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1119 lines
38 KiB
1119 lines
38 KiB
-*- Autoconf -*-
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# Language-independent M4 Macros for Bison.
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# Copyright (C) 2002, 2004-2015, 2018-2019 Free Software Foundation,
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# Inc.
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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## ---------------- ##
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## Identification. ##
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## ---------------- ##
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# b4_generated_by
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# ---------------
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m4_define([b4_generated_by],
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[b4_comment([A Bison parser, made by GNU Bison b4_version.])
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])
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# b4_copyright(TITLE, [YEARS])
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# ----------------------------
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# If YEARS are not defined, use b4_copyright_years.
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m4_define([b4_copyright],
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[b4_generated_by
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b4_comment([$1
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]m4_dquote(m4_text_wrap([Copyright (C)
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]m4_ifval([$2], [[$2]], [m4_defn([b4_copyright_years])])[
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Free Software Foundation, Inc.]))[
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.])
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b4_comment([As a special exception, you may create a larger work that contains
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part or all of the Bison parser skeleton and distribute that work
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under terms of your choice, so long as that work isn't itself a
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parser generator using the skeleton or a modified version thereof
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as a parser skeleton. Alternatively, if you modify or redistribute
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the parser skeleton itself, you may (at your option) remove this
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special exception, which will cause the skeleton and the resulting
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Bison output files to be licensed under the GNU General Public
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License without this special exception.
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This special exception was added by the Free Software Foundation in
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version 2.2 of Bison.])
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])
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# b4_disclaimer
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# -------------
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# Issue a warning about private implementation details.
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m4_define([b4_disclaimer],
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[b4_comment([Undocumented macros, especially those whose name start with YY_,
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are private implementation details. Do not rely on them.])
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])
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# b4_required_version_if(VERSION, IF_NEWER, IF_OLDER)
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# ---------------------------------------------------
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# If the version %require'd by the user is VERSION (or newer) expand
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# IF_NEWER, otherwise IF_OLDER. VERSION should be an integer, e.g.,
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# 302 for 3.2.
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m4_define([b4_required_version_if],
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[m4_if(m4_eval($1 <= b4_required_version),
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[1], [$2], [$3])])
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## -------- ##
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## Output. ##
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## -------- ##
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# b4_output_begin(FILE1, FILE2)
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# -----------------------------
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# Enable output, i.e., send to diversion 0, expand after "#", and
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# generate the tag to output into FILE. Must be followed by EOL.
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# FILE is FILE1 concatenated to FILE2. FILE2 can be empty, or be
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# absolute: do the right thing.
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m4_define([b4_output_begin],
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[m4_changecom()
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m4_divert_push(0)dnl
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@output(m4_unquote([$1])@,m4_unquote([$2])@)@dnl
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])
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# b4_output_end
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# -------------
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# Output nothing, restore # as comment character (no expansions after #).
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m4_define([b4_output_end],
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[m4_divert_pop(0)
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m4_changecom([#])
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])
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# b4_divert_kill(CODE)
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# --------------------
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# Expand CODE for its side effects, discard its output.
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m4_define([b4_divert_kill],
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[m4_divert_text([KILL], [$1])])
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# b4_define_silent(MACRO, CODE)
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# -----------------------------
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# Same as m4_define, but throw away the expansion of CODE.
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m4_define([b4_define_silent],
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[m4_define([$1], [b4_divert_kill([$2])])])
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## ---------------- ##
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## Error handling. ##
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## ---------------- ##
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# The following error handling macros print error directives that should not
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# become arguments of other macro invocations since they would likely then be
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# mangled. Thus, they print to stdout directly.
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# b4_cat(TEXT)
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# ------------
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# Write TEXT to stdout. Precede the final newline with an @ so that it's
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# escaped. For example:
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#
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# b4_cat([[@complain(invalid input@)]])
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m4_define([b4_cat],
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[m4_syscmd([cat <<'_m4eof'
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]m4_bpatsubst(m4_dquote($1), [_m4eof], [_m4@`eof])[@
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_m4eof
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])dnl
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m4_if(m4_sysval, [0], [], [m4_fatal([$0: cannot write to stdout])])])
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# b4_error(KIND, START, END, FORMAT, [ARG1], [ARG2], ...)
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# -------------------------------------------------------
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# Write @KIND(START@,END@,FORMAT@,ARG1@,ARG2@,...@) to stdout.
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#
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# For example:
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#
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# b4_error([[complain]], [[input.y:2.3]], [[input.y:5.4]],
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# [[invalid %s]], [[foo]])
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m4_define([b4_error],
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[b4_cat([[@complain][(]$1[@,]$2[@,]$3[@,]$4[]]dnl
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[m4_if([$#], [4], [],
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[m4_foreach([b4_arg],
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m4_dquote(m4_shift(m4_shift(m4_shift(m4_shift($@))))),
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[[@,]b4_arg])])[@)]])])
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# b4_warn(FORMAT, [ARG1], [ARG2], ...)
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# ------------------------------------
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# Write @warn(FORMAT@,ARG1@,ARG2@,...@) to stdout.
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#
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# For example:
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#
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# b4_warn([[invalid value for '%s': %s]], [[foo]], [[3]])
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#
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# As a simple test suite, this:
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#
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# m4_divert(-1)
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# m4_define([asdf], [ASDF])
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# m4_define([fsa], [FSA])
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# m4_define([fdsa], [FDSA])
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# b4_warn_at([[[asdf), asdf]]], [[[fsa), fsa]]], [[[fdsa), fdsa]]])
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# b4_warn_at([[asdf), asdf]], [[fsa), fsa]], [[fdsa), fdsa]])
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# b4_warn_at()
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# b4_warn_at(1)
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# b4_warn_at(1, 2)
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#
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# Should produce this without newlines:
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#
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# @warn_at([asdf), asdf]@,@,@,[fsa), fsa]@,[fdsa), fdsa]@)
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# @warn(asdf), asdf@,@,@,fsa), fsa@,fdsa), fdsa@)
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# @warn(@)
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# @warn(1@)
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# @warn(1@,2@)
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m4_define([b4_warn],
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[b4_warn_at([], [], $@)])
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# b4_warn_at(START, END, FORMAT, [ARG1], [ARG2], ...)
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# ---------------------------------------------------
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# Write @warn(START@,END@,FORMAT@,ARG1@,ARG2@,...@) to stdout.
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#
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# For example:
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#
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# b4_warn_at([[input.y:2.3]], [[input.y:5.4]], [[invalid %s]], [[foo]])
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m4_define([b4_warn_at],
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[b4_error([[warn]], $@)])
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# b4_complain(FORMAT, [ARG1], [ARG2], ...)
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# ----------------------------------------
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# Bounce to b4_complain_at.
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#
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# See b4_warn example.
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m4_define([b4_complain],
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[b4_complain_at([], [], $@)])
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# b4_complain_at(START, END, FORMAT, [ARG1], [ARG2], ...)
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# -------------------------------------------------------
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# Write @complain(START@,END@,FORMAT@,ARG1@,ARG2@,...@) to stdout.
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#
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# See b4_warn_at example.
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m4_define([b4_complain_at],
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[b4_error([[complain]], $@)])
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# b4_fatal(FORMAT, [ARG1], [ARG2], ...)
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# -------------------------------------
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# Bounce to b4_fatal_at.
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#
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# See b4_warn example.
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m4_define([b4_fatal],
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[b4_fatal_at([], [], $@)])
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# b4_fatal_at(START, END, FORMAT, [ARG1], [ARG2], ...)
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# ----------------------------------------------------
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# Write @fatal(START@,END@,FORMAT@,ARG1@,ARG2@,...@) to stdout and exit.
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#
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# See b4_warn_at example.
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m4_define([b4_fatal_at],
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[b4_error([[fatal]], $@)dnl
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m4_exit(1)])
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## ------------ ##
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## Data Types. ##
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## ------------ ##
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# b4_ints_in(INT1, INT2, LOW, HIGH)
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# ---------------------------------
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# Return 1 iff both INT1 and INT2 are in [LOW, HIGH], 0 otherwise.
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m4_define([b4_ints_in],
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[m4_eval([$3 <= $1 && $1 <= $4 && $3 <= $2 && $2 <= $4])])
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# b4_subtract(LHS, RHS)
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# ---------------------
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# Evaluate LHS - RHS if they are integer literals, otherwise expand
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# to (LHS) - (RHS).
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m4_define([b4_subtract],
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[m4_bmatch([$1$2], [^[0123456789]*$],
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[m4_eval([$1 - $2])],
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[($1) - ($2)])])
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# b4_join(ARG1, ...)
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# _b4_join(ARG1, ...)
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# -------------------
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# Join with comma, skipping empty arguments.
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# b4_join calls itself recursively until it sees the first non-empty
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# argument, then calls _b4_join (i.e., `_$0`) which prepends each
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# non-empty argument with a comma.
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m4_define([b4_join],
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[m4_if([$#$1],
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[1], [],
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[m4_ifval([$1],
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[$1[]_$0(m4_shift($@))],
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[$0(m4_shift($@))])])])
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# _b4_join(ARGS1, ...)
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# --------------------
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m4_define([_b4_join],
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[m4_if([$#$1],
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[1], [],
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[m4_ifval([$1], [, $1])[]$0(m4_shift($@))])])
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# b4_integral_parser_tables_map(MACRO)
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# -------------------------------------
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# Map MACRO on all the integral tables. MACRO is expected to have
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# the signature MACRO(TABLE-NAME, CONTENT, COMMENT).
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m4_define([b4_integral_parser_tables_map],
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[$1([pact], [b4_pact],
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[[YYPACT[STATE-NUM] -- Index in YYTABLE of the portion describing
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STATE-NUM.]])
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$1([defact], [b4_defact],
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[[YYDEFACT[STATE-NUM] -- Default reduction number in state STATE-NUM.
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Performed when YYTABLE does not specify something else to do. Zero
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means the default is an error.]])
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$1([pgoto], [b4_pgoto], [[YYPGOTO[NTERM-NUM].]])
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$1([defgoto], [b4_defgoto], [[YYDEFGOTO[NTERM-NUM].]])
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$1([table], [b4_table],
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[[YYTABLE[YYPACT[STATE-NUM]] -- What to do in state STATE-NUM. If
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positive, shift that token. If negative, reduce the rule whose
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number is the opposite. If YYTABLE_NINF, syntax error.]])
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$1([check], [b4_check])
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$1([stos], [b4_stos],
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[[YYSTOS[STATE-NUM] -- The (internal number of the) accessing
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symbol of state STATE-NUM.]])
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$1([r1], [b4_r1],
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[[YYR1[YYN] -- Symbol number of symbol that rule YYN derives.]])
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$1([r2], [b4_r2],
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[[YYR2[YYN] -- Number of symbols on the right hand side of rule YYN.]])
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])
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# b4_parser_tables_declare
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# b4_parser_tables_define
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# ------------------------
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# Define/declare the (deterministic) parser tables.
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m4_define([b4_parser_tables_declare],
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[b4_integral_parser_tables_map([b4_integral_parser_table_declare])])
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m4_define([b4_parser_tables_define],
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[b4_integral_parser_tables_map([b4_integral_parser_table_define])])
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## ------------------ ##
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## Decoding options. ##
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## ------------------ ##
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# b4_flag_if(FLAG, IF-TRUE, IF-FALSE)
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# -----------------------------------
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# Run IF-TRUE if b4_FLAG_flag is 1, IF-FALSE if FLAG is 0, otherwise fail.
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m4_define([b4_flag_if],
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[m4_case(b4_$1_flag,
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[0], [$3],
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[1], [$2],
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[m4_fatal([invalid $1 value: ]b4_$1_flag)])])
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# b4_define_flag_if(FLAG)
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# -----------------------
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# Define "b4_FLAG_if(IF-TRUE, IF-FALSE)" that depends on the
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# value of the Boolean FLAG.
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m4_define([b4_define_flag_if],
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[_b4_define_flag_if($[1], $[2], [$1])])
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# _b4_define_flag_if($1, $2, FLAG)
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# --------------------------------
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# Work around the impossibility to define macros inside macros,
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# because issuing '[$1]' is not possible in M4. GNU M4 should provide
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# $$1 a la M5/TeX.
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m4_define([_b4_define_flag_if],
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[m4_if([$1$2], $[1]$[2], [],
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[m4_fatal([$0: Invalid arguments: $@])])dnl
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m4_define([b4_$3_if],
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[b4_flag_if([$3], [$1], [$2])])])
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# b4_FLAG_if(IF-TRUE, IF-FALSE)
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# -----------------------------
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# Expand IF-TRUE, if FLAG is true, IF-FALSE otherwise.
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b4_define_flag_if([defines]) # Whether headers are requested.
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b4_define_flag_if([glr]) # Whether a GLR parser is requested.
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b4_define_flag_if([nondeterministic]) # Whether conflicts should be handled.
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b4_define_flag_if([token_table]) # Whether yytoken_table is demanded.
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b4_define_flag_if([yacc]) # Whether POSIX Yacc is emulated.
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# b4_glr_cc_if([IF-TRUE], [IF-FALSE])
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# -----------------------------------
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m4_define([b4_glr_cc_if],
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[m4_if(b4_skeleton, ["glr.cc"], $@)])
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## --------- ##
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## Symbols. ##
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## --------- ##
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# For a description of the Symbol handling, see README.
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#
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# The following macros provide access to symbol related values.
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# __b4_symbol(NUM, FIELD)
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# -----------------------
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# Recover a FIELD about symbol #NUM. Thanks to m4_indir, fails if
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# undefined.
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m4_define([__b4_symbol],
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[m4_indir([b4_symbol($1, $2)])])
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# _b4_symbol(NUM, FIELD)
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# ----------------------
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# Recover a FIELD about symbol #NUM (or "orig NUM"). Fails if
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# undefined.
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m4_define([_b4_symbol],
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[m4_ifdef([b4_symbol($1, number)],
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[__b4_symbol(m4_indir([b4_symbol($1, number)]), $2)],
|
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[__b4_symbol([$1], [$2])])])
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# b4_symbol(NUM, FIELD)
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# ---------------------
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# Recover a FIELD about symbol #NUM (or "orig NUM"). Fails if
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# undefined. If FIELD = id, prepend the token prefix.
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m4_define([b4_symbol],
|
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[m4_case([$2],
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[id], [m4_do([b4_percent_define_get([api.token.prefix])],
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[_b4_symbol([$1], [id])])],
|
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[_b4_symbol($@)])])
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|
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# b4_symbol_if(NUM, FIELD, IF-TRUE, IF-FALSE)
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# -------------------------------------------
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# If FIELD about symbol #NUM is 1 expand IF-TRUE, if is 0, expand IF-FALSE.
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# Otherwise an error.
|
|
m4_define([b4_symbol_if],
|
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[m4_case(b4_symbol([$1], [$2]),
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[1], [$3],
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[0], [$4],
|
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[m4_fatal([$0: field $2 of $1 is not a Boolean:] b4_symbol([$1], [$2]))])])
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|
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|
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# b4_symbol_tag_comment(SYMBOL-NUM)
|
|
# ---------------------------------
|
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# Issue a comment giving the tag of symbol NUM.
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m4_define([b4_symbol_tag_comment],
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[b4_comment([b4_symbol([$1], [tag])])
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])
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|
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# b4_symbol_action(SYMBOL-NUM, KIND)
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# ----------------------------------
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# Run the action KIND (destructor or printer) for SYMBOL-NUM.
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m4_define([b4_symbol_action],
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[b4_symbol_if([$1], [has_$2],
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[b4_dollar_pushdef([(*yyvaluep)],
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[$1],
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[],
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[(*yylocationp)])dnl
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|
_b4_symbol_case([$1])[]dnl
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b4_syncline([b4_symbol([$1], [$2_line])], [b4_symbol([$1], [$2_file])])dnl
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b4_symbol([$1], [$2])
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b4_syncline([@oline@], [@ofile@])dnl
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break;
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b4_dollar_popdef[]dnl
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])])
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|
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# b4_symbol_destructor(SYMBOL-NUM)
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# b4_symbol_printer(SYMBOL-NUM)
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# --------------------------------
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m4_define([b4_symbol_destructor], [b4_symbol_action([$1], [destructor])])
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m4_define([b4_symbol_printer], [b4_symbol_action([$1], [printer])])
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|
|
|
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# b4_symbol_actions(KIND, [TYPE = yytype])
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# ----------------------------------------
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|
# Emit the symbol actions for KIND ("printer" or "destructor").
|
|
# Dispatch on TYPE.
|
|
m4_define([b4_symbol_actions],
|
|
[m4_pushdef([b4_actions_], m4_expand([b4_symbol_foreach([b4_symbol_$1])]))dnl
|
|
m4_ifval(m4_defn([b4_actions_]),
|
|
[switch (m4_default([$2], [yytype]))
|
|
{
|
|
m4_defn([b4_actions_])[]dnl
|
|
default:
|
|
break;
|
|
}dnl
|
|
],
|
|
[YYUSE (m4_default([$2], [yytype]));])dnl
|
|
m4_popdef([b4_actions_])dnl
|
|
])
|
|
|
|
# _b4_symbol_case(SYMBOL-NUM)
|
|
# ---------------------------
|
|
# Issue a "case NUM" for SYMBOL-NUM. Ends with its EOL to make it
|
|
# easier to use with m4_map, but then, use []dnl to suppress the last
|
|
# one.
|
|
m4_define([_b4_symbol_case],
|
|
[case b4_symbol([$1], [number]): b4_symbol_tag_comment([$1])])
|
|
])
|
|
|
|
|
|
# b4_symbol_foreach(MACRO)
|
|
# ------------------------
|
|
# Invoke MACRO(SYMBOL-NUM) for each SYMBOL-NUM.
|
|
m4_define([b4_symbol_foreach],
|
|
[m4_map([$1], m4_defn([b4_symbol_numbers]))])
|
|
|
|
# b4_symbol_map(MACRO)
|
|
# --------------------
|
|
# Return a list (possibly empty elements) of MACRO invoked for each
|
|
# SYMBOL-NUM.
|
|
m4_define([b4_symbol_map],
|
|
[m4_map_args_sep([$1(], [)], [,], b4_symbol_numbers)])
|
|
|
|
|
|
# b4_token_visible_if(NUM, IF-TRUE, IF-FALSE)
|
|
# -------------------------------------------
|
|
# Whether NUM denotes a token that has an exported definition (i.e.,
|
|
# shows in enum yytokentype).
|
|
m4_define([b4_token_visible_if],
|
|
[b4_symbol_if([$1], [is_token],
|
|
[b4_symbol_if([$1], [has_id], [$2], [$3])],
|
|
[$3])])
|
|
|
|
# b4_token_has_definition(NUM)
|
|
# ----------------------------
|
|
# 1 if NUM is visible, nothing otherwise.
|
|
m4_define([b4_token_has_definition],
|
|
[b4_token_visible_if([$1], [1])])
|
|
|
|
# b4_any_token_visible_if([IF-TRUE], [IF-FALSE])
|
|
# ----------------------------------------------
|
|
# Whether there is a token that needs to be defined.
|
|
m4_define([b4_any_token_visible_if],
|
|
[m4_ifval(b4_symbol_foreach([b4_token_has_definition]),
|
|
[$1], [$2])])
|
|
|
|
|
|
# b4_token_format(FORMAT, NUM)
|
|
# ----------------------------
|
|
m4_define([b4_token_format],
|
|
[b4_token_visible_if([$2],
|
|
[m4_quote(m4_format([$1],
|
|
[b4_symbol([$2], [id])],
|
|
[b4_symbol([$2], b4_api_token_raw_if([[number]], [[user_number]]))]))])])
|
|
|
|
|
|
## ------- ##
|
|
## Types. ##
|
|
## ------- ##
|
|
|
|
# _b4_type_action(NUMS)
|
|
# ---------------------
|
|
# Run actions for the symbol NUMS that all have the same type-name.
|
|
# Skip NUMS that have no type-name.
|
|
#
|
|
# To specify the action to run, define b4_dollar_dollar(SYMBOL-NUM,
|
|
# TAG, TYPE).
|
|
m4_define([_b4_type_action],
|
|
[b4_symbol_if([$1], [has_type],
|
|
[m4_map([ _b4_symbol_case], [$@])[]dnl
|
|
b4_dollar_dollar([b4_symbol([$1], [number])],
|
|
[b4_symbol([$1], [tag])],
|
|
[b4_symbol([$1], [type])]);
|
|
break;
|
|
|
|
])])
|
|
|
|
# b4_type_foreach(MACRO)
|
|
# ----------------------
|
|
# Invoke MACRO(SYMBOL-NUMS) for each set of SYMBOL-NUMS for each type set.
|
|
m4_define([b4_type_foreach],
|
|
[m4_map([$1], m4_defn([b4_type_names]))])
|
|
|
|
|
|
|
|
## ----------- ##
|
|
## Synclines. ##
|
|
## ----------- ##
|
|
|
|
# b4_basename(NAME)
|
|
# -----------------
|
|
# Similar to POSIX basename; the differences don't matter here.
|
|
# Beware that NAME is not evaluated.
|
|
m4_define([b4_basename],
|
|
[m4_bpatsubst([$1], [^.*/\([^/]+\)/*$], [\1])])
|
|
|
|
|
|
# b4_syncline(LINE, FILE)dnl
|
|
# --------------------------
|
|
# Should always be following by a dnl.
|
|
#
|
|
# Emit "#line LINE FILE /* __LINE__ __FILE__ */".
|
|
m4_define([b4_syncline],
|
|
[b4_flag_if([synclines],
|
|
[b4_sync_start([$1], [$2])[]dnl
|
|
b4_sync_end([__line__], [b4_basename(m4_quote(__file__))])
|
|
])])
|
|
|
|
# b4_sync_start(LINE, FILE)
|
|
# -----------------------
|
|
# Syncline for the new place. Typically a directive for the compiler.
|
|
m4_define([b4_sync_start], [b4_comment([$2:$1])])
|
|
|
|
# b4_sync_end(LINE, FILE)
|
|
# -----------------------
|
|
# Syncline for the current place, which ends. Typically a comment
|
|
# left for the reader.
|
|
m4_define([b4_sync_end], [ b4_comment([$2:$1])]
|
|
)
|
|
# This generates dependencies on the Bison skeletons hence lots of
|
|
# useless 'git diff'. This location is useless for the regular
|
|
# user (who does not care about the skeletons) and is actually not
|
|
# useful for Bison developpers too (I, Akim, never used this to locate
|
|
# the code in skeletons that generated output). So disable it
|
|
# completely. If someone thinks this was actually useful, a %define
|
|
# variable should be provided to control the level of verbosity of
|
|
# '#line', in replacement of --no-lines.
|
|
m4_define([b4_sync_end])
|
|
|
|
|
|
# b4_user_code(USER-CODE)
|
|
# -----------------------
|
|
# Emit code from the user, ending it with synclines.
|
|
m4_define([b4_user_code],
|
|
[$1
|
|
b4_syncline([@oline@], [@ofile@])])
|
|
|
|
|
|
# b4_define_user_code(MACRO, COMMENT)
|
|
# -----------------------------------
|
|
# From b4_MACRO, if defined, build b4_user_MACRO that includes the synclines.
|
|
m4_define([b4_define_user_code],
|
|
[m4_define([b4_user_$1],
|
|
[m4_ifdef([b4_$1],
|
|
[m4_ifval([$2],
|
|
[b4_comment([$2])
|
|
])b4_user_code([b4_$1])])])])
|
|
|
|
# b4_user_actions
|
|
# b4_user_initial_action
|
|
# b4_user_post_prologue
|
|
# b4_user_pre_prologue
|
|
# b4_user_union_members
|
|
# ----------------------
|
|
# Macros that issue user code, ending with synclines.
|
|
b4_define_user_code([actions])
|
|
b4_define_user_code([initial_action], [User initialization code.])
|
|
b4_define_user_code([post_prologue], [Second part of user prologue.])
|
|
b4_define_user_code([pre_prologue], [First part of user prologue.])
|
|
b4_define_user_code([union_members])
|
|
|
|
|
|
# b4_check_user_names(WHAT, USER-LIST, 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 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.
|
|
#
|
|
# For example, to define b4_foo_user_names to be used for USER-LIST with three
|
|
# name occurrences and with correct quoting:
|
|
#
|
|
# m4_define([b4_foo_user_names],
|
|
# [[[[[[bar]], [[parser.y:1.7]], [[parser.y:1.16]]]],
|
|
# [[[[bar]], [[parser.y:5.7]], [[parser.y:5.16]]]],
|
|
# [[[[baz]], [[parser.y:8.7]], [[parser.y:8.16]]]]]])
|
|
#
|
|
# The macro BISON-NAMESPACE(bar) must be defined iff the name bar of type WHAT
|
|
# is used by Bison (in the front-end or in the skeleton). Empty string names
|
|
# are fine, but it would be ugly for Bison to actually use one.
|
|
#
|
|
# For example, to use b4_foo_bison_names for BISON-NAMESPACE and define that
|
|
# the names bar and baz are used by Bison:
|
|
#
|
|
# m4_define([b4_foo_bison_names(bar)])
|
|
# m4_define([b4_foo_bison_names(baz)])
|
|
#
|
|
# To invoke b4_check_user_names with TYPE foo, with USER-LIST
|
|
# b4_foo_user_names, with BISON-NAMESPACE b4_foo_bison_names, and with correct
|
|
# quoting:
|
|
#
|
|
# b4_check_user_names([[foo]], [b4_foo_user_names],
|
|
# [[b4_foo_bison_names]])
|
|
m4_define([b4_check_user_names],
|
|
[m4_foreach([b4_occurrence], $2,
|
|
[m4_pushdef([b4_occurrence], b4_occurrence)dnl
|
|
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_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_*. ##
|
|
## --------------------- ##
|
|
|
|
|
|
# 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, [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).
|
|
#
|
|
# For example:
|
|
#
|
|
# b4_percent_define_get([[foo]])
|
|
m4_define([b4_percent_define_get],
|
|
[b4_percent_define_use([$1])dnl
|
|
_b4_percent_define_ifdef([$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,
|
|
# 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 appropriate 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([[$0: undefined %%define variable '%s']], [$1])])])
|
|
|
|
# b4_percent_define_get_kind(VARIABLE)
|
|
# ------------------------------------
|
|
# Get the kind (code, keyword, string) of VARIABLE, i.e., how its
|
|
# value was defined (braces, not delimiters, quotes).
|
|
#
|
|
# If the %define variable VARIABLE is undefined, complain fatally
|
|
# since that's a Bison or skeleton error. 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.
|
|
m4_define([b4_percent_define_get_kind],
|
|
[m4_ifdef([b4_percent_define_kind(]$1[)],
|
|
[m4_indir([b4_percent_define_kind(]$1[)])],
|
|
[b4_fatal([[$0: undefined %%define variable '%s']], [$1])])])
|
|
|
|
# b4_percent_define_get_syncline(VARIABLE)dnl
|
|
# -------------------------------------------
|
|
# Should always be following by a dnl.
|
|
#
|
|
# 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([[$0: undefined %%define variable '%s']], [$1])])])
|
|
|
|
# _b4_percent_define_ifdef(VARIABLE, IF-TRUE, [IF-FALSE])
|
|
# ------------------------------------------------------
|
|
# If the %define variable VARIABLE is defined, expand IF-TRUE, else expand
|
|
# IF-FALSE. Don't record usage of VARIABLE.
|
|
#
|
|
# For example:
|
|
#
|
|
# _b4_percent_define_ifdef([[foo]], [[it's defined]], [[it's undefined]])
|
|
m4_define([_b4_percent_define_ifdef],
|
|
[m4_ifdef([b4_percent_define(]$1[)],
|
|
[$2],
|
|
[$3])])
|
|
|
|
# b4_percent_define_ifdef(VARIABLE, IF-TRUE, [IF-FALSE])
|
|
# ------------------------------------------------------
|
|
# 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).
|
|
#
|
|
# For example:
|
|
#
|
|
# b4_percent_define_ifdef([[foo]], [[it's defined]], [[it's undefined]])
|
|
m4_define([b4_percent_define_ifdef],
|
|
[_b4_percent_define_ifdef([$1],
|
|
[b4_percent_define_use([$1])$2],
|
|
[$3])])
|
|
|
|
|
|
# b4_percent_define_check_file_complain(VARIABLE)
|
|
# -----------------------------------------------
|
|
# Warn about %define variable VARIABLE having an incorrect
|
|
# value.
|
|
m4_define([b4_percent_define_check_file_complain],
|
|
[b4_complain_at(b4_percent_define_get_loc([$1]),
|
|
[[%%define variable '%s' requires 'none' or '"..."' values]],
|
|
[$1])])
|
|
|
|
|
|
# b4_percent_define_check_file(MACRO, VARIABLE, DEFAULT)
|
|
# ------------------------------------------------------
|
|
# If the %define variable VARIABLE:
|
|
# - is undefined, then if DEFAULT is non-empty, define MACRO to DEFAULT
|
|
# - is a string, define MACRO to its value
|
|
# - is the keyword 'none', do nothing
|
|
# - otherwise, warn about the incorrect value.
|
|
m4_define([b4_percent_define_check_file],
|
|
[b4_percent_define_ifdef([$2],
|
|
[m4_case(b4_percent_define_get_kind([$2]),
|
|
[string],
|
|
[m4_define([$1], b4_percent_define_get([$2]))],
|
|
[keyword],
|
|
[m4_if(b4_percent_define_get([$2]), [none], [],
|
|
[b4_percent_define_check_file_complain([$2])])],
|
|
[b4_percent_define_check_file_complain([$2])])
|
|
],
|
|
[m4_ifval([$3],
|
|
[m4_define([$1], [$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,
|
|
# 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
|
|
# already) or defined to any other value (possibly a user error). Also, record
|
|
# Bison's usage of VARIABLE by defining
|
|
# b4_percent_define_bison_variables(VARIABLE).
|
|
#
|
|
# For example:
|
|
#
|
|
# b4_percent_define_flag_if([[foo]], [[it's true]], [[it's false]])
|
|
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([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([[$0: undefined %%define variable '%s']], [$1])])])
|
|
|
|
|
|
# b4_percent_define_default(VARIABLE, DEFAULT, [KIND = keyword])
|
|
# --------------------------------------------------------------
|
|
# 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.
|
|
#
|
|
# For example:
|
|
#
|
|
# b4_percent_define_default([[foo]], [[default value]])
|
|
m4_define([b4_percent_define_default],
|
|
[_b4_percent_define_ifdef([$1], [],
|
|
[m4_define([b4_percent_define(]$1[)], [$2])dnl
|
|
m4_define([b4_percent_define_kind(]$1[)],
|
|
[m4_default([$3], [keyword])])dnl
|
|
m4_define([b4_percent_define_loc(]$1[)],
|
|
[[[[<skeleton default value>:-1.-1]],
|
|
[[<skeleton default value>:-1.-1]]]])dnl
|
|
m4_define([b4_percent_define_syncline(]$1[)], [[]])])])
|
|
|
|
|
|
# b4_percent_define_if_define(NAME, [VARIABLE = NAME])
|
|
# ----------------------------------------------------
|
|
# Define b4_NAME_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(m4_default([$2], [$1]),
|
|
[$3], [$4])])])
|
|
m4_define([b4_percent_define_if_define],
|
|
[b4_percent_define_default([m4_default([$2], [$1])], [[false]])
|
|
_b4_percent_define_if_define([$1], [$2], $[1], $[2])])
|
|
|
|
|
|
# b4_percent_define_check_kind(VARIABLE, KIND, [DIAGNOSTIC = complain])
|
|
# ---------------------------------------------------------------------
|
|
m4_define([b4_percent_define_check_kind],
|
|
[_b4_percent_define_ifdef([$1],
|
|
[m4_if(b4_percent_define_get_kind([$1]), [$2], [],
|
|
[b4_error([m4_default([$3], [complain])],
|
|
b4_percent_define_get_loc([$1]),
|
|
[m4_case([$2],
|
|
[code], [[%%define variable '%s' requires '{...}' values]],
|
|
[keyword], [[%%define variable '%s' requires keyword values]],
|
|
[string], [[%%define variable '%s' requires '"..."' values]])],
|
|
[$1])])])dnl
|
|
])
|
|
|
|
|
|
# b4_percent_define_check_values(VALUES)
|
|
# --------------------------------------
|
|
# Mimic muscle_percent_define_check_values in ../src/muscle-tab.h exactly
|
|
# except that the VALUES structure is more appropriate for M4. That is, VALUES
|
|
# is a list of sublists of strings. For each sublist, the first string is the
|
|
# name of a %define variable, and all remaining strings in that sublist are the
|
|
# valid values for that variable. Complain if such a variable is undefined (a
|
|
# Bison error since the default value should have been set already) or defined
|
|
# to any other value (possibly a user error). Don't record this as a Bison
|
|
# usage of the variable as there's no reason to suspect that the value has yet
|
|
# influenced the output.
|
|
#
|
|
# For example:
|
|
#
|
|
# b4_percent_define_check_values([[[[foo]], [[foo-value1]], [[foo-value2]]]],
|
|
# [[[[bar]], [[bar-value1]]]])
|
|
m4_define([b4_percent_define_check_values],
|
|
[m4_foreach([b4_sublist], m4_quote($@),
|
|
[_b4_percent_define_check_values(b4_sublist)])])
|
|
|
|
m4_define([_b4_percent_define_check_values],
|
|
[_b4_percent_define_ifdef([$1],
|
|
[b4_percent_define_check_kind(]$1[, [keyword], [deprecated])dnl
|
|
m4_pushdef([b4_good_value], [0])dnl
|
|
m4_if($#, 1, [],
|
|
[m4_foreach([b4_value], m4_dquote(m4_shift($@)),
|
|
[m4_if(m4_indir([b4_percent_define(]$1[)]), b4_value,
|
|
[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']],
|
|
[$1],
|
|
m4_dquote(m4_indir([b4_percent_define(]$1[)])))
|
|
m4_foreach([b4_value], m4_dquote(m4_shift($@)),
|
|
[b4_error([[note]], b4_percent_define_get_loc([$1]), []
|
|
[[accepted value: '%s']],
|
|
m4_dquote(b4_value))])])dnl
|
|
m4_popdef([b4_good_value])],
|
|
[b4_fatal([[$0: undefined %%define variable '%s']], [$1])])])
|
|
|
|
# b4_percent_code_get([QUALIFIER])
|
|
# --------------------------------
|
|
# If any %code blocks for QUALIFIER are defined, emit them beginning with a
|
|
# comment and ending with synclines and a newline. If QUALIFIER is not
|
|
# specified or empty, do this for the unqualified %code blocks. Also, record
|
|
# Bison's usage of QUALIFIER (if specified) by defining
|
|
# b4_percent_code_bison_qualifiers(QUALIFIER).
|
|
#
|
|
# For example, to emit any unqualified %code blocks followed by any %code
|
|
# blocks for the qualifier foo:
|
|
#
|
|
# b4_percent_code_get
|
|
# b4_percent_code_get([[foo]])
|
|
m4_define([b4_percent_code_get],
|
|
[m4_pushdef([b4_macro_name], [[b4_percent_code(]$1[)]])dnl
|
|
m4_ifval([$1], [m4_define([b4_percent_code_bison_qualifiers(]$1[)])])dnl
|
|
m4_ifdef(b4_macro_name,
|
|
[b4_comment(m4_if([$#], [0], [[[Unqualified %code blocks.]]],
|
|
[[["%code ]$1[" blocks.]]]))
|
|
b4_user_code([m4_indir(b4_macro_name)])])dnl
|
|
m4_popdef([b4_macro_name])])
|
|
|
|
# b4_percent_code_ifdef(QUALIFIER, IF-TRUE, [IF-FALSE])
|
|
# -----------------------------------------------------
|
|
# If any %code blocks for QUALIFIER (or unqualified %code blocks if
|
|
# QUALIFIER is empty) are defined, expand IF-TRUE, else expand IF-FALSE.
|
|
# Also, record Bison's usage of QUALIFIER (if specified) by defining
|
|
# b4_percent_code_bison_qualifiers(QUALIFIER).
|
|
m4_define([b4_percent_code_ifdef],
|
|
[m4_ifdef([b4_percent_code(]$1[)],
|
|
[m4_ifval([$1], [m4_define([b4_percent_code_bison_qualifiers(]$1[)])])$2],
|
|
[$3])])
|
|
|
|
|
|
## ------------------ ##
|
|
## Common variables. ##
|
|
## ------------------ ##
|
|
|
|
|
|
# b4_parse_assert_if([IF-ASSERTIONS-ARE-USED], [IF-NOT])
|
|
# b4_parse_trace_if([IF-DEBUG-TRACES-ARE-ENABLED], [IF-NOT])
|
|
# b4_token_ctor_if([IF-YYLEX-RETURNS-A-TOKEN], [IF-NOT])
|
|
# ----------------------------------------------------------
|
|
b4_percent_define_if_define([api.token.raw])
|
|
b4_percent_define_if_define([token_ctor], [api.token.constructor])
|
|
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_bison_locations_if([IF-TRUE])
|
|
# --------------------------------
|
|
# Expand IF-TRUE if using locations, and using the default location
|
|
# type.
|
|
m4_define([b4_bison_locations_if],
|
|
[b4_locations_if([b4_percent_define_ifdef([[api.location.type]], [], [$1])])])
|
|
|
|
|
|
# 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])
|
|
|
|
# yytoken_table is needed to support verbose errors.
|
|
b4_error_verbose_if([m4_define([b4_token_table_flag], [1])])
|
|
|
|
|
|
# b4_variant_if([IF-VARIANT-ARE-USED], [IF-NOT])
|
|
# ----------------------------------------------
|
|
b4_percent_define_if_define([variant])
|
|
m4_define([b4_variant_flag], [[0]])
|
|
b4_percent_define_ifdef([[api.value.type]],
|
|
[m4_case(b4_percent_define_get_kind([[api.value.type]]), [keyword],
|
|
[m4_case(b4_percent_define_get([[api.value.type]]), [variant],
|
|
[m4_define([b4_variant_flag], [[1]])])])])
|
|
b4_define_flag_if([variant])
|
|
|
|
|
|
## ----------------------------------------------------------- ##
|
|
## After processing the skeletons, check that all the user's ##
|
|
## %define variables and %code qualifiers were used by Bison. ##
|
|
## ----------------------------------------------------------- ##
|
|
|
|
m4_define([b4_check_user_names_wrap],
|
|
[m4_ifdef([b4_percent_]$1[_user_]$2[s],
|
|
[b4_check_user_names([[%]$1 $2],
|
|
[b4_percent_]$1[_user_]$2[s],
|
|
[[b4_percent_]$1[_bison_]$2[s]])])])
|
|
|
|
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_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. ##
|
|
## --------------- ##
|
|
|
|
# api.location.type={...} (C, C++ and Java).
|
|
b4_percent_define_check_kind([api.location.type], [code], [deprecated])
|
|
|
|
# api.position.type={...} (Java).
|
|
b4_percent_define_check_kind([api.position.type], [code], [deprecated])
|
|
|
|
# api.prefix >< %name-prefix.
|
|
b4_percent_define_check_kind([api.prefix], [code], [deprecated])
|
|
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])])])
|
|
|
|
# api.token.prefix={...}
|
|
# Make it a warning for those who used betas of Bison 3.0.
|
|
b4_percent_define_check_kind([api.token.prefix], [code], [deprecated])
|
|
|
|
# api.value.type >< %union.
|
|
b4_percent_define_ifdef([api.value.type],
|
|
[m4_ifdef([b4_union_members],
|
|
[b4_complain_at(b4_percent_define_get_loc([api.value.type]),
|
|
[['%s' and '%s' cannot be used together]],
|
|
[%union],
|
|
[%define api.value.type])])])
|
|
|
|
# api.value.type=union >< %yacc.
|
|
b4_percent_define_ifdef([api.value.type],
|
|
[m4_if(b4_percent_define_get([api.value.type]), [union],
|
|
[b4_yacc_if(dnl
|
|
[b4_complain_at(b4_percent_define_get_loc([api.value.type]),
|
|
[['%s' and '%s' cannot be used together]],
|
|
[%yacc],
|
|
[%define api.value.type "union"])])])])
|
|
|
|
# api.value.union.name.
|
|
b4_percent_define_check_kind([api.value.union.name], [keyword])
|