # ------------------------------- -# Mimic muscle_percent_define_get in ../src/muscle_tab.h exactly. That is, if -# the %define variable VARIABLE is defined, emit its value. Also, record +# 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, [DEFAULT]) +# ------------------------------------------ +# Mimic muscle_percent_define_get in ../src/muscle-tab.h. That is, if +# the %define variable VARIABLE is defined, emit its value. Contrary +# to its C counterpart, return DEFAULT otherwise. Also, record # Bison's usage of VARIABLE by defining # b4_percent_define_bison_variables(VARIABLE). # @@ -372,12 +398,15 @@ m4_popdef([b4_end])dnl # # b4_percent_define_get([[foo]]) m4_define([b4_percent_define_get], -[m4_define([b4_percent_define_bison_variables(]$1[)])dnl -m4_ifdef([b4_percent_define(]$1[)], [m4_indir([b4_percent_define(]$1[)])])]) +[b4_percent_define_use([$1])dnl +m4_ifdef([b4_percent_define(]$1[)], + [m4_indir([b4_percent_define(]$1[)])], + [$2])]) + # b4_percent_define_get_loc(VARIABLE) # ----------------------------------- -# Mimic muscle_percent_define_get_loc in ../src/muscle_tab.h exactly. That is, +# Mimic muscle_percent_define_get_loc in ../src/muscle-tab.h exactly. That is, # if the %define variable VARIABLE is undefined, complain fatally since that's # a Bison or skeleton error. Otherwise, return its definition location in a # form approriate for the first two arguments of b4_warn_at, b4_complain_at, or @@ -392,11 +421,11 @@ m4_define([b4_percent_define_get_loc], [m4_pushdef([b4_loc], m4_indir([b4_percent_define_loc(]$1[)]))dnl b4_loc[]dnl m4_popdef([b4_loc])], - [b4_fatal([[undefined %%define variable `%s' passed to b4_percent_define_get_loc]], [$1])])]) + [b4_fatal([[b4_percent_define_get_loc: undefined %%define variable '%s']], [$1])])]) # b4_percent_define_get_syncline(VARIABLE) # ---------------------------------------- -# Mimic muscle_percent_define_get_syncline in ../src/muscle_tab.h exactly. +# Mimic muscle_percent_define_get_syncline in ../src/muscle-tab.h exactly. # That is, if the %define variable VARIABLE is undefined, complain fatally # since that's a Bison or skeleton error. Otherwise, return its definition # location as a b4_syncline invocation. Don't record this as a Bison usage of @@ -409,11 +438,11 @@ m4_popdef([b4_loc])], m4_define([b4_percent_define_get_syncline], [m4_ifdef([b4_percent_define_syncline(]$1[)], [m4_indir([b4_percent_define_syncline(]$1[)])], - [b4_fatal([[undefined %%define variable `%s' passed to b4_percent_define_get_syncline]], [$1])])]) + [b4_fatal([[b4_percent_define_get_syncline: undefined %%define variable '%s']], [$1])])]) # b4_percent_define_ifdef(VARIABLE, IF-TRUE, [IF-FALSE]) # ------------------------------------------------------ -# Mimic muscle_percent_define_ifdef in ../src/muscle_tab.h exactly. That is, +# Mimic muscle_percent_define_ifdef in ../src/muscle-tab.h exactly. That is, # if the %define variable VARIABLE is defined, expand IF-TRUE, else expand # IF-FALSE. Also, record Bison's usage of VARIABLE by defining # b4_percent_define_bison_variables(VARIABLE). @@ -428,7 +457,7 @@ m4_define([b4_percent_define_ifdef], # b4_percent_define_flag_if(VARIABLE, IF-TRUE, [IF-FALSE]) # -------------------------------------------------------- -# Mimic muscle_percent_define_flag_if in ../src/muscle_tab.h exactly. That is, +# Mimic muscle_percent_define_flag_if in ../src/muscle-tab.h exactly. That is, # if the %define variable VARIABLE is defined to "" or "true", expand IF-TRUE. # If it is defined to "false", expand IF-FALSE. Complain if it is undefined # (a Bison or skeleton error since the default value should have been set @@ -444,14 +473,14 @@ m4_define([b4_percent_define_flag_if], [m4_case(b4_percent_define_get([$1]), [], [$2], [true], [$2], [false], [$3], [m4_expand_once([b4_complain_at(b4_percent_define_get_loc([$1]), - [[invalid value for %%define Boolean variable `%s']], + [[invalid value for %%define Boolean variable '%s']], [$1])], [[b4_percent_define_flag_if($1)]])])], - [b4_fatal([[undefined %%define variable `%s' passed to b4_percent_define_flag_if]], [$1])])]) + [b4_fatal([[b4_percent_define_flag_if: undefined %%define variable '%s']], [$1])])]) # b4_percent_define_default(VARIABLE, DEFAULT) # -------------------------------------------- -# Mimic muscle_percent_define_default in ../src/muscle_tab.h exactly. That is, +# Mimic muscle_percent_define_default in ../src/muscle-tab.h exactly. That is, # if the %define variable VARIABLE is undefined, set its value to DEFAULT. # Don't record this as a Bison usage of VARIABLE as there's no reason to # suspect that the value has yet influenced the output. @@ -463,14 +492,13 @@ m4_define([b4_percent_define_default], [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]"]])[ -]])])]) + [[[[:-1.-1]], + [[:-1.-1]]]])dnl + m4_define([b4_percent_define_syncline(]$1[)], [[]])])]) # b4_percent_define_check_values(VALUES) # -------------------------------------- -# Mimic muscle_percent_define_check_values in ../src/muscle_tab.h exactly +# Mimic muscle_percent_define_check_values in ../src/muscle-tab.h exactly # except that the VALUES structure is more appropriate for M4. That is, VALUES # is a list of sublists of strings. For each sublist, the first string is the # name of a %define variable, and all remaining strings in that sublist are the @@ -497,11 +525,15 @@ m4_define([_b4_percent_define_check_values], [m4_define([b4_good_value], [1])])])])dnl m4_if(b4_good_value, [0], [b4_complain_at(b4_percent_define_get_loc([$1]), - [[invalid value for %%define variable `%s': `%s']], + [[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])])]) + [b4_fatal([[b4_percent_define_check_values: undefined %%define variable '%s']], [$1])])]) # b4_percent_code_get([QUALIFIER]) # -------------------------------- @@ -521,7 +553,7 @@ m4_define([b4_percent_code_get], m4_ifval([$1], [m4_define([b4_percent_code_bison_qualifiers(]$1[)])])dnl m4_ifdef(b4_macro_name, [b4_comment([m4_if([$#], [0], [[Unqualified %code]], - [[%code "]$1["]])[ blocks.]]) + [["%code ]$1["]])[ blocks.]]) b4_user_code([m4_indir(b4_macro_name)]) ])dnl m4_popdef([b4_macro_name])]) @@ -549,7 +581,30 @@ m4_define([b4_check_user_names_wrap], [b4_percent_]$1[_user_]$2[s], [[b4_percent_]$1[_bison_]$2[s]])])]) -m4_wrap([ +m4_wrap_lifo([ b4_check_user_names_wrap([[define]], [[variable]]) b4_check_user_names_wrap([[code]], [[qualifier]]) ]) + + +## ---------------- ## +## Default values. ## +## ---------------- ## + +# m4_define_default([b4_lex_param], []) dnl breaks other skeletons +m4_define_default([b4_pre_prologue], []) +m4_define_default([b4_post_prologue], []) +m4_define_default([b4_epilogue], []) +m4_define_default([b4_parse_param], []) + +# The initial column and line. +m4_define_default([b4_location_initial_column], [1]) +m4_define_default([b4_location_initial_line], [1]) + +# Sanity checks. +b4_percent_define_ifdef([api.prefix], +[m4_ifdef([b4_prefix], +[b4_complain_at(b4_percent_define_get_loc([api.prefix]), + [['%s' and '%s' cannot be used together]], + [%name-prefix], + [%define api.prefix])])])