X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/d782395d52519fabb2cac3bd479246cc6de7efa8..6501566813190e211a55a44216044135b19259b0:/data/bison.m4 diff --git a/data/bison.m4 b/data/bison.m4 index 395245d0..bad62963 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, 2005, 2006, 2007, 2008 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 @@ -61,50 +62,76 @@ version 2.2 of Bison.])]) ## Error handling. ## ## ---------------- ## +# The following error handling macros print error directives that should not +# become arguments of other macro invocations since they would likely then be +# mangled. Thus, they print to stdout directly. + +# b4_cat(TEXT) +# ------------ +# Write TEXT to stdout. Precede the final newline with an @ so that it's +# escaped. For example: +# +# b4_cat([[@complain(invalid input@)]]) +m4_define([b4_cat], +[m4_syscmd([cat <<'_m4eof' +]m4_bpatsubst(m4_dquote($1), [_m4eof], [_m4@`eof])[@ +_m4eof +])dnl +m4_if(m4_sysval, [0], [], [m4_fatal([$0: cannot write to stdout])])]) + # b4_error(KIND, FORMAT, [ARG1], [ARG2], ...) # ------------------------------------------- -# Write @KIND(FORMAT@,ARG1@,ARG2@,...@) to diversion 0. +# Write @KIND(FORMAT@,ARG1@,ARG2@,...@) to stdout. +# +# For example: +# +# b4_error([[warn]], [[invalid value for `%s': %s]], [[foo]], [[3]]) m4_define([b4_error], -[m4_divert_push(0)[@]$1[(]$2[]m4_if([$#], [2], [], -[m4_foreach([b4_arg], - m4_dquote(m4_shift(m4_shift($@))), - [[@,]b4_arg])])[@)]m4_divert_pop(0)]) +[b4_cat([[@]$1[(]$2[]]dnl +[m4_if([$#], [2], [], + [m4_foreach([b4_arg], + m4_dquote(m4_shift(m4_shift($@))), + [[@,]b4_arg])])[@)]])]) # b4_error_at(KIND, START, END, FORMAT, [ARG1], [ARG2], ...) # ---------------------------------------------------------- -# Write @KIND(START@,END@,FORMAT@,ARG1@,ARG2@,...@) to diversion 0. +# Write @KIND_at(START@,END@,FORMAT@,ARG1@,ARG2@,...@) to stdout. +# +# For example: +# +# b4_error_at([[complain]], [[input.y:2.3]], [[input.y:5.4]], +# [[invalid %s]], [[foo]]) m4_define([b4_error_at], -[m4_divert_push(0)[@]$1[_at(]$2[@,]$3[@,]$4[]m4_if([$#], [4], [], -[m4_foreach([b4_arg], - m4_dquote(m4_shift(m4_shift(m4_shift(m4_shift($@))))), - [[@,]b4_arg])])[@)]m4_divert_pop(0)]) +[b4_cat([[@]$1[_at(]$2[@,]$3[@,]$4[]]dnl +[m4_if([$#], [4], [], + [m4_foreach([b4_arg], + m4_dquote(m4_shift(m4_shift(m4_shift(m4_shift($@))))), + [[@,]b4_arg])])[@)]])]) # b4_warn(FORMAT, [ARG1], [ARG2], ...) # ------------------------------------ -# Write @warn(FORMAT@,ARG1@,ARG2@,...@) to diversion 0. +# Write @warn(FORMAT@,ARG1@,ARG2@,...@) to stdout. +# +# For example: +# +# b4_warn([[invalid value for `%s': %s]], [[foo]], [[3]]) # # As a simple test suite, this: # +# m4_divert(-1) # m4_define([asdf], [ASDF]) # m4_define([fsa], [FSA]) # m4_define([fdsa], [FDSA]) # b4_warn([[[asdf), asdf]]], [[[fsa), fsa]]], [[[fdsa), fdsa]]]) -# m4_divert(0) # b4_warn([[asdf), asdf]], [[fsa), fsa]], [[fdsa), fdsa]]) -# m4_divert(0) -# b4_warn([asdf), asdf], [fsa), fsa], [fdsa), fdsa]) -# m4_divert(0) # b4_warn() -# m4_divert(0) # b4_warn(1) -# m4_divert(0) # b4_warn(1, 2) # -# Should produce this: +# Should produce this without newlines: # # @warn([asdf), asdf]@,[fsa), fsa]@,[fdsa), fdsa]@) # @warn(asdf), asdf@,fsa), fsa@,fdsa), fdsa@) -# @warn(ASDF), ASDF@,FSA), FSA@,FDSA), FDSA@) # @warn(@) # @warn(1@) # @warn(1@,2@) @@ -113,37 +140,47 @@ m4_define([b4_warn], # b4_warn_at(START, END, FORMAT, [ARG1], [ARG2], ...) # --------------------------------------------------- -# Write @warn(START@,END@,FORMAT@,ARG1@,ARG2@,...@) to diversion 0. +# Write @warn(START@,END@,FORMAT@,ARG1@,ARG2@,...@) to stdout. +# +# For example: +# +# b4_warn_at([[input.y:2.3]], [[input.y:5.4]], [[invalid %s]], [[foo]]) m4_define([b4_warn_at], [b4_error_at([[warn]], $@)]) # b4_complain(FORMAT, [ARG1], [ARG2], ...) # ---------------------------------------- -# Write @complain(FORMAT@,ARG1@,ARG2@,...@) to diversion 0. +# Write @complain(FORMAT@,ARG1@,ARG2@,...@) to stdout. # -# See the test suite for b4_warn above. +# See b4_warn example. m4_define([b4_complain], [b4_error([[complain]], $@)]) # b4_complain_at(START, END, FORMAT, [ARG1], [ARG2], ...) # ------------------------------------------------------- -# Write @complain(START@,END@,FORMAT@,ARG1@,ARG2@,...@) to diversion 0. +# Write @complain(START@,END@,FORMAT@,ARG1@,ARG2@,...@) to stdout. +# +# See b4_warn_at example. m4_define([b4_complain_at], [b4_error_at([[complain]], $@)]) # b4_fatal(FORMAT, [ARG1], [ARG2], ...) # ------------------------------------- -# Write @fatal(FORMAT@,ARG1@,ARG2@,...@) to diversion 0. +# Write @fatal(FORMAT@,ARG1@,ARG2@,...@) to stdout and exit. # -# See the test suite for b4_warn above. +# See b4_warn example. m4_define([b4_fatal], -[b4_error([[fatal]], $@)]) +[b4_error([[fatal]], $@)dnl +m4_exit(1)]) # b4_fatal_at(START, END, FORMAT, [ARG1], [ARG2], ...) # ---------------------------------------------------- -# Write @fatal(START@,END@,FORMAT@,ARG1@,ARG2@,...@) to diversion 0. +# Write @fatal(START@,END@,FORMAT@,ARG1@,ARG2@,...@) to stdout and exit. +# +# See b4_warn_at example. m4_define([b4_fatal_at], -[b4_error_at([[fatal]], $@)]) +[b4_error_at([[fatal]], $@)dnl +m4_exit(1)]) ## ---------------- ## @@ -214,7 +251,6 @@ 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. @@ -340,6 +376,42 @@ 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_get_loc(VARIABLE) +# ----------------------------------- +# 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 +# b4_fatal_at. Don't record this as a Bison usage of VARIABLE as there's no +# reason to suspect that the user-supplied value has yet influenced the output. +# +# For example: +# +# b4_complain_at(b4_percent_define_get_loc([[foo]]), [[invalid foo]]) +m4_define([b4_percent_define_get_loc], +[m4_ifdef([b4_percent_define_loc(]$1[)], + [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_percent_define_get_syncline(VARIABLE) +# ---------------------------------------- +# 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 +# VARIABLE as there's no reason to suspect that the user-supplied value has yet +# influenced the output. +# +# For example: +# +# b4_percent_define_get_syncline([[foo]]) +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_percent_define_ifdef(VARIABLE, IF-TRUE, [IF-FALSE]) # ------------------------------------------------------ # Mimic muscle_percent_define_ifdef in ../src/muscle_tab.h exactly. That is, @@ -372,13 +444,10 @@ m4_define([b4_percent_define_flag_if], [b4_percent_define_ifdef([$1], [m4_case(b4_percent_define_get([$1]), [], [$2], [true], [$2], [false], [$3], - [m4_expand_once([dnl - m4_pushdef([b4_loc], m4_indir([b4_percent_define_loc(]$1[)]))dnl - b4_complain_at(b4_loc, - [[invalid value for %%define Boolean variable `%s']], - [$1])dnl - m4_popdef([b4_loc])], - [[b4_percent_define_flag_if($1)]])])], + [m4_expand_once([b4_complain_at(b4_percent_define_get_loc([$1]), + [[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_percent_define_default(VARIABLE, DEFAULT) @@ -395,7 +464,10 @@ 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]:0.0]], [[[Bison:b4_percent_define_default]:0.0]]]])])]) + [[[[[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]"]])[ +]])])]) # b4_percent_define_check_values(VALUES) # -------------------------------------- @@ -425,12 +497,10 @@ m4_define([_b4_percent_define_check_values], [m4_if(m4_indir([b4_percent_define(]$1[)]), b4_value, [m4_define([b4_good_value], [1])])])])dnl m4_if(b4_good_value, [0], - [m4_pushdef([b4_loc], m4_indir([b4_percent_define_loc(]$1[)]))dnl - b4_complain_at(b4_loc, + [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_popdef([b4_loc])])dnl + m4_dquote(m4_indir([b4_percent_define(]$1[)])))])dnl m4_popdef([b4_good_value])], [b4_fatal([[undefined %%define variable `%s' passed to b4_percent_define_check_values]], [$1])])]) @@ -452,7 +522,7 @@ 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])]) @@ -480,7 +550,7 @@ 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]]) ])