gdb: Convert language la_is_string_type_p field to a method

This commit changes the language_data::la_is_string_type_p 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_language_data): Delete la_is_string_type_p
	initializer.
	(ada_language::is_string_type_p): New member function.
	* c-lang.c (c_language_data): Delete la_is_string_type_p
	initializer.
	(cplus_language_data): Likewise.
	(asm_language_data): Likewise.
	(minimal_language_data): Likewise.
	* d-lang.c (d_language_data): Likewise.
	* f-lang.c (f_is_string_type_p): Delete function, implementation
	moved to f_language::is_string_type_p.
	(f_language_data): Delete la_is_string_type_p initializer.
	(f_language::is_string_type_p): New member function,
	implementation from f_is_string_type_p.
	* go-lang.c (go_is_string_type_p): Delete function, implementation
	moved to go_language::is_string_type_p.
	(go_language_data): Delete la_is_string_type_p initializer.
	(go_language::is_string_type_p): New member function,
	implementation from go_is_string_type_p.
	* language.c (language_defn::is_string_type_p): Define new member
	function.
	(default_is_string_type_p): Make static, add comment copied from
	header file.
	(unknown_language_data): Delete la_is_string_type_p initializer.
	(unknown_language::is_string_type_p): New member function.
	(auto_language_data): Delete la_is_string_type_p initializer.
	(auto_language::is_string_type_p): New member function.
	* language.h (language_data): Delete la_is_string_type_p field.
	(language_defn::is_string_type_p): Declare new function.
	(default_is_string_type_p): Delete desclaration, move comment to
	definition.
	* m2-lang.c (m2_is_string_type_p): Delete function, implementation
	moved to m2_language::is_string_type_p.
	(m2_language_data): Delete la_is_string_type_p initializer.
	(m2_language::is_string_type_p): New member function,
	implementation from m2_is_string_type_p.
	* objc-lang.c (objc_language_data): Delete la_is_string_type_p
	initializer.
	* opencl-lang.c (opencl_language_data): Likewise.
	* p-lang.c (pascal_is_string_type_p): Delete function,
	implementation moved to pascal_language::is_string_type_p.
	(pascal_language_data): Delete la_is_string_type_p initializer.
	(pascal_language::is_string_type_p): New member function,
	implementation from pascal_is_string_type_p.
	* rust-lang.c (rust_is_string_type_p): Delete function,
	implementation moved to rust_language::is_string_type_p.
	(rust_language_data): Delete la_is_string_type_p initializer.
	(rust_language::is_string_type_p): New member function,
	implementation from rust_is_string_type_p.
	* valprint.c (val_print_scalar_or_string_type_p): Update call to
	is_string_type_p.

1 files changed, 19 insertions, 22 deletions

diff --git a/gdb/m2-lang.c b/gdb/m2-lang.c
index f0f7c22..2c39359 100644
--- a/gdb/m2-lang.c
+++ b/gdb/m2-lang.c
@@ -42,27 +42,6 @@ m2_printchar (int c, struct type *type, struct ui_file *stream)
   fputs_filtered ("'", stream);
 }
 
-/* Return true if TYPE is a string.  */
-
-static bool
-m2_is_string_type_p (struct type *type)
-{
-  type = check_typedef (type);
-  if (type->code () == TYPE_CODE_ARRAY
-      && TYPE_LENGTH (type) > 0
-      && TYPE_LENGTH (TYPE_TARGET_TYPE (type)) > 0)
-    {
-      struct type *elttype = check_typedef (TYPE_TARGET_TYPE (type));
-
-      if (TYPE_LENGTH (elttype) == 1
-	  && (elttype->code () == TYPE_CODE_INT
-	      || elttype->code () == TYPE_CODE_CHAR))
-	return true;
-    }
-
-  return false;
-}
-
 static struct value *
 evaluate_subexp_modula2 (struct type *expect_type, struct expression *exp,
 			 int *pos, enum noside noside)
@@ -235,7 +214,6 @@ extern const struct language_data m2_language_data =
   0,				/* arrays are first-class (not c-style) */
   0,				/* String lower bound */
   &default_varobj_ops,
-  m2_is_string_type_p,
   "{...}"			/* la_struct_too_deep_ellipsis */
 };
 
@@ -435,6 +413,25 @@ public:
     m2_print_typedef (type, new_symbol, stream);
   }
 
+  /* See language.h.  */
+
+  bool is_string_type_p (struct type *type) const override
+  {
+    type = check_typedef (type);
+    if (type->code () == TYPE_CODE_ARRAY
+	&& TYPE_LENGTH (type) > 0
+	&& TYPE_LENGTH (TYPE_TARGET_TYPE (type)) > 0)
+      {
+	struct type *elttype = check_typedef (TYPE_TARGET_TYPE (type));
+
+	if (TYPE_LENGTH (elttype) == 1
+	    && (elttype->code () == TYPE_CODE_INT
+		|| elttype->code () == TYPE_CODE_CHAR))
+	  return true;
+      }
+
+    return false;
+  }
 };
 
 /* Single instance of the M2 language.  */