-*- Autoconf -*-
# Language-independent M4 Macros for Bison.
-# Copyright (C) 2002, 2004, 2005, 2006, 2007, 2008, 2009 Free Software
-# Foundation, Inc.
+
+# Copyright (C) 2002, 2004-2012 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
version 2.2 of Bison.])])
+## -------- ##
+## Output. ##
+## -------- ##
+
+# b4_output_begin(FILE)
+# ---------------------
+# Enable output, i.e., send to diversion 0, expand after "#", and
+# generate the tag to output into FILE. Must be followed by EOL.
+m4_define([b4_output_begin],
+[m4_changecom()
+m4_divert_push(0)dnl
+@output(m4_unquote([$1])@)@dnl
+])
+
+
+# b4_output_end()
+# ---------------
+# Output nothing, restore # as comment character (no expansions after #).
+m4_define([b4_output_end],
+[m4_divert_pop(0)
+m4_changecom([#])
+])
+
+
## ---------------- ##
## Error handling. ##
## ---------------- ##
#
# For example:
#
-# b4_error([[warn]], [[invalid value for `%s': %s]], [[foo]], [[3]])
+# b4_error([[warn]], [[invalid value for '%s': %s]], [[foo]], [[3]])
m4_define([b4_error],
[b4_cat([[@]$1[(]$2[]]dnl
[m4_if([$#], [2], [],
#
# For example:
#
-# b4_warn([[invalid value for `%s': %s]], [[foo]], [[3]])
+# b4_warn([[invalid value for '%s': %s]], [[foo]], [[3]])
#
# As a simple test suite, this:
#
m4_exit(1)])
-## ---------------- ##
-## Default values. ##
-## ---------------- ##
-
-# m4_define_default([b4_lex_param], []) dnl breaks other skeletons
-m4_define_default([b4_pre_prologue], [])
-m4_define_default([b4_post_prologue], [])
-m4_define_default([b4_epilogue], [])
-m4_define_default([b4_parse_param], [])
-
-# The initial column and line.
-m4_define_default([b4_location_initial_column], [1])
-m4_define_default([b4_location_initial_line], [1])
-
-
## ------------ ##
## Data Types. ##
## ------------ ##
# _b4_define_flag_if($1, $2, FLAG)
# --------------------------------
-# This macro works around the impossibility to define macros
-# inside macros, because issuing `[$1]' is not possible in M4 :(.
-# This sucks hard, GNU M4 should really provide M5 like $$1.
+# Work around the impossibility to define macros inside macros,
+# because issuing `[$1]' is not possible in M4. GNU M4 should provide
+# $$1 a la M5/TeX.
m4_define([_b4_define_flag_if],
[m4_if([$1$2], $[1]$[2], [],
[m4_fatal([$0: Invalid arguments: $@])])dnl
# b4_FLAG_if(IF-TRUE, IF-FALSE)
# -----------------------------
# Expand IF-TRUE, if FLAG is true, IF-FALSE otherwise.
-b4_define_flag_if([defines]) # Whether headers are requested.
-b4_define_flag_if([error_verbose]) # Whether error are verbose.
-b4_define_flag_if([glr]) # Whether a GLR parser is requested.
-b4_define_flag_if([locations]) # Whether locations are tracked.
-b4_define_flag_if([nondeterministic]) # Whether conflicts should be handled.
-b4_define_flag_if([yacc]) # Whether POSIX Yacc is emulated.
+b4_define_flag_if([defines]) # Whether headers are requested.
+b4_define_flag_if([error_verbose]) # Whether error are verbose.
+b4_define_flag_if([glr]) # Whether a GLR parser is requested.
+b4_define_flag_if([locations]) # Whether locations are tracked.
+b4_define_flag_if([nondeterministic]) # Whether conflicts should be handled.
+b4_define_flag_if([token_table]) # Whether yytoken_table is demanded.
+b4_define_flag_if([yacc]) # Whether POSIX Yacc is emulated.
+# yytoken_table is needed to support verbose errors.
+b4_error_verbose_if([m4_define([b4_token_table_flag], [1])])
-## ------------------------- ##
-## Assigning token numbers. ##
-## ------------------------- ##
## ----------- ##
# b4_syncline(LINE, FILE)
# -----------------------
m4_define([b4_syncline],
-[b4_flag_if([synclines], [
-b4_sync_end([__line__], [b4_basename(m4_quote(__file__))])
+[b4_flag_if([synclines],
+[b4_sync_end([__line__], [b4_basename(m4_quote(__file__))])
b4_sync_start([$1], [$2])])])
m4_define([b4_sync_end], [b4_comment([Line $1 of $2])])
# b4_check_user_names(WHAT, USER-LIST, BISON-NAMESPACE)
-# --------------------------------------------------------
-# Warn if any name of type WHAT is used by the user (as recorded in USER-LIST)
-# but is not used by Bison (as recorded by macros in the namespace
-# BISON-NAMESPACE).
+# -----------------------------------------------------
+# Complain if any name of type WHAT is used by the user (as recorded in
+# USER-LIST) but is not used by Bison (as recorded by macros in the
+# namespace BISON-NAMESPACE).
#
-# USER-LIST must expand to a list specifying all grammar occurrences of all
-# names of type WHAT. Each item in the list must be a triplet specifying one
+# USER-LIST must expand to a list specifying all user occurrences of all names
+# of type WHAT. Each item in the list must be a triplet specifying one
# occurrence: name, start boundary, and end boundary. Empty string names are
# fine. An empty list is fine.
#
m4_pushdef([b4_start], m4_car(m4_shift(b4_occurrence)))dnl
m4_pushdef([b4_end], m4_shift(m4_shift(b4_occurrence)))dnl
m4_ifndef($3[(]m4_quote(b4_user_name)[)],
- [b4_warn_at([b4_start], [b4_end],
- [[%s `%s' is not used]],
- [$1], [b4_user_name])])[]dnl
+ [b4_complain_at([b4_start], [b4_end],
+ [[%s '%s' is not used]],
+ [$1], [b4_user_name])])[]dnl
m4_popdef([b4_occurrence])dnl
m4_popdef([b4_user_name])dnl
m4_popdef([b4_start])dnl
m4_popdef([b4_end])dnl
])])
-# b4_percent_define_get(VARIABLE)
+
+
+
+## --------------------- ##
+## b4_percent_define_*. ##
+## --------------------- ##
+
+
+# b4_percent_define_use(VARIABLE)
# -------------------------------
-# Mimic muscle_percent_define_get in ../src/muscle_tab.h exactly. That is, if
-# the %define variable VARIABLE is defined, emit its value. Also, record
+# Declare that VARIABLE was used.
+m4_define([b4_percent_define_use],
+[m4_define([b4_percent_define_bison_variables(]$1[)])dnl
+])
+
+# b4_percent_define_get(VARIABLE, [DEFAULT])
+# ------------------------------------------
+# Mimic muscle_percent_define_get in ../src/muscle-tab.h. That is, if
+# the %define variable VARIABLE is defined, emit its value. Contrary
+# to its C counterpart, return DEFAULT otherwise. Also, record
# Bison's usage of VARIABLE by defining
# b4_percent_define_bison_variables(VARIABLE).
#
#
# b4_percent_define_get([[foo]])
m4_define([b4_percent_define_get],
-[m4_define([b4_percent_define_bison_variables(]$1[)])dnl
-m4_ifdef([b4_percent_define(]$1[)], [m4_indir([b4_percent_define(]$1[)])])])
+[b4_percent_define_use([$1])dnl
+m4_ifdef([b4_percent_define(]$1[)],
+ [m4_indir([b4_percent_define(]$1[)])],
+ [$2])])
+
# b4_percent_define_get_loc(VARIABLE)
# -----------------------------------
-# Mimic muscle_percent_define_get_loc in ../src/muscle_tab.h exactly. That is,
+# Mimic muscle_percent_define_get_loc in ../src/muscle-tab.h exactly. That is,
# if the %define variable VARIABLE is undefined, complain fatally since that's
# a Bison or skeleton error. Otherwise, return its definition location in a
# form approriate for the first two arguments of b4_warn_at, b4_complain_at, or
[m4_pushdef([b4_loc], m4_indir([b4_percent_define_loc(]$1[)]))dnl
b4_loc[]dnl
m4_popdef([b4_loc])],
- [b4_fatal([[undefined %%define variable `%s' passed to b4_percent_define_get_loc]], [$1])])])
+ [b4_fatal([[b4_percent_define_get_loc: undefined %%define variable '%s']], [$1])])])
# b4_percent_define_get_syncline(VARIABLE)
# ----------------------------------------
-# Mimic muscle_percent_define_get_syncline in ../src/muscle_tab.h exactly.
+# Mimic muscle_percent_define_get_syncline in ../src/muscle-tab.h exactly.
# That is, if the %define variable VARIABLE is undefined, complain fatally
# since that's a Bison or skeleton error. Otherwise, return its definition
# location as a b4_syncline invocation. Don't record this as a Bison usage of
m4_define([b4_percent_define_get_syncline],
[m4_ifdef([b4_percent_define_syncline(]$1[)],
[m4_indir([b4_percent_define_syncline(]$1[)])],
- [b4_fatal([[undefined %%define variable `%s' passed to b4_percent_define_get_syncline]], [$1])])])
+ [b4_fatal([[b4_percent_define_get_syncline: undefined %%define variable '%s']], [$1])])])
# b4_percent_define_ifdef(VARIABLE, IF-TRUE, [IF-FALSE])
# ------------------------------------------------------
-# Mimic muscle_percent_define_ifdef in ../src/muscle_tab.h exactly. That is,
+# Mimic muscle_percent_define_ifdef in ../src/muscle-tab.h exactly. That is,
# if the %define variable VARIABLE is defined, expand IF-TRUE, else expand
# IF-FALSE. Also, record Bison's usage of VARIABLE by defining
# b4_percent_define_bison_variables(VARIABLE).
# b4_percent_define_flag_if(VARIABLE, IF-TRUE, [IF-FALSE])
# --------------------------------------------------------
-# Mimic muscle_percent_define_flag_if in ../src/muscle_tab.h exactly. That is,
+# Mimic muscle_percent_define_flag_if in ../src/muscle-tab.h exactly. That is,
# if the %define variable VARIABLE is defined to "" or "true", expand IF-TRUE.
# If it is defined to "false", expand IF-FALSE. Complain if it is undefined
# (a Bison or skeleton error since the default value should have been set
[m4_case(b4_percent_define_get([$1]),
[], [$2], [true], [$2], [false], [$3],
[m4_expand_once([b4_complain_at(b4_percent_define_get_loc([$1]),
- [[invalid value for %%define Boolean variable `%s']],
+ [[invalid value for %%define Boolean variable '%s']],
[$1])],
[[b4_percent_define_flag_if($1)]])])],
- [b4_fatal([[undefined %%define variable `%s' passed to b4_percent_define_flag_if]], [$1])])])
+ [b4_fatal([[b4_percent_define_flag_if: undefined %%define variable '%s']], [$1])])])
# b4_percent_define_default(VARIABLE, DEFAULT)
# --------------------------------------------
-# Mimic muscle_percent_define_default in ../src/muscle_tab.h exactly. That is,
+# Mimic muscle_percent_define_default in ../src/muscle-tab.h exactly. That is,
# if the %define variable VARIABLE is undefined, set its value to DEFAULT.
# Don't record this as a Bison usage of VARIABLE as there's no reason to
# suspect that the value has yet influenced the output.
# b4_percent_define_check_values(VALUES)
# --------------------------------------
-# Mimic muscle_percent_define_check_values in ../src/muscle_tab.h exactly
+# Mimic muscle_percent_define_check_values in ../src/muscle-tab.h exactly
# except that the VALUES structure is more appropriate for M4. That is, VALUES
# is a list of sublists of strings. For each sublist, the first string is the
# name of a %define variable, and all remaining strings in that sublist are the
[m4_define([b4_good_value], [1])])])])dnl
m4_if(b4_good_value, [0],
[b4_complain_at(b4_percent_define_get_loc([$1]),
- [[invalid value for %%define variable `%s': `%s']],
+ [[invalid value for %%define variable '%s': '%s']],
[$1],
- m4_dquote(m4_indir([b4_percent_define(]$1[)])))])dnl
+ m4_dquote(m4_indir([b4_percent_define(]$1[)])))
+ m4_foreach([b4_value], m4_dquote(m4_shift($@)),
+ [b4_complain_at(b4_percent_define_get_loc([$1]),
+ [[accepted value: '%s']],
+ m4_dquote(b4_value))])])dnl
m4_popdef([b4_good_value])],
- [b4_fatal([[undefined %%define variable `%s' passed to b4_percent_define_check_values]], [$1])])])
+ [b4_fatal([[b4_percent_define_check_values: undefined %%define variable '%s']], [$1])])])
# b4_percent_code_get([QUALIFIER])
# --------------------------------
b4_check_user_names_wrap([[define]], [[variable]])
b4_check_user_names_wrap([[code]], [[qualifier]])
])
+
+
+## ---------------- ##
+## Default values. ##
+## ---------------- ##
+
+# m4_define_default([b4_lex_param], []) dnl breaks other skeletons
+m4_define_default([b4_pre_prologue], [])
+m4_define_default([b4_post_prologue], [])
+m4_define_default([b4_epilogue], [])
+m4_define_default([b4_parse_param], [])
+
+# The initial column and line.
+m4_define_default([b4_location_initial_column], [1])
+m4_define_default([b4_location_initial_line], [1])
+
+# Sanity checks.
+b4_percent_define_ifdef([api.prefix],
+[m4_ifdef([b4_prefix],
+[b4_complain_at(b4_percent_define_get_loc([api.prefix]),
+ [['%s' and '%s' cannot be used together]],
+ [%name-prefix],
+ [%define api.prefix])])])
projects / bison.git / blobdiff