| 1 | -*- Autoconf -*-
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| 2 |
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| 3 | # Language-independent M4 Macros for Bison.
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| 4 | # Copyright (C) 2002, 2004, 2005, 2006, 2007, 2008 Free Software Foundation,
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| 5 | # Inc.
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| 6 |
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| 7 | # This program is free software: you can redistribute it and/or modify
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| 8 | # it under the terms of the GNU General Public License as published by
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| 9 | # the Free Software Foundation, either version 3 of the License, or
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| 10 | # (at your option) any later version.
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| 11 | #
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| 12 | # This program is distributed in the hope that it will be useful,
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| 13 | # but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 14 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 15 | # GNU General Public License for more details.
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| 16 | #
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| 17 | # You should have received a copy of the GNU General Public License
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| 18 | # along with this program. If not, see <http://www.gnu.org/licenses/>.
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| 19 |
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| 20 |
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| 21 | ## ---------------- ##
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| 22 | ## Identification. ##
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| 23 | ## ---------------- ##
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| 24 |
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| 25 | # b4_copyright(TITLE, YEARS)
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| 26 | # --------------------------
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| 27 | m4_define([b4_copyright],
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| 28 | [b4_comment([A Bison parser, made by GNU Bison b4_version.])
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| 29 |
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| 30 | b4_comment([$1
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| 31 |
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| 32 | m4_text_wrap([Copyright (C) $2 Free Software Foundation, Inc.], [ ])
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| 33 |
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| 34 | This program is free software: you can redistribute it and/or modify
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| 35 | it under the terms of the GNU General Public License as published by
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| 36 | the Free Software Foundation, either version 3 of the License, or
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| 37 | (at your option) any later version.
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| 38 |
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| 39 | This program is distributed in the hope that it will be useful,
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| 40 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 41 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 42 | GNU General Public License for more details.
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| 43 |
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| 44 | You should have received a copy of the GNU General Public License
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| 45 | along with this program. If not, see <http://www.gnu.org/licenses/>.])
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| 46 |
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| 47 | b4_comment([As a special exception, you may create a larger work that contains
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| 48 | part or all of the Bison parser skeleton and distribute that work
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| 49 | under terms of your choice, so long as that work isn't itself a
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| 50 | parser generator using the skeleton or a modified version thereof
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| 51 | as a parser skeleton. Alternatively, if you modify or redistribute
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| 52 | the parser skeleton itself, you may (at your option) remove this
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| 53 | special exception, which will cause the skeleton and the resulting
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| 54 | Bison output files to be licensed under the GNU General Public
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| 55 | License without this special exception.
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| 56 |
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| 57 | This special exception was added by the Free Software Foundation in
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| 58 | version 2.2 of Bison.])])
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| 59 |
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| 60 |
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| 61 | ## ---------------- ##
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| 62 | ## Error handling. ##
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| 63 | ## ---------------- ##
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| 64 |
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| 65 | # The following error handling macros print error directives that should not
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| 66 | # become arguments of other macro invocations since they would likely then be
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| 67 | # mangled. Thus, they print to stdout directly.
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| 68 |
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| 69 | # b4_cat(TEXT)
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| 70 | # ------------
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| 71 | # Write TEXT to stdout. Precede the final newline with an @ so that it's
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| 72 | # escaped. For example:
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| 73 | #
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| 74 | # b4_cat([[@complain(invalid input@)]])
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| 75 | m4_define([b4_cat],
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| 76 | [m4_syscmd([cat <<'_m4eof'
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| 77 | ]m4_bpatsubst(m4_dquote($1), [_m4eof], [_m4@`eof])[@
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| 78 | _m4eof
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| 79 | ])dnl
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| 80 | m4_if(m4_sysval, [0], [], [m4_fatal([$0: cannot write to stdout])])])
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| 81 |
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| 82 | # b4_error(KIND, FORMAT, [ARG1], [ARG2], ...)
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| 83 | # -------------------------------------------
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| 84 | # Write @KIND(FORMAT@,ARG1@,ARG2@,...@) to stdout.
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| 85 | #
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| 86 | # For example:
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| 87 | #
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| 88 | # b4_error([[warn]], [[invalid value for `%s': %s]], [[foo]], [[3]])
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| 89 | m4_define([b4_error],
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| 90 | [b4_cat([[@]$1[(]$2[]]dnl
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| 91 | [m4_if([$#], [2], [],
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| 92 | [m4_foreach([b4_arg],
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| 93 | m4_dquote(m4_shift(m4_shift($@))),
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| 94 | [[@,]b4_arg])])[@)]])])
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| 95 |
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| 96 | # b4_error_at(KIND, START, END, FORMAT, [ARG1], [ARG2], ...)
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| 97 | # ----------------------------------------------------------
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| 98 | # Write @KIND_at(START@,END@,FORMAT@,ARG1@,ARG2@,...@) to stdout.
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| 99 | #
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| 100 | # For example:
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| 101 | #
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| 102 | # b4_error_at([[complain]], [[input.y:2.3]], [[input.y:5.4]],
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| 103 | # [[invalid %s]], [[foo]])
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| 104 | m4_define([b4_error_at],
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| 105 | [b4_cat([[@]$1[_at(]$2[@,]$3[@,]$4[]]dnl
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| 106 | [m4_if([$#], [4], [],
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| 107 | [m4_foreach([b4_arg],
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| 108 | m4_dquote(m4_shift(m4_shift(m4_shift(m4_shift($@))))),
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| 109 | [[@,]b4_arg])])[@)]])])
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| 110 |
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| 111 | # b4_warn(FORMAT, [ARG1], [ARG2], ...)
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| 112 | # ------------------------------------
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| 113 | # Write @warn(FORMAT@,ARG1@,ARG2@,...@) to stdout.
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| 114 | #
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| 115 | # For example:
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| 116 | #
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| 117 | # b4_warn([[invalid value for `%s': %s]], [[foo]], [[3]])
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| 118 | #
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| 119 | # As a simple test suite, this:
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| 120 | #
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| 121 | # m4_divert(-1)
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| 122 | # m4_define([asdf], [ASDF])
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| 123 | # m4_define([fsa], [FSA])
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| 124 | # m4_define([fdsa], [FDSA])
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| 125 | # b4_warn([[[asdf), asdf]]], [[[fsa), fsa]]], [[[fdsa), fdsa]]])
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| 126 | # b4_warn([[asdf), asdf]], [[fsa), fsa]], [[fdsa), fdsa]])
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| 127 | # b4_warn()
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| 128 | # b4_warn(1)
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| 129 | # b4_warn(1, 2)
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| 130 | #
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| 131 | # Should produce this without newlines:
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| 132 | #
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| 133 | # @warn([asdf), asdf]@,[fsa), fsa]@,[fdsa), fdsa]@)
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| 134 | # @warn(asdf), asdf@,fsa), fsa@,fdsa), fdsa@)
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| 135 | # @warn(@)
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| 136 | # @warn(1@)
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| 137 | # @warn(1@,2@)
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| 138 | m4_define([b4_warn],
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| 139 | [b4_error([[warn]], $@)])
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| 140 |
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| 141 | # b4_warn_at(START, END, FORMAT, [ARG1], [ARG2], ...)
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| 142 | # ---------------------------------------------------
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| 143 | # Write @warn(START@,END@,FORMAT@,ARG1@,ARG2@,...@) to stdout.
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| 144 | #
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| 145 | # For example:
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| 146 | #
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| 147 | # b4_warn_at([[input.y:2.3]], [[input.y:5.4]], [[invalid %s]], [[foo]])
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| 148 | m4_define([b4_warn_at],
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| 149 | [b4_error_at([[warn]], $@)])
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| 150 |
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| 151 | # b4_complain(FORMAT, [ARG1], [ARG2], ...)
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| 152 | # ----------------------------------------
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| 153 | # Write @complain(FORMAT@,ARG1@,ARG2@,...@) to stdout.
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| 154 | #
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| 155 | # See b4_warn example.
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| 156 | m4_define([b4_complain],
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| 157 | [b4_error([[complain]], $@)])
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| 158 |
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| 159 | # b4_complain_at(START, END, FORMAT, [ARG1], [ARG2], ...)
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| 160 | # -------------------------------------------------------
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| 161 | # Write @complain(START@,END@,FORMAT@,ARG1@,ARG2@,...@) to stdout.
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| 162 | #
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| 163 | # See b4_warn_at example.
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| 164 | m4_define([b4_complain_at],
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| 165 | [b4_error_at([[complain]], $@)])
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| 166 |
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| 167 | # b4_fatal(FORMAT, [ARG1], [ARG2], ...)
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| 168 | # -------------------------------------
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| 169 | # Write @fatal(FORMAT@,ARG1@,ARG2@,...@) to stdout and exit.
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| 170 | #
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| 171 | # See b4_warn example.
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| 172 | m4_define([b4_fatal],
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| 173 | [b4_error([[fatal]], $@)dnl
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| 174 | m4_exit(1)])
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| 175 |
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| 176 | # b4_fatal_at(START, END, FORMAT, [ARG1], [ARG2], ...)
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| 177 | # ----------------------------------------------------
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| 178 | # Write @fatal(START@,END@,FORMAT@,ARG1@,ARG2@,...@) to stdout and exit.
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| 179 | #
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| 180 | # See b4_warn_at example.
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| 181 | m4_define([b4_fatal_at],
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| 182 | [b4_error_at([[fatal]], $@)dnl
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| 183 | m4_exit(1)])
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| 184 |
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| 185 |
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| 186 | ## ---------------- ##
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| 187 | ## Default values. ##
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| 188 | ## ---------------- ##
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| 189 |
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| 190 | # m4_define_default([b4_lex_param], []) dnl breaks other skeletons
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| 191 | m4_define_default([b4_pre_prologue], [])
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| 192 | m4_define_default([b4_post_prologue], [])
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| 193 | m4_define_default([b4_epilogue], [])
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| 194 | m4_define_default([b4_parse_param], [])
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| 195 |
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| 196 | # The initial column and line.
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| 197 | m4_define_default([b4_location_initial_column], [1])
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| 198 | m4_define_default([b4_location_initial_line], [1])
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| 199 |
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| 200 |
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| 201 | ## ------------ ##
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| 202 | ## Data Types. ##
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| 203 | ## ------------ ##
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| 204 |
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| 205 | # b4_ints_in(INT1, INT2, LOW, HIGH)
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| 206 | # ---------------------------------
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| 207 | # Return 1 iff both INT1 and INT2 are in [LOW, HIGH], 0 otherwise.
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| 208 | m4_define([b4_ints_in],
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| 209 | [m4_eval([$3 <= $1 && $1 <= $4 && $3 <= $2 && $2 <= $4])])
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| 210 |
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| 211 |
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| 212 |
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| 213 | ## ------------------ ##
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| 214 | ## Decoding options. ##
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| 215 | ## ------------------ ##
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| 216 |
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| 217 | # b4_flag_if(FLAG, IF-TRUE, IF-FALSE)
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| 218 | # -----------------------------------
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| 219 | # Run IF-TRUE if b4_FLAG_flag is 1, IF-FALSE if FLAG is 0, otherwise fail.
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| 220 | m4_define([b4_flag_if],
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| 221 | [m4_case(b4_$1_flag,
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| 222 | [0], [$3],
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| 223 | [1], [$2],
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| 224 | [m4_fatal([invalid $1 value: ]$1)])])
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| 225 |
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| 226 |
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| 227 | # b4_define_flag_if(FLAG)
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| 228 | # -----------------------
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| 229 | # Define "b4_FLAG_if(IF-TRUE, IF-FALSE)" that depends on the
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| 230 | # value of the Boolean FLAG.
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| 231 | m4_define([b4_define_flag_if],
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| 232 | [_b4_define_flag_if($[1], $[2], [$1])])
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| 233 |
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| 234 | # _b4_define_flag_if($1, $2, FLAG)
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| 235 | # --------------------------------
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| 236 | # This macro works around the impossibility to define macros
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| 237 | # inside macros, because issuing `[$1]' is not possible in M4 :(.
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| 238 | # This sucks hard, GNU M4 should really provide M5 like $$1.
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| 239 | m4_define([_b4_define_flag_if],
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| 240 | [m4_if([$1$2], $[1]$[2], [],
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| 241 | [m4_fatal([$0: Invalid arguments: $@])])dnl
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| 242 | m4_define([b4_$3_if],
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| 243 | [b4_flag_if([$3], [$1], [$2])])])
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| 244 |
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| 245 |
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| 246 | # b4_FLAG_if(IF-TRUE, IF-FALSE)
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| 247 | # -----------------------------
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| 248 | # Expand IF-TRUE, if FLAG is true, IF-FALSE otherwise.
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| 249 | b4_define_flag_if([defines]) # Whether headers are requested.
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| 250 | b4_define_flag_if([error_verbose]) # Whether error are verbose.
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| 251 | b4_define_flag_if([glr]) # Whether a GLR parser is requested.
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| 252 | b4_define_flag_if([locations]) # Whether locations are tracked.
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| 253 | b4_define_flag_if([nondeterministic]) # Whether conflicts should be handled.
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| 254 | b4_define_flag_if([yacc]) # Whether POSIX Yacc is emulated.
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| 255 |
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| 256 |
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| 257 | ## ------------------------- ##
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| 258 | ## Assigning token numbers. ##
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| 259 | ## ------------------------- ##
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| 260 |
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| 261 |
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| 262 | ## ----------- ##
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| 263 | ## Synclines. ##
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| 264 | ## ----------- ##
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| 265 |
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| 266 | # b4_basename(NAME)
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| 267 | # -----------------
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| 268 | # Similar to POSIX basename; the differences don't matter here.
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| 269 | # Beware that NAME is not evaluated.
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| 270 | m4_define([b4_basename],
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| 271 | [m4_bpatsubst([$1], [^.*/\([^/]+\)/*$], [\1])])
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| 272 |
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| 273 |
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| 274 | # b4_syncline(LINE, FILE)
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| 275 | # -----------------------
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| 276 | m4_define([b4_syncline],
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| 277 | [b4_flag_if([synclines], [
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| 278 | b4_sync_end([__line__], [b4_basename(m4_quote(__file__))])
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| 279 | b4_sync_start([$1], [$2])])])
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| 280 |
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| 281 | m4_define([b4_sync_end], [b4_comment([Line $1 of $2])])
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| 282 | m4_define([b4_sync_start], [b4_comment([Line $1 of $2])])
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| 283 |
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| 284 | # b4_user_code(USER-CODE)
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| 285 | # -----------------------
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| 286 | # Emit code from the user, ending it with synclines.
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| 287 | m4_define([b4_user_code],
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| 288 | [$1
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| 289 | b4_syncline([@oline@], [@ofile@])])
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| 290 |
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| 291 |
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| 292 | # b4_define_user_code(MACRO)
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| 293 | # --------------------------
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| 294 | # From b4_MACRO, build b4_user_MACRO that includes the synclines.
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| 295 | m4_define([b4_define_user_code],
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| 296 | [m4_define([b4_user_$1],
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| 297 | [b4_user_code([b4_$1])])])
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| 298 |
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| 299 |
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| 300 | # b4_user_actions
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| 301 | # b4_user_initial_action
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| 302 | # b4_user_post_prologue
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| 303 | # b4_user_pre_prologue
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| 304 | # b4_user_stype
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| 305 | # ----------------------
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| 306 | # Macros that issue user code, ending with synclines.
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| 307 | b4_define_user_code([actions])
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| 308 | b4_define_user_code([initial_action])
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| 309 | b4_define_user_code([post_prologue])
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| 310 | b4_define_user_code([pre_prologue])
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| 311 | b4_define_user_code([stype])
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| 312 |
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| 313 |
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| 314 | # b4_check_user_names(WHAT, USER-LIST, BISON-NAMESPACE)
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| 315 | # --------------------------------------------------------
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| 316 | # Warn if any name of type WHAT is used by the user (as recorded in USER-LIST)
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| 317 | # but is not used by Bison (as recorded by macros in the namespace
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| 318 | # BISON-NAMESPACE).
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| 319 | #
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| 320 | # USER-LIST must expand to a list specifying all grammar occurrences of all
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| 321 | # names of type WHAT. Each item in the list must be a triplet specifying one
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| 322 | # occurrence: name, start boundary, and end boundary. Empty string names are
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| 323 | # fine. An empty list is fine.
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| 324 | #
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| 325 | # For example, to define b4_foo_user_names to be used for USER-LIST with three
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| 326 | # name occurrences and with correct quoting:
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| 327 | #
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| 328 | # m4_define([b4_foo_user_names],
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| 329 | # [[[[[[bar]], [[parser.y:1.7]], [[parser.y:1.16]]]],
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| 330 | # [[[[bar]], [[parser.y:5.7]], [[parser.y:5.16]]]],
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| 331 | # [[[[baz]], [[parser.y:8.7]], [[parser.y:8.16]]]]]])
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| 332 | #
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| 333 | # The macro BISON-NAMESPACE(bar) must be defined iff the name bar of type WHAT
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| 334 | # is used by Bison (in the front-end or in the skeleton). Empty string names
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| 335 | # are fine, but it would be ugly for Bison to actually use one.
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| 336 | #
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| 337 | # For example, to use b4_foo_bison_names for BISON-NAMESPACE and define that
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| 338 | # the names bar and baz are used by Bison:
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| 339 | #
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| 340 | # m4_define([b4_foo_bison_names(bar)])
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| 341 | # m4_define([b4_foo_bison_names(baz)])
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| 342 | #
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| 343 | # To invoke b4_check_user_names with TYPE foo, with USER-LIST
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| 344 | # b4_foo_user_names, with BISON-NAMESPACE b4_foo_bison_names, and with correct
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| 345 | # quoting:
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| 346 | #
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| 347 | # b4_check_user_names([[foo]], [b4_foo_user_names],
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| 348 | # [[b4_foo_bison_names]])
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| 349 | m4_define([b4_check_user_names],
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| 350 | [m4_foreach([b4_occurrence], $2,
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| 351 | [m4_pushdef([b4_occurrence], b4_occurrence)dnl
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| 352 | m4_pushdef([b4_user_name], m4_car(b4_occurrence))dnl
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| 353 | m4_pushdef([b4_start], m4_car(m4_shift(b4_occurrence)))dnl
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| 354 | m4_pushdef([b4_end], m4_shift(m4_shift(b4_occurrence)))dnl
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| 355 | m4_ifndef($3[(]m4_quote(b4_user_name)[)],
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| 356 | [b4_warn_at([b4_start], [b4_end],
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| 357 | [[%s `%s' is not used]],
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| 358 | [$1], [b4_user_name])])[]dnl
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| 359 | m4_popdef([b4_occurrence])dnl
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| 360 | m4_popdef([b4_user_name])dnl
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| 361 | m4_popdef([b4_start])dnl
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| 362 | m4_popdef([b4_end])dnl
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| 363 | ])])
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| 364 |
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| 365 | # b4_percent_define_get(VARIABLE)
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| 366 | # -------------------------------
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| 367 | # Mimic muscle_percent_define_get in ../src/muscle_tab.h exactly. That is, if
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| 368 | # the %define variable VARIABLE is defined, emit its value. Also, record
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| 369 | # Bison's usage of VARIABLE by defining
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| 370 | # b4_percent_define_bison_variables(VARIABLE).
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| 371 | #
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| 372 | # For example:
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| 373 | #
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| 374 | # b4_percent_define_get([[foo]])
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| 375 | m4_define([b4_percent_define_get],
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| 376 | [m4_define([b4_percent_define_bison_variables(]$1[)])dnl
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| 377 | m4_ifdef([b4_percent_define(]$1[)], [m4_indir([b4_percent_define(]$1[)])])])
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| 378 |
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| 379 | # b4_percent_define_get_loc(VARIABLE)
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| 380 | # -----------------------------------
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| 381 | # Mimic muscle_percent_define_get_loc in ../src/muscle_tab.h exactly. That is,
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| 382 | # if the %define variable VARIABLE is undefined, complain fatally since that's
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| 383 | # a Bison or skeleton error. Otherwise, return its definition location in a
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| 384 | # form approriate for the first two arguments of b4_warn_at, b4_complain_at, or
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| 385 | # b4_fatal_at. Don't record this as a Bison usage of VARIABLE as there's no
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| 386 | # reason to suspect that the user-supplied value has yet influenced the output.
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| 387 | #
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| 388 | # For example:
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| 389 | #
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| 390 | # b4_complain_at(b4_percent_define_get_loc([[foo]]), [[invalid foo]])
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| 391 | m4_define([b4_percent_define_get_loc],
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| 392 | [m4_ifdef([b4_percent_define_loc(]$1[)],
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| 393 | [m4_pushdef([b4_loc], m4_indir([b4_percent_define_loc(]$1[)]))dnl
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| 394 | b4_loc[]dnl
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| 395 | m4_popdef([b4_loc])],
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| 396 | [b4_fatal([[undefined %%define variable `%s' passed to b4_percent_define_get_loc]], [$1])])])
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| 397 |
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| 398 | # b4_percent_define_get_syncline(VARIABLE)
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| 399 | # ----------------------------------------
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| 400 | # Mimic muscle_percent_define_get_syncline in ../src/muscle_tab.h exactly.
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| 401 | # That is, if the %define variable VARIABLE is undefined, complain fatally
|
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| 402 | # since that's a Bison or skeleton error. Otherwise, return its definition
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| 403 | # location as a b4_syncline invocation. Don't record this as a Bison usage of
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| 404 | # VARIABLE as there's no reason to suspect that the user-supplied value has yet
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| 405 | # influenced the output.
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| 406 | #
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| 407 | # For example:
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| 408 | #
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| 409 | # b4_percent_define_get_syncline([[foo]])
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| 410 | m4_define([b4_percent_define_get_syncline],
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| 411 | [m4_ifdef([b4_percent_define_syncline(]$1[)],
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| 412 | [m4_indir([b4_percent_define_syncline(]$1[)])],
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| 413 | [b4_fatal([[undefined %%define variable `%s' passed to b4_percent_define_get_syncline]], [$1])])])
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| 414 |
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| 415 | # b4_percent_define_ifdef(VARIABLE, IF-TRUE, [IF-FALSE])
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| 416 | # ------------------------------------------------------
|
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| 417 | # Mimic muscle_percent_define_ifdef in ../src/muscle_tab.h exactly. That is,
|
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| 418 | # if the %define variable VARIABLE is defined, expand IF-TRUE, else expand
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| 419 | # IF-FALSE. Also, record Bison's usage of VARIABLE by defining
|
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| 420 | # b4_percent_define_bison_variables(VARIABLE).
|
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| 421 | #
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| 422 | # For example:
|
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| 423 | #
|
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| 424 | # b4_percent_define_ifdef([[foo]], [[it's defined]], [[it's undefined]])
|
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| 425 | m4_define([b4_percent_define_ifdef],
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| 426 | [m4_ifdef([b4_percent_define(]$1[)],
|
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| 427 | [m4_define([b4_percent_define_bison_variables(]$1[)])$2],
|
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| 428 | [$3])])
|
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| 429 |
|
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| 430 | # b4_percent_define_flag_if(VARIABLE, IF-TRUE, [IF-FALSE])
|
|---|
| 431 | # --------------------------------------------------------
|
|---|
| 432 | # Mimic muscle_percent_define_flag_if in ../src/muscle_tab.h exactly. That is,
|
|---|
| 433 | # if the %define variable VARIABLE is defined to "" or "true", expand IF-TRUE.
|
|---|
| 434 | # If it is defined to "false", expand IF-FALSE. Complain if it is undefined
|
|---|
| 435 | # (a Bison or skeleton error since the default value should have been set
|
|---|
| 436 | # already) or defined to any other value (possibly a user error). Also, record
|
|---|
| 437 | # Bison's usage of VARIABLE by defining
|
|---|
| 438 | # b4_percent_define_bison_variables(VARIABLE).
|
|---|
| 439 | #
|
|---|
| 440 | # For example:
|
|---|
| 441 | #
|
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| 442 | # b4_percent_define_flag_if([[foo]], [[it's true]], [[it's false]])
|
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| 443 | m4_define([b4_percent_define_flag_if],
|
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| 444 | [b4_percent_define_ifdef([$1],
|
|---|
| 445 | [m4_case(b4_percent_define_get([$1]),
|
|---|
| 446 | [], [$2], [true], [$2], [false], [$3],
|
|---|
| 447 | [m4_expand_once([b4_complain_at(b4_percent_define_get_loc([$1]),
|
|---|
| 448 | [[invalid value for %%define Boolean variable `%s']],
|
|---|
| 449 | [$1])],
|
|---|
| 450 | [[b4_percent_define_flag_if($1)]])])],
|
|---|
| 451 | [b4_fatal([[undefined %%define variable `%s' passed to b4_percent_define_flag_if]], [$1])])])
|
|---|
| 452 |
|
|---|
| 453 | # b4_percent_define_default(VARIABLE, DEFAULT)
|
|---|
| 454 | # --------------------------------------------
|
|---|
| 455 | # Mimic muscle_percent_define_default in ../src/muscle_tab.h exactly. That is,
|
|---|
| 456 | # if the %define variable VARIABLE is undefined, set its value to DEFAULT.
|
|---|
| 457 | # Don't record this as a Bison usage of VARIABLE as there's no reason to
|
|---|
| 458 | # suspect that the value has yet influenced the output.
|
|---|
| 459 | #
|
|---|
| 460 | # For example:
|
|---|
| 461 | #
|
|---|
| 462 | # b4_percent_define_default([[foo]], [[default value]])
|
|---|
| 463 | m4_define([b4_percent_define_default],
|
|---|
| 464 | [m4_ifndef([b4_percent_define(]$1[)],
|
|---|
| 465 | [m4_define([b4_percent_define(]$1[)], [$2])dnl
|
|---|
| 466 | m4_define([b4_percent_define_loc(]$1[)],
|
|---|
| 467 | [[[[[Bison:b4_percent_define_default]:1.0]], [[[Bison:b4_percent_define_default]:1.0]]]])dnl
|
|---|
| 468 | m4_define([b4_percent_define_syncline(]$1[)],
|
|---|
| 469 | [[]b4_syncline(1, [["[Bison:b4_percent_define_default]"]])[
|
|---|
| 470 | ]])])])
|
|---|
| 471 |
|
|---|
| 472 | # b4_percent_define_check_values(VALUES)
|
|---|
| 473 | # --------------------------------------
|
|---|
| 474 | # Mimic muscle_percent_define_check_values in ../src/muscle_tab.h exactly
|
|---|
| 475 | # except that the VALUES structure is more appropriate for M4. That is, VALUES
|
|---|
| 476 | # is a list of sublists of strings. For each sublist, the first string is the
|
|---|
| 477 | # name of a %define variable, and all remaining strings in that sublist are the
|
|---|
| 478 | # valid values for that variable. Complain if such a variable is undefined (a
|
|---|
| 479 | # Bison error since the default value should have been set already) or defined
|
|---|
| 480 | # to any other value (possibly a user error). Don't record this as a Bison
|
|---|
| 481 | # usage of the variable as there's no reason to suspect that the value has yet
|
|---|
| 482 | # influenced the output.
|
|---|
| 483 | #
|
|---|
| 484 | # For example:
|
|---|
| 485 | #
|
|---|
| 486 | # b4_percent_define_check_values([[[[foo]], [[foo-value1]], [[foo-value2]]]],
|
|---|
| 487 | # [[[[bar]], [[bar-value1]]]])
|
|---|
| 488 | m4_define([b4_percent_define_check_values],
|
|---|
| 489 | [m4_foreach([b4_sublist], m4_quote($@),
|
|---|
| 490 | [_b4_percent_define_check_values(b4_sublist)])])
|
|---|
| 491 |
|
|---|
| 492 | m4_define([_b4_percent_define_check_values],
|
|---|
| 493 | [m4_ifdef([b4_percent_define(]$1[)],
|
|---|
| 494 | [m4_pushdef([b4_good_value], [0])dnl
|
|---|
| 495 | m4_if($#, 1, [],
|
|---|
| 496 | [m4_foreach([b4_value], m4_dquote(m4_shift($@)),
|
|---|
| 497 | [m4_if(m4_indir([b4_percent_define(]$1[)]), b4_value,
|
|---|
| 498 | [m4_define([b4_good_value], [1])])])])dnl
|
|---|
| 499 | m4_if(b4_good_value, [0],
|
|---|
| 500 | [b4_complain_at(b4_percent_define_get_loc([$1]),
|
|---|
| 501 | [[invalid value for %%define variable `%s': `%s']],
|
|---|
| 502 | [$1],
|
|---|
| 503 | m4_dquote(m4_indir([b4_percent_define(]$1[)])))])dnl
|
|---|
| 504 | m4_popdef([b4_good_value])],
|
|---|
| 505 | [b4_fatal([[undefined %%define variable `%s' passed to b4_percent_define_check_values]], [$1])])])
|
|---|
| 506 |
|
|---|
| 507 | # b4_percent_code_get([QUALIFIER])
|
|---|
| 508 | # --------------------------------
|
|---|
| 509 | # If any %code blocks for QUALIFIER are defined, emit them beginning with a
|
|---|
| 510 | # comment and ending with synclines and a newline. If QUALIFIER is not
|
|---|
| 511 | # specified or empty, do this for the unqualified %code blocks. Also, record
|
|---|
| 512 | # Bison's usage of QUALIFIER (if specified) by defining
|
|---|
| 513 | # b4_percent_code_bison_qualifiers(QUALIFIER).
|
|---|
| 514 | #
|
|---|
| 515 | # For example, to emit any unqualified %code blocks followed by any %code
|
|---|
| 516 | # blocks for the qualifier foo:
|
|---|
| 517 | #
|
|---|
| 518 | # b4_percent_code_get
|
|---|
| 519 | # b4_percent_code_get([[foo]])
|
|---|
| 520 | m4_define([b4_percent_code_get],
|
|---|
| 521 | [m4_pushdef([b4_macro_name], [[b4_percent_code(]$1[)]])dnl
|
|---|
| 522 | m4_ifval([$1], [m4_define([b4_percent_code_bison_qualifiers(]$1[)])])dnl
|
|---|
| 523 | m4_ifdef(b4_macro_name,
|
|---|
| 524 | [b4_comment([m4_if([$#], [0], [[Unqualified %code]],
|
|---|
| 525 | [["%code ]$1["]])[ blocks.]])
|
|---|
| 526 | b4_user_code([m4_indir(b4_macro_name)])
|
|---|
| 527 | ])dnl
|
|---|
| 528 | m4_popdef([b4_macro_name])])
|
|---|
| 529 |
|
|---|
| 530 | # b4_percent_code_ifdef(QUALIFIER, IF-TRUE, [IF-FALSE])
|
|---|
| 531 | # -----------------------------------------------------
|
|---|
| 532 | # If any %code blocks for QUALIFIER (or unqualified %code blocks if
|
|---|
| 533 | # QUALIFIER is empty) are defined, expand IF-TRUE, else expand IF-FALSE.
|
|---|
| 534 | # Also, record Bison's usage of QUALIFIER (if specified) by defining
|
|---|
| 535 | # b4_percent_code_bison_qualifiers(QUALIFIER).
|
|---|
| 536 | m4_define([b4_percent_code_ifdef],
|
|---|
| 537 | [m4_ifdef([b4_percent_code(]$1[)],
|
|---|
| 538 | [m4_ifval([$1], [m4_define([b4_percent_code_bison_qualifiers(]$1[)])])$2],
|
|---|
| 539 | [$3])])
|
|---|
| 540 |
|
|---|
| 541 |
|
|---|
| 542 | ## ----------------------------------------------------------- ##
|
|---|
| 543 | ## After processing the skeletons, check that all the user's ##
|
|---|
| 544 | ## %define variables and %code qualifiers were used by Bison. ##
|
|---|
| 545 | ## ----------------------------------------------------------- ##
|
|---|
| 546 |
|
|---|
| 547 | m4_define([b4_check_user_names_wrap],
|
|---|
| 548 | [m4_ifdef([b4_percent_]$1[_user_]$2[s],
|
|---|
| 549 | [b4_check_user_names([[%]$1 $2],
|
|---|
| 550 | [b4_percent_]$1[_user_]$2[s],
|
|---|
| 551 | [[b4_percent_]$1[_bison_]$2[s]])])])
|
|---|
| 552 |
|
|---|
| 553 | m4_wrap_lifo([
|
|---|
| 554 | b4_check_user_names_wrap([[define]], [[variable]])
|
|---|
| 555 | b4_check_user_names_wrap([[code]], [[qualifier]])
|
|---|
| 556 | ])
|
|---|
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