Use bison instead of bison++

The += operator should also take the environment variables into account
Solved problem when & in redirect operator on command line
Solved syntax error when SPACE was follewed by SPACE
Removed kdevelop3 project files
Enable debug info in debug build on linux
Added support for foreach function
Fixed dependency problem for implicit rules with extra dependencies
Increased gnu make compatibility: allow implicit rules without commands
Solved wrong error message when it cannot build a target in mhmake_dbg
On windows: when checking the extension of a command: make sure a / does not cause a wrong decision
Added safety against recursive implicit rules.
Fixed wrong check on failure to open makefiles.
Make sure no message is printed when -include is used
flex and bison generated files: make sure the #line statements have the correct line numbers for the debugger after having added one line in the beginning of the file after running the flex/bison.
Make sure that the variable defined just before an error or message/info macro is defined when the message is generated.
mhmake_dbg: print error message when a target cannot be build because the directory of the target does not exist (and no rule is defined for it)
Reformatted message/info macro output
Also print makefile and line number when using error and message macro
Solved crash in mhmake_dbg when -C is specified on the command line
Solved problem in macro expansion when 2 patsubst inside each other
addprefix should not give an error when done on an empty string
Use comspec when echo is followed by a pipe character (piping is not supported by the echo internal command of mhmake)
Solved possible stack curruption (there was little chance that this was occuring)

1 files changed, 556 insertions, 0 deletions

diff --git a/tools/mhmake/src/bisondata/bison.m4 b/tools/mhmake/src/bisondata/bison.m4
new file mode 100644
index 000000000..af7c8f7a7
--- /dev/null
+++ b/tools/mhmake/src/bisondata/bison.m4
@@ -0,0 +1,556 @@
+                                                            -*- Autoconf -*-

+

+# Language-independent M4 Macros for Bison.

+# Copyright (C) 2002, 2004, 2005, 2006, 2007, 2008 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 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, see <http://www.gnu.org/licenses/>.

+

+

+## ---------------- ##

+## Identification.  ##

+## ---------------- ##

+

+# b4_copyright(TITLE, YEARS)

+# --------------------------

+m4_define([b4_copyright],

+[b4_comment([A Bison parser, made by GNU Bison b4_version.])

+

+b4_comment([$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 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, 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

+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.])])

+

+

+## ---------------- ##

+## Error handling.  ##

+## ---------------- ##

+

+# The following error handling macros print error directives that should not

+# become arguments of other macro invocations since they would likely then be

+# mangled.  Thus, they print to stdout directly.

+

+# b4_cat(TEXT)

+# ------------

+# Write TEXT to stdout.  Precede the final newline with an @ so that it's

+# escaped.  For example:

+#

+#   b4_cat([[@complain(invalid input@)]])

+m4_define([b4_cat],

+[m4_syscmd([cat <<'_m4eof'

+]m4_bpatsubst(m4_dquote($1), [_m4eof], [_m4@`eof])[@

+_m4eof

+])dnl

+m4_if(m4_sysval, [0], [], [m4_fatal([$0: cannot write to stdout])])])

+

+# b4_error(KIND, FORMAT, [ARG1], [ARG2], ...)

+# -------------------------------------------

+# Write @KIND(FORMAT@,ARG1@,ARG2@,...@) to stdout.

+#

+# For example:

+#

+#   b4_error([[warn]], [[invalid value for `%s': %s]], [[foo]], [[3]])

+m4_define([b4_error],

+[b4_cat([[@]$1[(]$2[]]dnl

+[m4_if([$#], [2], [],

+       [m4_foreach([b4_arg],

+                   m4_dquote(m4_shift(m4_shift($@))),

+                   [[@,]b4_arg])])[@)]])])

+

+# b4_error_at(KIND, START, END, FORMAT, [ARG1], [ARG2], ...)

+# ----------------------------------------------------------

+# Write @KIND_at(START@,END@,FORMAT@,ARG1@,ARG2@,...@) to stdout.

+#

+# For example:

+#

+#   b4_error_at([[complain]], [[input.y:2.3]], [[input.y:5.4]],

+#               [[invalid %s]], [[foo]])

+m4_define([b4_error_at],

+[b4_cat([[@]$1[_at(]$2[@,]$3[@,]$4[]]dnl

+[m4_if([$#], [4], [],

+       [m4_foreach([b4_arg],

+                   m4_dquote(m4_shift(m4_shift(m4_shift(m4_shift($@))))),

+                   [[@,]b4_arg])])[@)]])])

+

+# b4_warn(FORMAT, [ARG1], [ARG2], ...)

+# ------------------------------------

+# Write @warn(FORMAT@,ARG1@,ARG2@,...@) to stdout.

+#

+# For example:

+#

+#   b4_warn([[invalid value for `%s': %s]], [[foo]], [[3]])

+#

+# As a simple test suite, this:

+#

+#   m4_divert(-1)

+#   m4_define([asdf], [ASDF])

+#   m4_define([fsa], [FSA])

+#   m4_define([fdsa], [FDSA])

+#   b4_warn([[[asdf), asdf]]], [[[fsa), fsa]]], [[[fdsa), fdsa]]])

+#   b4_warn([[asdf), asdf]], [[fsa), fsa]], [[fdsa), fdsa]])

+#   b4_warn()

+#   b4_warn(1)

+#   b4_warn(1, 2)

+#

+# Should produce this without newlines:

+#

+#   @warn([asdf), asdf]@,[fsa), fsa]@,[fdsa), fdsa]@)

+#   @warn(asdf), asdf@,fsa), fsa@,fdsa), fdsa@)

+#   @warn(@)

+#   @warn(1@)

+#   @warn(1@,2@)

+m4_define([b4_warn],

+[b4_error([[warn]], $@)])

+

+# b4_warn_at(START, END, FORMAT, [ARG1], [ARG2], ...)

+# ---------------------------------------------------

+# Write @warn(START@,END@,FORMAT@,ARG1@,ARG2@,...@) to stdout.

+#

+# For example:

+#

+#   b4_warn_at([[input.y:2.3]], [[input.y:5.4]], [[invalid %s]], [[foo]])

+m4_define([b4_warn_at],

+[b4_error_at([[warn]], $@)])

+

+# b4_complain(FORMAT, [ARG1], [ARG2], ...)

+# ----------------------------------------

+# Write @complain(FORMAT@,ARG1@,ARG2@,...@) to stdout.

+#

+# See b4_warn example.

+m4_define([b4_complain],

+[b4_error([[complain]], $@)])

+

+# b4_complain_at(START, END, FORMAT, [ARG1], [ARG2], ...)

+# -------------------------------------------------------

+# Write @complain(START@,END@,FORMAT@,ARG1@,ARG2@,...@) to stdout.

+#

+# See b4_warn_at example.

+m4_define([b4_complain_at],

+[b4_error_at([[complain]], $@)])

+

+# b4_fatal(FORMAT, [ARG1], [ARG2], ...)

+# -------------------------------------

+# Write @fatal(FORMAT@,ARG1@,ARG2@,...@) to stdout and exit.

+#

+# See b4_warn example.

+m4_define([b4_fatal],

+[b4_error([[fatal]], $@)dnl

+m4_exit(1)])

+

+# b4_fatal_at(START, END, FORMAT, [ARG1], [ARG2], ...)

+# ----------------------------------------------------

+# Write @fatal(START@,END@,FORMAT@,ARG1@,ARG2@,...@) to stdout and exit.

+#

+# See b4_warn_at example.

+m4_define([b4_fatal_at],

+[b4_error_at([[fatal]], $@)dnl

+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_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])])

+

+

+

+## ------------------ ##

+## 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([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.

+

+

+## ------------------------- ##

+## Assigning token numbers.  ##

+## ------------------------- ##

+

+

+## ----------- ##

+## 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)

+# -----------------------

+m4_define([b4_syncline],

+[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])])

+m4_define([b4_sync_start], [b4_comment([Line $1 of $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_pre_prologue

+# 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([pre_prologue])

+b4_define_user_code([stype])

+

+

+# 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).

+#

+# 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

+# 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_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_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_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 approriate 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([[undefined %%define variable `%s' passed to b4_percent_define_get_loc]], [$1])])])

+

+# b4_percent_define_get_syncline(VARIABLE)

+# ----------------------------------------

+# 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([[undefined %%define variable `%s' passed to b4_percent_define_get_syncline]], [$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([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([[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]:1.0]], [[[Bison:b4_percent_define_default]:1.0]]]])dnl

+            m4_define([b4_percent_define_syncline(]$1[)],

+                      [[]b4_syncline(1, [["[Bison:b4_percent_define_default]"]])[

+]])])])

+

+# 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],

+[m4_ifdef([b4_percent_define(]$1[)],

+  [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[)])))])dnl

+   m4_popdef([b4_good_value])],

+  [b4_fatal([[undefined %%define variable `%s' passed to b4_percent_define_check_values]], [$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]],

+                   [["%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])])

+

+

+## ----------------------------------------------------------- ##

+## 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]])

+])