gdb: Convert language la_sniff_from_mangled_name field to a method

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

Previously the la_sniff_from_mangled_name pointer was NULL for some
languages, however, all uses of this function pointer were through the
function language_sniff_from_mangled_name which provided a default
implementation.

This default implementation now becomes the implementation in the base
class language_defn, which is then overridden as required in various
language sub-classes.

There should be no user visible changes after this commit.

gdb/ChangeLog:

	* ada-lang.c (ada_sniff_from_mangled_name): Delete function,
	implementation moves to...
	(ada_language::sniff_from_mangled_name): ...here.  Update return
	type.
	(ada_language_data): Delete la_sniff_from_mangled_name
	initializer.
	* c-lang.c (c_language_data): Likewise.
	(cplus_language_data): Likewise.
	(cplus_language::sniff_from_mangled_name): New member function,
	implementation taken from gdb_sniff_from_mangled_name.
	(asm_language_data): Delete la_sniff_from_mangled_name
	initializer.
	(minimal_language_data): Likewise.
	* cp-support.c (gdb_sniff_from_mangled_name): Delete,
	implementation moves to cplus_language::sniff_from_mangled_name.
	* cp-support.h (gdb_sniff_from_mangled_name): Delete declaration.
	* d-lang.c (d_sniff_from_mangled_name): Delete, implementation
	moves to...
	(d_language::sniff_from_mangled_name): ...here.
	(d_language_data): Delete la_sniff_from_mangled_name initializer.
	* f-lang.c (f_language_data): Likewise.
	* go-lang.c (go_sniff_from_mangled_name): Delete, implementation
	moves to...
	(go_language::sniff_from_mangled_name): ...here.
	(go_language_data): Delete la_sniff_from_mangled_name initializer.
	* language.c (language_sniff_from_mangled_name): Delete.
	(unknown_language_data): Delete la_sniff_from_mangled_name
	initializer.
	(auto_language_data): Likewise.
	* language.h (language_data): Delete la_sniff_from_mangled_name
	field.
	(language_defn::sniff_from_mangled_name): New function.
	(language_sniff_from_mangled_name): Delete declaration.
	* m2-lang.c (m2_language_data): Delete la_sniff_from_mangled_name
	field.
	* objc-lang.c (objc_sniff_from_mangled_name): Delete,
	implementation moves to...
	(objc_language::sniff_from_mangled_name): ...here.
	(objc_language_data): Delete la_sniff_from_mangled_name initializer.
	* opencl-lang.c (opencl_language_data): Likewise.
	* p-lang.c (pascal_language_data): Likewise.
	* rust-lang.c (rust_sniff_from_mangled_name): Delete,
	implementation moves to...
	(rust_language::sniff_from_mangled_name): ...here.
	(rust_language_data): Delete la_sniff_from_mangled_name
	initializer.
	* symtab.c (symbol_find_demangled_name): Call
	sniff_from_mangled_name member function.

1 files changed, 8 insertions, 10 deletions

diff --git a/gdb/go-lang.c b/gdb/go-lang.c
index 8491c97..dce7e6a 100644
--- a/gdb/go-lang.c
+++ b/gdb/go-lang.c
@@ -396,15 +396,6 @@ go_demangle (const char *mangled_name, int options)
   return result;
 }
 
-/* la_sniff_from_mangled_name for Go.  */
-
-static int
-go_sniff_from_mangled_name (const char *mangled, char **demangled)
-{
-  *demangled = go_demangle (mangled, 0);
-  return *demangled != NULL;
-}
-
 /* Given a Go symbol, return its package or NULL if unknown.
    Space for the result is malloc'd, caller must free.  */
 
@@ -551,7 +542,6 @@ extern const struct language_data go_language_data =
   false,			/* la_store_sym_names_in_linkage_form_p */
   basic_lookup_symbol_nonlocal, 
   go_demangle,			/* Language specific symbol demangler.  */
-  go_sniff_from_mangled_name,
   NULL,				/* Language specific
 				   class_name_from_physname.  */
   go_op_print_tab,		/* Expression operators for printing.  */
@@ -628,6 +618,14 @@ public:
     lai->bool_type_symbol = "bool";
     lai->bool_type_default = builtin->builtin_bool;
   }
+
+  /* See language.h.  */
+  bool sniff_from_mangled_name (const char *mangled,
+				char **demangled) const override
+  {
+    *demangled = go_demangle (mangled, 0);
+    return *demangled != NULL;
+  }
 };
 
 /* Single instance of the Go language class.  */