Clean up %define and %code implementation in M4 some. Most

importantly, rename all related macros to be in the b4_percent_define and b4_percent_code namespaces. Also, complete support for `.' in %define variable names and %code qualifiers. * data/bison.m4 (b4_check_user_names): Check for special "SKELETON-NAMESPACE(name)" macros instead of using two nested m4_foreach loops. (b4_get_percent_define, b4_get_percent_code): Rename to... (b4_percent_define_get, b4_percent_code_get): ... these. Extend documentation with examples. For SKELETON-NAMESPACE (as documented for b4_check_user_names), use b4_percent_define_skeleton_variables and b4_percent_code_skeleton_qualifiers. Expect any value for the %define variable `foo' to be stored in the macro named `b4_percent_define(foo)'; expect any %code blocks for the qualifier `foo' to be stored in a macro named `b4_percent_code(foo)'; expect any unqualified %code blocks to be stored in a macro named `b4_percent_code_unqualified'. Use m4_indir so that %define variable names and %code qualifiers can contain `.', which is allowed by the grammar parser. (b4_percent_define_default): New macro to set a default value for a %define variable. (m4_wrap): Update wrapped code, and fix some underquoting. (b4_check_user_names_wrap): Update and define outside the m4_wrap. Expect grammar uses of %define variables and %code qualifiers to be defined in b4_percent_define_user_variables and b4_percent_code_user_qualifiers. * data/c++.m4: Use b4_percent_define_default rather than m4_define_default. Fix some underquoting. Skeleton usage of %define variable define_location_comparison now implies skeleton usage of %define variable filename_type. * data/glr.c, data/glr.cc, data/lalr1.cc, data/location.cc, data/push.c, data/yacc.c: Update macro names. * src/parse-gram.y (prologue_declaration, grammar_declaration): Update muscle names.
2026-03-09 20:33:03 +00:00 · 2007-01-16 06:16:04 +00:00
parent e37c665c41
commit a4e25e1dec
11 changed files with 269 additions and 214 deletions
--- a/data/bison.m4
+++ b/data/bison.m4
@@ -285,84 +285,103 @@ b4_define_user_code([pre_prologue])
 b4_define_user_code([stype])


-# b4_check_user_names(WHAT, USER-LIST, SKELETON-LIST)
-# ---------------------------------------------------
+# b4_check_user_names(WHAT, USER-LIST, SKELETON-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 the skeleton (as recorded by macros in the namespace
+# SKELETON-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 SKELETON-NAMESPACE(bar) must be defined iff the name bar of type
+# WHAT is used in the skeleton.  Empty string names are fine, but it would be
+# ugly for a Bison skeleton 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_skeleton_names for SKELETON-NAMESPACE and define
+# that the names bar and baz are used in the skeleton:
 #
-#   m4_define([b4_skeleton_foo_names],
-#             [[[[bar]], [[baz]]]])
+#   m4_define([b4_foo_skeleton_names(bar)])
+#   m4_define([b4_foo_skeleton_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
-# quoting:
+# b4_foo_user_names, with SKELETON-NAMESPACE b4_foo_skeleton_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_skeleton_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_percent_define_get(VARIABLE)
+# -------------------------------
+# If the %define variable VARIABLE is defined, emit its value.  Also, record
+# the skeleton's usage of VARIABLE by defining
+# b4_percent_define_skeleton_variables(VARIABLE).
+#
+# For example:
+#
+#   b4_percent_define_get([[foo]])
+m4_define([b4_percent_define_get],
+[m4_define([b4_percent_define_skeleton_variables(]$1[)])dnl
+m4_ifdef([b4_percent_define(]$1[)], [m4_indir([b4_percent_define(]$1[)])])])

-# b4_get_percent_code([QUALIFIER])
+# b4_percent_define_default(VARIABLE, DEFAULT)
+# --------------------------------------------
+# If the %define variable VARIABLE is undefined, set its value to DEFAULT.
+#
+# 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[)], [$2])])])
+
+# b4_percent_code_get([QUALIFIER])
 # --------------------------------
 # If any %code blocks for QUALIFIER are defined, emit them beginning with a
 # comment and ending with synclines and a newline.  If QUALIFIER is not
-# specified (thus, b4_get_percent_code is invoked without parens), do this for
-# the unqualified %code blocks.  Also, record QUALIFIER (if specified) in
-# b4_skeleton_percent_code_qualifiers.
-m4_define([b4_get_percent_code],
-[m4_pushdef([b4_macro_name], [[b4_percent_code]]m4_if([$#], [1], [[[_]$1]]))dnl
-m4_if([$#], [1],
-      [m4_append([b4_skeleton_percent_code_qualifiers], [[$1]], [[, ]])])dnl
+# specified (thus, b4_percent_code_get is invoked without parens), do this for
+# the unqualified %code blocks.  Also, record the skeleton's usage of QUALIFIER
+# (if specified) by defining b4_percent_code_skeleton_qualifiers(QUALIFIER).
+#
+# For example, to emit any unqualified %code blocks followed by any %code
+# blocks for the qualifier foo:
+#
+#   b4_percent_code_get
+#   b4_percent_code_get([[foo]])
+m4_define([b4_percent_code_get],
+[m4_pushdef([b4_macro_name], [[b4_percent_code]]m4_if([$#], [1], [[[(]$1[)]]],
+                                                      [[[_unqualified]]]))dnl
+m4_if([$#], [1], [m4_define([b4_percent_code_skeleton_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])])


@@ -371,21 +390,13 @@ m4_popdef([b4_macro_name])])
 ## %define variables and %code qualifiers were used.         ##
 ## --------------------------------------------------------- ##

+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[_skeleton_]$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]])
 ])
--- a/data/c++.m4
+++ b/data/c++.m4
@@ -26,13 +26,13 @@ m4_include(b4_pkgdatadir/[c.m4])
 ## ---------------- ##

 # Default parser class name.
-m4_define_default([b4_percent_define_parser_class_name], [parser])
-m4_define_default([b4_percent_define_location_type], [location])
-m4_define_default([b4_percent_define_filename_type], [std::string])
-m4_define_default([b4_percent_define_namespace], m4_defn([b4_prefix]))
-m4_define_default([b4_percent_define_define_location_comparison],
-                  m4_if(b4_percent_define_filename_type, [std::string],
-                        [1], [0]))
+b4_percent_define_default([[parser_class_name]], [[parser]])
+b4_percent_define_default([[location_type]], [[location]])
+b4_percent_define_default([[filename_type]], [[std::string]])
+b4_percent_define_default([[namespace]], m4_defn([b4_prefix]))
+b4_percent_define_default([[define_location_comparison]],
+                          [m4_if(b4_percent_define_get([[filename_type]]),
+                                 [std::string], [[1]], [[0]])])


 # b4_token_enums(LIST-OF-PAIRS-TOKEN-NAME-TOKEN-NUMBER)
--- a/data/glr.c
+++ b/data/glr.c
@@ -153,7 +153,7 @@ b4_copyright([Skeleton implementation for Bison GLR parsers in C],

 ]b4_identification

-b4_get_percent_code([[top]])[]dnl
+b4_percent_code_get([[top]])[]dnl
 m4_if(b4_prefix, [yy], [],
 [/* Substitute the variable and function names.  */
 #define yyparse b4_prefix[]parse
@@ -173,7 +173,7 @@ dnl # ----------------------
 dnl # Declaration that might either go into the header (if --defines)
 dnl # or open coded in the parser body.
 m4_define([b4_shared_declarations],
-[b4_get_percent_code([[requires]])[]dnl
+[b4_percent_code_get([[requires]])[]dnl

 b4_token_enums(b4_tokens)

@@ -205,7 +205,7 @@ typedef struct YYLTYPE
 # define YYLTYPE_IS_TRIVIAL 1
 #endif

-]b4_get_percent_code([[provides]])[]dnl
+]b4_percent_code_get([[provides]])[]dnl
 ])

 b4_defines_if([[#include "@basename(]b4_spec_defines_file[@)"]],
@@ -238,7 +238,7 @@ static YYSTYPE yyval_default;

 /* Copy the second part of user declarations.  */
 ]b4_user_post_prologue
-b4_get_percent_code[]dnl
+b4_percent_code_get[]dnl

 [#include <stdio.h>
 #include <stdlib.h>
--- a/data/glr.cc
+++ b/data/glr.cc
@@ -58,9 +58,9 @@ m4_include(b4_pkgdatadir/[c++.m4])
 m4_include(b4_pkgdatadir/[location.cc])

 m4_define([b4_parser_class_name],
-          [b4_get_percent_define([[parser_class_name]])])
+          [b4_percent_define_get([[parser_class_name]])])
 m4_define([b4_namespace],
-          [b4_get_percent_define([[namespace]])])
+          [b4_percent_define_get([[namespace]])])

 # Save the parse parameters.
 m4_define([b4_parse_param_orig], m4_defn([b4_parse_param]))
@@ -230,7 +230,7 @@ b4_copyright([Skeleton interface for Bison GLR parsers in C++],
 #ifndef PARSER_HEADER_H
 # define PARSER_HEADER_H

-]b4_get_percent_code([[requires]])[
+]b4_percent_code_get([[requires]])[

 #include <string>
 #include <iostream>
@@ -290,7 +290,7 @@ b4_user_stype
    typedef YYSTYPE semantic_type;
 #endif
    /// Symbol locations.
-    typedef ]b4_get_percent_define([[location_type]])[ location_type;
+    typedef ]b4_percent_define_get([[location_type]])[ location_type;
    /// Tokens.
    struct token
    {
@@ -365,7 +365,7 @@ b4_user_stype
  };

 ]dnl Redirections for glr.c.
-m4_ifval(b4_get_percent_define([[global_tokens_and_yystype]]),
+m4_ifval(b4_percent_define_get([[global_tokens_and_yystype]]),
 [b4_token_defines(b4_tokens)])
 [
 #ifndef YYSTYPE
@@ -377,7 +377,7 @@ m4_ifval(b4_get_percent_define([[global_tokens_and_yystype]]),

 }

-]b4_get_percent_code([[provides]])[]dnl
+]b4_percent_code_get([[provides]])[]dnl

 [#endif /* ! defined PARSER_HEADER_H */]
 m4_divert_pop(0)
--- a/data/lalr1.cc
+++ b/data/lalr1.cc
@@ -20,9 +20,9 @@
 m4_include(b4_pkgdatadir/[c++.m4])

 m4_define([b4_parser_class_name],
-          [b4_get_percent_define([[parser_class_name]])])
+          [b4_percent_define_get([[parser_class_name]])])
 m4_define([b4_namespace],
-          [b4_get_percent_define([[namespace]])])
+          [b4_percent_define_get([[namespace]])])

 # The header is mandatory.
 b4_defines_if([],
@@ -46,7 +46,7 @@ dnl FIXME: This is wrong, we want computed header guards.
 #ifndef PARSER_HEADER_H
 # define PARSER_HEADER_H

-]b4_get_percent_code([[requires]])[
+]b4_percent_code_get([[requires]])[

 #include <string>
 #include <iostream>
@@ -118,7 +118,7 @@ b4_user_stype
    typedef YYSTYPE semantic_type;
 #endif
    /// Symbol locations.
-    typedef ]b4_get_percent_define([[location_type]])[ location_type;
+    typedef ]b4_percent_define_get([[location_type]])[ location_type;
    /// Tokens.
    struct token
    {
@@ -289,7 +289,7 @@ b4_error_verbose_if([, int tok])[);
  };
 }

-]m4_ifval(b4_get_percent_define([[global_tokens_and_yystype]]),
+]m4_ifval(b4_percent_define_get([[global_tokens_and_yystype]]),
 [b4_token_defines(b4_tokens)

 #ifndef YYSTYPE
@@ -297,14 +297,14 @@ b4_error_verbose_if([, int tok])[);
 # define YYSTYPE b4_namespace::b4_parser_class_name::semantic_type
 #endif
 ])
-b4_get_percent_code([[provides]])[]dnl
+b4_percent_code_get([[provides]])[]dnl

 [#endif /* ! defined PARSER_HEADER_H */]
 ])dnl
@output(b4_parser_file_name@)
 b4_copyright([Skeleton implementation for Bison LALR(1) parsers in C++],
  [2002, 2003, 2004, 2005, 2006])
-b4_get_percent_code([[top]])[]dnl
+b4_percent_code_get([[top]])[]dnl
 m4_if(b4_prefix, [yy], [],
 [
 // Take the name prefix into account.
@@ -318,7 +318,7 @@ b4_defines_if([[

 /* User implementation prologue.  */
 ]b4_user_post_prologue
-b4_get_percent_code[]dnl
+b4_percent_code_get[]dnl

 [#ifndef YY_
 # if YYENABLE_NLS
--- a/data/location.cc
+++ b/data/location.cc
@@ -26,7 +26,7 @@ b4_copyright([Positions for Bison parsers in C++],

 /**
 ** \file position.hh
- ** Define the ]b4_get_percent_define([[namespace]])[::position class.
+ ** Define the ]b4_percent_define_get([[namespace]])[::position class.
 */

 #ifndef BISON_POSITION_HH
@@ -36,7 +36,7 @@ b4_copyright([Positions for Bison parsers in C++],
 # include <string>
 # include <algorithm>

-namespace ]b4_get_percent_define([[namespace]])[
+namespace ]b4_percent_define_get([[namespace]])[
 {
  /// Abstract a position.
  class position
@@ -51,7 +51,7 @@ namespace ]b4_get_percent_define([[namespace]])[

 ])[
    /// Initialization.
-    inline void initialize (]b4_get_percent_define([[filename_type]])[* fn)
+    inline void initialize (]b4_percent_define_get([[filename_type]])[* fn)
    {
      filename = fn;
      line = ]b4_location_initial_line[;
@@ -77,7 +77,7 @@ namespace ]b4_get_percent_define([[namespace]])[

  public:
    /// File name to which this position refers.
-    ]b4_get_percent_define([[filename_type]])[* filename;
+    ]b4_percent_define_get([[filename_type]])[* filename;
    /// Current line number.
    unsigned int line;
    /// Current column number.
@@ -113,7 +113,7 @@ namespace ]b4_get_percent_define([[namespace]])[
  {
    return begin + -width;
  }
-]m4_if(b4_get_percent_define([[define_location_comparison]]), [1], [[
+]m4_if(b4_percent_define_get([[define_location_comparison]]), [1], [[
  /// Compare two position objects.
  inline bool
  operator== (const position& pos1, const position& pos2)
@@ -151,7 +151,7 @@ b4_copyright([Locations for Bison parsers in C++],

 /**
 ** \file location.hh
- ** Define the ]b4_get_percent_define([[namespace]])[::location class.
+ ** Define the ]b4_percent_define_get([[namespace]])[::location class.
 */

 #ifndef BISON_LOCATION_HH
@@ -161,7 +161,7 @@ b4_copyright([Locations for Bison parsers in C++],
 # include <string>
 # include "position.hh"

-namespace ]b4_get_percent_define([[namespace]])[
+namespace ]b4_percent_define_get([[namespace]])[
 {

  /// Abstract a location.
@@ -177,7 +177,7 @@ namespace ]b4_get_percent_define([[namespace]])[

 ])[
    /// Initialization.
-    inline void initialize (]b4_get_percent_define([[filename_type]])[* fn)
+    inline void initialize (]b4_percent_define_get([[filename_type]])[* fn)
    {
      begin.initialize (fn);
      end = begin;
@@ -235,7 +235,7 @@ namespace ]b4_get_percent_define([[namespace]])[
    res.columns (width);
    return res;
  }
-]m4_if(b4_get_percent_define([[define_location_comparison]]), [1], [[
+]m4_if(b4_percent_define_get([[define_location_comparison]]), [1], [[
  /// Compare two location objects.
  inline bool
  operator== (const location& loc1, const location& loc2)
--- a/data/push.c
+++ b/data/push.c
@@ -160,7 +160,7 @@ b4_copyright([Skeleton implementation for Bison's Yacc-like parsers in C],dnl '
   USER NAME SPACE" below.  */

 ]b4_identification
-b4_get_percent_code([[top]])[]dnl
+b4_percent_code_get([[top]])[]dnl
 m4_if(b4_prefix, [yy], [],
 [[/* Substitute the variable and function names.  */
 ]b4_pull_if([[#define yyparse         ]b4_prefix[parse
@@ -198,7 +198,7 @@ m4_if(b4_prefix, [yy], [],
 # define YYTOKEN_TABLE ]b4_token_table[
 #endif

-]b4_get_percent_code([[requires]])[]dnl
+]b4_percent_code_get([[requires]])[]dnl

 b4_token_enums_defines(b4_tokens)[

@@ -250,11 +250,11 @@ b4_c_function_decl([[yypstate_delete]], [[void]],
                   [[[yypstate *yyps]], [[yyps]]])[
 #endif
 ]])
-b4_get_percent_code([[provides]])[]dnl
+b4_percent_code_get([[provides]])[]dnl

 [/* Copy the second part of user declarations.  */
 ]b4_user_post_prologue
-b4_get_percent_code[]dnl
+b4_percent_code_get[]dnl

 [#ifdef short
 # undef short
@@ -1656,7 +1656,7 @@ b4_defines_if(
 b4_copyright([Skeleton interface for Bison's Yacc-like parsers in C],dnl '
  [1984, 1989, 1990, 2000, 2001, 2002, 2003, 2004, 2005, 2006])

-b4_get_percent_code([[requires]])[]dnl
+b4_percent_code_get([[requires]])[]dnl

 b4_token_enums_defines(b4_tokens)

@@ -1714,6 +1714,6 @@ b4_c_function_decl([b4_prefix[pstate_delete]], [[void]],
                   [[b4_prefix[pstate *yyps]], [[yyps]]])[
 #endif
 ]])
-b4_get_percent_code([[provides]])[]dnl
+b4_percent_code_get([[provides]])[]dnl
 ])dnl b4_defines_if
 m4_divert_pop(0)
--- a/data/yacc.c
+++ b/data/yacc.c
@@ -152,7 +152,7 @@ b4_copyright([Skeleton implementation for Bison's Yacc-like parsers in C],dnl '
   USER NAME SPACE" below.  */

 ]b4_identification
-b4_get_percent_code([[top]])[]dnl
+b4_percent_code_get([[top]])[]dnl
 m4_if(b4_prefix, [yy], [],
 [/* Substitute the variable and function names.  */
 #define yyparse b4_prefix[]parse
@@ -185,7 +185,7 @@ b4_locations_if([#define yylloc b4_prefix[]lloc])])[
 # define YYTOKEN_TABLE ]b4_token_table[
 #endif

-]b4_get_percent_code([[requires]])[]dnl
+]b4_percent_code_get([[requires]])[]dnl

 b4_token_enums_defines(b4_tokens)[

@@ -216,11 +216,11 @@ typedef struct YYLTYPE
 # define YYLTYPE_IS_TRIVIAL 1
 #endif])

-b4_get_percent_code([[provides]])[]dnl
+b4_percent_code_get([[provides]])[]dnl

 [/* Copy the second part of user declarations.  */
 ]b4_user_post_prologue
-b4_get_percent_code[]dnl
+b4_percent_code_get[]dnl

 [#ifdef short
 # undef short
@@ -1491,7 +1491,7 @@ b4_defines_if(
 b4_copyright([Skeleton interface for Bison's Yacc-like parsers in C],dnl '
  [1984, 1989, 1990, 2000, 2001, 2002, 2003, 2004, 2005, 2006])

-b4_get_percent_code([[requires]])[]dnl
+b4_percent_code_get([[requires]])[]dnl

 b4_token_enums_defines(b4_tokens)

@@ -1530,7 +1530,7 @@ typedef struct YYLTYPE
 	   [extern YYLTYPE b4_prefix[]lloc;])
 )dnl b4_locations_if

-b4_get_percent_code([[provides]])
+b4_percent_code_get([[provides]])
 ])dnl b4_defines_if
 m4_divert_pop(0)