# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
# 02110-1301 USA
-
## ---------------- ##
## Identification. ##
## ---------------- ##
-# b4_copyright(TITLE, YEARS)
-# --------------------------
-m4_define([b4_copyright],
-[/* A Bison parser, made by GNU Bison b4_version. */
-
-/* $1
-
-m4_text_wrap([Copyright (C) $2 Free Software Foundation, Inc.], [ ])
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2, or (at your option)
- any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 51 Franklin Street, Fifth Floor,
- Boston, MA 02110-1301, USA. */
-
-/* As a special exception, you may create a larger work that contains
- part or all of the Bison parser skeleton and distribute that work
- under terms of your choice, so long as that work isn't itself a
- parser generator using the skeleton or a modified version thereof
- as a parser skeleton. Alternatively, if you modify or redistribute
- the parser skeleton itself, you may (at your option) remove this
- special exception, which will cause the skeleton and the resulting
- Bison output files to be licensed under the GNU General Public
- License without this special exception.
-
- This special exception was added by the Free Software Foundation in
- version 2.2 of Bison. */])
-
+# b4_comment(TEXT)
+# ----------------
+m4_define([b4_comment], [/* m4_bpatsubst([$1], [
+], [
+ ]) */])
# b4_identification
# -----------------
/* Pure parsers. */
[#]define YYPURE b4_pure_flag
+/* Push parsers. */
+[#]define YYPUSH b4_push_flag
+
+/* Pull parsers. */
+[#]define YYPULL b4_pull_flag
+
/* Using locations. */
[#]define YYLSP_NEEDED b4_locations_flag
])
-
## ---------------- ##
## Default values. ##
## ---------------- ##
-m4_define_default([b4_epilogue], [])
-
# If the %union is not named, its name is YYSTYPE.
m4_define_default([b4_union_name], [YYSTYPE])
-# The initial column and line.
-m4_define_default([b4_location_initial_column], [1])
-m4_define_default([b4_location_initial_line], [1])
-
+# If the %name-prefix is not given, it is yy.
+m4_define_default([b4_prefix], [yy])
## ------------------------ ##
## Pure/impure interfaces. ##
## ------------------------ ##
-
# b4_user_args
# ------------
m4_define([b4_user_args],
# --------------
# If defined, b4_parse_param arrives double quoted, but below we prefer
# it to be single quoted.
-m4_define_default([b4_parse_param])
m4_define([b4_parse_param],
b4_parse_param))
])dnl
])
+
## ------------ ##
## Data Types. ##
## ------------ ##
-
-# b4_ints_in(INT1, INT2, LOW, HIGH)
-# ---------------------------------
-# Return 1 iff both INT1 and INT2 are in [LOW, HIGH], 0 otherwise.
-m4_define([b4_ints_in],
-[m4_eval([$3 <= $1 && $1 <= $4 && $3 <= $2 && $2 <= $4])])
-
-
# b4_int_type(MIN, MAX)
# ---------------------
# Return the smallest int type able to handle numbers ranging from
m4_define([b4_int_type_for],
[b4_int_type($1_min, $1_max)])
+## ---------##
+## Values. ##
+## ---------##
-## ------------------ ##
-## Decoding options. ##
-## ------------------ ##
-
-# b4_flag_if(FLAG, IF-TRUE, IF-FALSE)
-# -----------------------------------
-# Run IF-TRUE if b4_FLAG_flag is 1, IF-FALSE if FLAG is 0, otherwise fail.
-m4_define([b4_flag_if],
-[m4_case(b4_$1_flag,
- [0], [$3],
- [1], [$2],
- [m4_fatal([invalid $1 value: ]$1)])])
-
-
-# b4_define_flag_if(FLAG)
-# -----------------------
-# Define "b4_FLAG_if(IF-TRUE, IF-FALSE)" that depends on the
-# value of the Boolean FLAG.
-m4_define([b4_define_flag_if],
-[_b4_define_flag_if($[1], $[2], [$1])])
-
-# _b4_define_flag_if($1, $2, FLAG)
-# --------------------------------
-# This macro works around the impossibility to define macros
-# inside macros, because issuing `[$1]' is not possible in M4 :(.
-# This sucks hard, GNU M4 should really provide M5 like $$1.
-m4_define([_b4_define_flag_if],
-[m4_if([$1$2], $[1]$[2], [],
- [m4_fatal([$0: Invalid arguments: $@])])dnl
-m4_define([b4_$3_if],
- [b4_flag_if([$3], [$1], [$2])])])
-
-
-# b4_FLAG_if(IF-TRUE, IF-FALSE)
-# -----------------------------
-# Expand IF-TRUE, if FLAG is true, IF-FALSE otherwise.
-b4_define_flag_if([defines]) # Whether headers are requested.
-b4_define_flag_if([error_verbose]) # Whether error are verbose.
-b4_define_flag_if([locations]) # Whether locations are tracked.
-b4_define_flag_if([pure]) # Whether the interface is pure.
-b4_define_flag_if([yacc]) # Whether POSIX Yacc is emulated.
-
+# b4_null
+---------
+# Return a null pointer constant. NULL infringes on the user name
+# space in C, so use 0 rather than NULL.
+m4_define([b4_null], [0])
## ------------------------- ##
## 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)
+# b4_sync_start(LINE, FILE)
# -----------------------
-m4_define([b4_syncline],
-[b4_flag_if([synclines],
-[/* Line __line__ of b4_basename(m4_quote(__file__)). */
-[#]line $1 $2])])
-
-
-# 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)
-# --------------------------
-# From b4_MACRO, build b4_user_MACRO that includes the synclines.
-m4_define([b4_define_user_code],
-[m4_define([b4_user_$1],
-[b4_user_code([b4_$1])])])
-
-
-# b4_user_actions
-# b4_user_initial_action
-# b4_user_post_prologue
-# b4_user_start_header
-# b4_user_stype
-# ----------------------
-# Macros that issue user code, ending with synclines.
-b4_define_user_code([actions])
-b4_define_user_code([initial_action])
-b4_define_user_code([post_prologue])
-b4_define_user_code([start_header])
-b4_define_user_code([stype])
+m4_define([b4_sync_start], [[#]line $1 $2])
## -------------- ##
## User actions. ##
## -------------- ##
+# b4_case(LABEL, STATEMENTS)
+# --------------------------
+m4_define([b4_case],
+[ case $1:
+$2
+ break;])
+
# b4_symbol_actions(FILENAME, LINENO,
# SYMBOL-TAG, SYMBOL-NUM,
# SYMBOL-ACTION, SYMBOL-TYPENAME)
projects / bison.git / blobdiff