Remove varobj_language_string, languages and varobj_languages

This patch does some cleanups, removing some language-related stuff.
Note that mi_cmd_var_info_expression uses varobj_language_string,
which is redundant, because we can get language name from
lang->la_natural_name.

varobj_language_string doesn't have "Ada", which looks like a bug to
me.  With this patch applied, this problem doesn't exist, because the
language name is got from the same place (field la_natural_name).

gdb:

2013-11-07  Yao Qi  <yao@codesourcery.com>

	* mi/mi-cmd-var.c: Include "language.h".
	(mi_cmd_var_info_expression): Get language name from
	language_defn.
	* varobj.c (varobj_language_string): Remove.
	(variable_language): Remove declaration.
	(languages): Remove.
	(varobj_get_language): Change the type of return value.
	(variable_language): Remove.
	* varobj.h (enum varobj_languages): Remove.
	(varobj_language_string): Remove declaration.
	(varobj_get_language): Update declaration.

gdb/doc:

2013-11-07  Yao Qi  <yao@codesourcery.com>

	* gdb.texinfo (GDB/MI Variable Objects): Update doc about the
	output of "-var-info-expression".

1 files changed, 2 insertions, 41 deletions

diff --git a/gdb/varobj.c b/gdb/varobj.c
index b5cf17d..f15c9de 100644
--- a/gdb/varobj.c
+++ b/gdb/varobj.c
@@ -55,9 +55,6 @@ show_varobjdebug (struct ui_file *file, int from_tty,
 char *varobj_format_string[] =
   { "natural", "binary", "decimal", "hexadecimal", "octal" };
 
-/* String representations of gdb's known languages.  */
-char *varobj_language_string[] = { "C", "C++", "Java" };
-
 /* True if we want to allow Python-based pretty-printing.  */
 static int pretty_printing = 0;
 
@@ -199,8 +196,6 @@ static int install_new_value (struct varobj *var, struct value *value,
 
 /* Language-specific routines.  */
 
-static enum varobj_languages variable_language (struct varobj *var);
-
 static int number_of_children (struct varobj *);
 
 static char *name_of_variable (struct varobj *);
@@ -224,14 +219,6 @@ static struct varobj *varobj_add_child (struct varobj *var,
 
 #endif /* HAVE_PYTHON */
 
-/* Array of known source language routines.  */
-static const struct lang_varobj_ops *languages[vlang_end] = {
-  &c_varobj_ops,
-  &cplus_varobj_ops,
-  &java_varobj_ops,
-  &ada_varobj_ops,
-};
-
 /* Private data */
 
 /* Mappings of varobj_display_formats enums to gdb's format codes.  */
@@ -1126,10 +1113,10 @@ varobj_get_path_expr (struct varobj *var)
     }
 }
 
-enum varobj_languages
+const struct language_defn *
 varobj_get_language (struct varobj *var)
 {
-  return variable_language (var);
+  return var->root->exp->language_defn;
 }
 
 int
@@ -2332,32 +2319,6 @@ cppop (struct cpstack **pstack)
 
 /* Common entry points */
 
-/* Get the language of variable VAR.  */
-static enum varobj_languages
-variable_language (struct varobj *var)
-{
-  enum varobj_languages lang;
-
-  switch (var->root->exp->language_defn->la_language)
-    {
-    default:
-    case language_c:
-      lang = vlang_c;
-      break;
-    case language_cplus:
-      lang = vlang_cplus;
-      break;
-    case language_java:
-      lang = vlang_java;
-      break;
-    case language_ada:
-      lang = vlang_ada;
-      break;
-    }
-
-  return lang;
-}
-
 /* Return the number of children for a given variable.
    The result of this function is defined by the language
    implementation.  The number of children returned by this function