# Language-independent M4 Macros for Bison.
# Copyright (C) 2002, 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
-# This program is free software; you can redistribute it and/or modify
+# 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 of the License, or
+# the Free Software Foundation, either version 3 of the License, 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
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
## ---------------- ##
m4_text_wrap([Copyright (C) $2 Free Software Foundation, Inc.], [ ])
-This program is free software; you can redistribute it and/or modify
+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.
+the Free Software Foundation, either version 3 of the License, 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
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.])
+along with this program. If not, see <http://www.gnu.org/licenses/>.])
b4_comment([As a special exception, you may create a larger work that contains
part or all of the Bison parser skeleton and distribute that work
b4_define_user_code([stype])
-# b4_check_user_names(WHAT, USER-LIST, SKELETON-LIST)
-# ---------------------------------------------------
+# 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 the skeleton (as recorded in SKELETON-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 is a triplet specifying one
+# 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_user_foo_names to be used for USER-LIST with three
+# 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_user_foo_names],
+# 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]]]]]])
#
-# SKELETON-LIST must expand to a list specifying all names of type WHAT that
-# are used by the skeleton. Multiple occurrences of the same name are fine.
-# Empty string names are fine, but it would be ugly for a Bison skeleton to
-# actually use one. An empty list is fine.
+# 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 define b4_skeleton_foo_names to be used for SKELETON-LIST
-# with two names and with correct quoting:
+# 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_skeleton_foo_names],
-# [[[[bar]], [[baz]]]])
+# 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_user_foo_names, with SKELETON-LIST b4_skeleton_foo_names, and with correct
+# b4_foo_user_names, with BISON-NAMESPACE b4_foo_bison_names, and with correct
# quoting:
#
-# b4_check_user_names([[foo]], [b4_user_foo_names], [b4_skeleton_foo_names])
+# 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_pushdef([b4_found], [[0]])dnl
-m4_foreach([b4_skeleton_name], $3,
- [m4_if(m4_quote(b4_user_name),
- m4_quote(b4_skeleton_name),
- [m4_define([b4_found], [[1]])])])dnl
-m4_if(b4_found, [0], [b4_warn_at([b4_start], [b4_end],
- [[%s `%s' is not used]],
- [$1], [b4_user_name])])[]dnl
-m4_popdef([b4_found])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
m4_popdef([b4_occurrence])dnl
m4_popdef([b4_user_name])dnl
m4_popdef([b4_start])dnl
m4_popdef([b4_end])dnl
])])
-# b4_get_percent_define(VARIABLE)
-# --------------------------------
-# If the %define variable VARIABLE is defined, emit it. Also, record VARIABLE
-# in b4_skeleton_percent_define_variables.
-m4_define([b4_get_percent_define],
-[m4_append([b4_skeleton_percent_define_variables], [[$1]], [[, ]])dnl
-m4_ifdef([b4_percent_define_]$1, [b4_percent_define_]$1)])
-
-# b4_get_percent_code([QUALIFIER])
+# b4_percent_define_get(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
+# 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],
+[m4_define([b4_percent_define_bison_variables(]$1[)])dnl
+m4_ifdef([b4_percent_define(]$1[)], [m4_indir([b4_percent_define(]$1[)])])])
+
+# 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],
+[m4_ifdef([b4_percent_define(]$1[)],
+ [m4_define([b4_percent_define_bison_variables(]$1[)])$2],
+ [$3])])
+
+# 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([dnl
+ m4_pushdef([b4_loc], m4_indir([b4_percent_define_loc(]$1[)]))dnl
+ b4_complain_at(b4_loc,
+ [[invalid value for %%define Boolean variable `%s']],
+ [$1])dnl
+ m4_popdef([b4_loc])],
+ [[b4_percent_define_flag_if($1)]])])],
+ [b4_fatal([[undefined %%define variable `%s' passed to b4_percent_define_flag_if]], [$1])])])
+
+# b4_percent_define_default(VARIABLE, DEFAULT)
+# --------------------------------------------
+# 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],
+[m4_ifndef([b4_percent_define(]$1[)],
+ [m4_define([b4_percent_define(]$1[)], [$2])dnl
+ m4_define([b4_percent_define_loc(]$1[)],
+ [[[[[Bison:b4_percent_define_default]:0.0]], [[[Bison:b4_percent_define_default]:0.0]]]])])])
+
+# b4_percent_code_get([QUALIFIER])
# --------------------------------
# If any %code blocks for QUALIFIER are defined, emit them beginning with a
# comment and ending with synclines and a newline. If QUALIFIER is not
-# specified (thus, b4_get_percent_code is invoked without parens), do this for
-# the unqualified %code blocks. Also, record QUALIFIER (if specified) in
-# b4_skeleton_percent_code_qualifiers.
-m4_define([b4_get_percent_code],
-[m4_pushdef([b4_macro_name], [[b4_percent_code]]m4_if([$#], [1], [[[_]$1]]))dnl
-m4_if([$#], [1],
- [m4_append([b4_skeleton_percent_code_qualifiers], [[$1]], [[, ]])])dnl
+# 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]],
[[%code "]$1["]])[ blocks.]])
-b4_user_code(b4_macro_name)])dnl
+b4_user_code([m4_indir(b4_macro_name)])
+])dnl
m4_popdef([b4_macro_name])])
-
-## --------------------------------------------------------- ##
-## After processing the skeletons, check that all the user's ##
-## %define variables and %code qualifiers were used. ##
-## --------------------------------------------------------- ##
+# 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])])
+
+
+## ----------------------------------------------------------- ##
+## 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([
-m4_pushdef([b4_check_user_names_wrap],
-[m4_ifdef([b4_skeleton_percent_$1],
- [m4_define([b4_skeleton_percent_$1],
- m4_dquote(m4_dquote(b4_skeleton_percent_$1)))],
- [m4_define([b4_skeleton_percent_$1], [[]])])
-
-m4_ifdef([b4_user_percent_$1],
- [b4_check_user_names([$2],
- [b4_user_percent_$1],
- [b4_skeleton_percent_$1])])
-])
-
-b4_check_user_names_wrap([define_variables], [[%define variable]])
-b4_check_user_names_wrap([code_qualifiers], [[%code qualifier]])
-
-m4_popdef([b4_check_user_names_wrap])
+b4_check_user_names_wrap([[define]], [[variable]])
+b4_check_user_names_wrap([[code]], [[qualifier]])
])
projects / bison.git / blobdiff