gdb: Convert language la_word_break_characters field to a method

This commit changes the language_data::la_word_break_characters
function pointer member variable into a member function of
language_defn.

There should be no user visible changes after this commit.

gdb/ChangeLog:

	* ada-lang.c (ada_get_gdb_completer_word_break_characters): Delete.
	(ada_language_data): Delete la_word_break_characters initializer.
	(ada_language::word_break_characters): New member function.
	* c-lang.c (c_language_data): Delete la_word_break_characters
	initializer.
	(cplus_language_data): Likewise.
	(asm_language_data): Likewise.
	(minimal_language_data): Likewise.
	* completer.c: Update global comment.
	(advance_to_expression_complete_word_point): Update call to
	word_break_characters.
	(complete_files_symbols): Likewise.
	(complete_line_internal_1): Likewise.
	(default_completer_handle_brkchars): Likewise.
	(skip_quoted_chars): Likewise.
	* d-lang.c (d_language_data): Delete la_word_break_characters
	initializer.
	* f-lang.c (f_word_break_characters): Delete.
	(f_language_data): Delete la_word_break_characters initializer.
	(f_language::word_break_characters): New member function.
	* go-lang.c (go_language_data): Delete la_word_break_characters
	initializer.
	* language.c (unknown_language_data): Likewise.
	(auto_language_data): Likewise.
	* language.h (default_word_break_characters): Move declaration to
	earlier in the file.
	(language_data): Delete la_word_break_characters field.
	(language_defn::word_break_characters): New member function.
	* m2-lang.c (m2_language_data): Delete la_word_break_characters
	initializer.
	* objc-lang.c (objc_language_data): Likewise.
	* opencl-lang.c (opencl_language_data): Likewise.
	* p-lang.c (pascal_language_data): Likewise.
	* rust-lang.c (rust_language_data): Likewise.

gdb/ChangeLog

@@ -1,3 +1,40 @@
+2020-06-17  Andrew Burgess  <andrew.burgess@embecosm.com>
+
+	* ada-lang.c (ada_get_gdb_completer_word_break_characters): Delete.
+	(ada_language_data): Delete la_word_break_characters initializer.
+	(ada_language::word_break_characters): New member function.
+	* c-lang.c (c_language_data): Delete la_word_break_characters
+	initializer.
+	(cplus_language_data): Likewise.
+	(asm_language_data): Likewise.
+	(minimal_language_data): Likewise.
+	* completer.c: Update global comment.
+	(advance_to_expression_complete_word_point): Update call to
+	word_break_characters.
+	(complete_files_symbols): Likewise.
+	(complete_line_internal_1): Likewise.
+	(default_completer_handle_brkchars): Likewise.
+	(skip_quoted_chars): Likewise.
+	* d-lang.c (d_language_data): Delete la_word_break_characters
+	initializer.
+	* f-lang.c (f_word_break_characters): Delete.
+	(f_language_data): Delete la_word_break_characters initializer.
+	(f_language::word_break_characters): New member function.
+	* go-lang.c (go_language_data): Delete la_word_break_characters
+	initializer.
+	* language.c (unknown_language_data): Likewise.
+	(auto_language_data): Likewise.
+	* language.h (default_word_break_characters): Move declaration to
+	earlier in the file.
+	(language_data): Delete la_word_break_characters field.
+	(language_defn::word_break_characters): New member function.
+	* m2-lang.c (m2_language_data): Delete la_word_break_characters
+	initializer.
+	* objc-lang.c (objc_language_data): Likewise.
+	* opencl-lang.c (opencl_language_data): Likewise.
+	* p-lang.c (pascal_language_data): Likewise.
+	* rust-lang.c (rust_language_data): Likewise.
+
 2020-06-17  Andrew Burgess  <andrew.burgess@embecosm.com>
 
 	* ada-lang.c (ada_get_symbol_name_matcher): Update header comment.

gdb/ada-lang.c

@@ -488,12 +488,6 @@ add_angle_brackets (const char *str)
   return string_printf ("<%s>", str);
 }
 
-static const char *
-ada_get_gdb_completer_word_break_characters (void)
-{
-  return ada_completer_word_break_characters;
-}
-
 /* la_watch_location_expression for Ada.  */
 
 static gdb::unique_xmalloc_ptr<char>
@@ -13917,7 +13911,6 @@ extern const struct language_data ada_language_data =
   ada_op_print_tab,             /* expression operators for printing */
   0,                            /* c-style arrays */
   1,                            /* String lower bound */
-  ada_get_gdb_completer_word_break_characters,
   ada_collect_symbol_completion_matches,
   ada_watch_location_expression,
   &ada_varobj_ops,
@@ -14105,6 +14098,13 @@ public:
     ada_print_type (type, varstring, stream, show, level, flags);
   }
 
+  /* See language.h.  */
+
+  const char *word_break_characters (void) const override
+  {
+    return ada_completer_word_break_characters;
+  }
+
 protected:
   /* See language.h.  */
 

gdb/c-lang.c

@@ -914,7 +914,6 @@ extern const struct language_data c_language_data =
   c_op_print_tab,		/* expression operators for printing */
   1,				/* c-style arrays */
   0,				/* String lower bound */
-  default_word_break_characters,
   default_collect_symbol_completion_matches,
   c_watch_location_expression,
   &c_varobj_ops,
@@ -1028,7 +1027,6 @@ extern const struct language_data cplus_language_data =
   c_op_print_tab,		/* expression operators for printing */
   1,				/* c-style arrays */
   0,				/* String lower bound */
-  default_word_break_characters,
   default_collect_symbol_completion_matches,
   c_watch_location_expression,
   &cplus_varobj_ops,
@@ -1230,7 +1228,6 @@ extern const struct language_data asm_language_data =
   c_op_print_tab,		/* expression operators for printing */
   1,				/* c-style arrays */
   0,				/* String lower bound */
-  default_word_break_characters,
   default_collect_symbol_completion_matches,
   c_watch_location_expression,
   &default_varobj_ops,
@@ -1299,7 +1296,6 @@ extern const struct language_data minimal_language_data =
   c_op_print_tab,		/* expression operators for printing */
   1,				/* c-style arrays */
   0,				/* String lower bound */
-  default_word_break_characters,
   default_collect_symbol_completion_matches,
   c_watch_location_expression,
   &default_varobj_ops,

gdb/completer.c

@@ -155,7 +155,7 @@ enum explicit_location_match_type
    but it does affect how much stuff M-? lists.
    (2) If one of the matches contains a word break character, readline
    will quote it.  That's why we switch between
-   current_language->la_word_break_characters() and
+   current_language->word_break_characters () and
    gdb_completer_command_word_break_characters.  I'm not sure when
    we need this behavior (perhaps for funky characters in C++ 
    symbols?).  */
@@ -448,7 +448,7 @@ const char *
 advance_to_expression_complete_word_point (completion_tracker &tracker,
 					   const char *text)
 {
-  const char *brk_chars = current_language->la_word_break_characters ();
+  const char *brk_chars = current_language->word_break_characters ();
   return advance_to_completion_word (tracker, brk_chars, text);
 }
 
@@ -573,7 +573,7 @@ complete_files_symbols (completion_tracker &tracker,
 	  colon = p;
 	  symbol_start = p + 1;
 	}
-      else if (strchr (current_language->la_word_break_characters(), *p))
+      else if (strchr (current_language->word_break_characters (), *p))
 	symbol_start = p + 1;
     }
 
@@ -1348,7 +1348,7 @@ complete_line_internal_1 (completion_tracker &tracker,
      strings, which leaves out the '-' and '.' character used in some
      commands.  */
   set_rl_completer_word_break_characters
-    (current_language->la_word_break_characters());
+    (current_language->word_break_characters ());
 
   /* Decide whether to complete on a list of gdb commands or on
      symbols.  */
@@ -1964,7 +1964,7 @@ default_completer_handle_brkchars (struct cmd_list_element *ignore,
 				   const char *text, const char *word)
 {
   set_rl_completer_word_break_characters
-    (current_language->la_word_break_characters ());
+    (current_language->word_break_characters ());
 }
 
 /* See definition in completer.h.  */
@@ -2473,7 +2473,7 @@ skip_quoted_chars (const char *str, const char *quotechars,
     quotechars = gdb_completer_quote_characters;
 
   if (breakchars == NULL)
-    breakchars = current_language->la_word_break_characters();
+    breakchars = current_language->word_break_characters ();
 
   for (scan = str; *scan != '\0'; scan++)
     {

gdb/d-lang.c

@@ -157,7 +157,6 @@ extern const struct language_data d_language_data =
   d_op_print_tab,		/* Expression operators for printing.  */
   1,				/* C-style arrays.  */
   0,				/* String lower bound.  */
-  default_word_break_characters,
   default_collect_symbol_completion_matches,
   c_watch_location_expression,
   &default_varobj_ops,

gdb/f-lang.c

@@ -165,30 +165,6 @@ enum f_primitive_types {
   nr_f_primitive_types
 };
 
-/* Remove the modules separator :: from the default break list.  */
-
-static const char *
-f_word_break_characters (void)
-{
-  static char *retval;
-
-  if (!retval)
-    {
-      char *s;
-
-      retval = xstrdup (default_word_break_characters ());
-      s = strchr (retval, ':');
-      if (s)
-	{
-	  char *last_char = &s[strlen (s) - 1];
-
-	  *s = *last_char;
-	  *last_char = 0;
-	}
-    }
-  return retval;
-}
-
 /* Consider the modules separator :: as a valid symbol name character
    class.  */
 
@@ -617,7 +593,6 @@ extern const struct language_data f_language_data =
   f_op_print_tab,		/* expression operators for printing */
   0,				/* arrays are first-class (not c-style) */
   1,				/* String lower bound */
-  f_word_break_characters,
   f_collect_symbol_completion_matches,
   c_watch_location_expression,
   &default_varobj_ops,
@@ -699,6 +674,30 @@ public:
     f_print_type (type, varstring, stream, show, level, flags);
   }
 
+  /* See language.h.  This just returns default set of word break
+     characters but with the modules separator `::' removed.  */
+
+  const char *word_break_characters (void) const override
+  {
+    static char *retval;
+
+    if (!retval)
+      {
+	char *s;
+
+	retval = xstrdup (language_defn::word_break_characters ());
+	s = strchr (retval, ':');
+	if (s)
+	  {
+	    char *last_char = &s[strlen (s) - 1];
+
+	    *s = *last_char;
+	    *last_char = 0;
+	  }
+      }
+    return retval;
+  }
+
 protected:
 
   /* See language.h.  */

gdb/go-lang.c

@@ -542,7 +542,6 @@ extern const struct language_data go_language_data =
   go_op_print_tab,		/* Expression operators for printing.  */
   1,				/* C-style arrays.  */
   0,				/* String lower bound.  */
-  default_word_break_characters,
   default_collect_symbol_completion_matches,
   c_watch_location_expression,
   &default_varobj_ops,

gdb/language.c

@@ -779,7 +779,6 @@ extern const struct language_data unknown_language_data =
   unk_op_print_tab,		/* expression operators for printing */
   1,				/* c-style arrays */
   0,				/* String lower bound */
-  default_word_break_characters,
   default_collect_symbol_completion_matches,
   c_watch_location_expression,
   &default_varobj_ops,
@@ -852,7 +851,6 @@ extern const struct language_data auto_language_data =
   unk_op_print_tab,		/* expression operators for printing */
   1,				/* c-style arrays */
   0,				/* String lower bound */
-  default_word_break_characters,
   default_collect_symbol_completion_matches,
   c_watch_location_expression,
   &default_varobj_ops,

gdb/language.h

@@ -169,6 +169,9 @@ struct language_pass_by_ref_info
   bool destructible = true;
 };
 
+/* Splitting strings into words.  */
+extern const char *default_word_break_characters (void);
+
 /* Structure tying together assorted information about a language.
 
    As we move over from the old structure based languages to a class
@@ -316,9 +319,6 @@ struct language_data
     /* Index to use for extracting the first element of a string.  */
     char string_lower_bound;
 
-    /* The list of characters forming word boundaries.  */
-    const char *(*la_word_break_characters) (void);
-
     /* Add to the completion tracker all symbols which are possible
        completions for TEXT.  WORD is the entire command on which the
        completion is being made.  If CODE is TYPE_CODE_UNDEF, then all
@@ -529,6 +529,12 @@ struct language_defn : language_data
     return nullptr;
   }
 
+  /* The list of characters forming word boundaries.  */
+  virtual const char *word_break_characters (void) const
+  {
+    return default_word_break_characters ();
+  }
+
   /* List of all known languages.  */
   static const struct language_defn *languages[nr_languages];
 
@@ -691,9 +697,6 @@ extern CORE_ADDR skip_language_trampoline (struct frame_info *, CORE_ADDR pc);
 extern char *language_demangle (const struct language_defn *current_language, 
 				const char *mangled, int options);
 
-/* Splitting strings into words.  */
-extern const char *default_word_break_characters (void);
-
 /* Return information about whether TYPE should be passed
    (and returned) by reference at the language level.  */
 struct language_pass_by_ref_info language_pass_by_reference (struct type *type);

gdb/m2-lang.c

@@ -376,7 +376,6 @@ extern const struct language_data m2_language_data =
   m2_op_print_tab,		/* expression operators for printing */
   0,				/* arrays are first-class (not c-style) */
   0,				/* String lower bound */
-  default_word_break_characters,
   default_collect_symbol_completion_matches,
   c_watch_location_expression,
   &default_varobj_ops,

gdb/objc-lang.c

@@ -351,7 +351,6 @@ extern const struct language_data objc_language_data =
   objc_op_print_tab,		/* Expression operators for printing */
   1,				/* C-style arrays */
   0,				/* String lower bound */
-  default_word_break_characters,
   default_collect_symbol_completion_matches,
   c_watch_location_expression,
   &default_varobj_ops,

gdb/opencl-lang.c

@@ -1030,7 +1030,6 @@ extern const struct language_data opencl_language_data =
   c_op_print_tab,		/* expression operators for printing */
   1,				/* c-style arrays */
   0,				/* String lower bound */
-  default_word_break_characters,
   default_collect_symbol_completion_matches,
   c_watch_location_expression,
   &default_varobj_ops,

gdb/p-lang.c

@@ -407,7 +407,6 @@ extern const struct language_data pascal_language_data =
   pascal_op_print_tab,		/* expression operators for printing */
   1,				/* c-style arrays */
   0,				/* String lower bound */
-  default_word_break_characters,
   default_collect_symbol_completion_matches,
   c_watch_location_expression,
   &default_varobj_ops,

gdb/rust-lang.c

@@ -2062,7 +2062,6 @@ extern const struct language_data rust_language_data =
   c_op_print_tab,		/* expression operators for printing */
   1,				/* c-style arrays */
   0,				/* String lower bound */
-  default_word_break_characters,
   default_collect_symbol_completion_matches,
   rust_watch_location_expression,
   &default_varobj_ops,