Finish constification of varobj interface

This completes the constification of the struct varobj pointers in the
lang_varobj_ops interface partially done in
b09e2c591f9221d865bfe8425990a6bf9fab24e3. As suggested by Pedro,
varobj_get_path_expr casts away the const to assign the "mutable" struct
member.

gdb/ChangeLog:

	* ada-varobj.c (ada_name_of_child): Constify parent.
	(ada_path_expr_of_child): Same.
	(ada_value_of_child): Same.
	(ada_type_of_child): Same.
	* c-varobj.c (c_is_path_expr_parent): Same.
	(c_describe_child): Same.
	(c_name_of_child): Same.
	(c_value_of_child): Same.
	(c_type_of_child): Same.
	(cplus_number_of_children): Same.
	(cplus_describe_child): Constify var.
	(cplus_name_of_child): Constify parent.
	(cplus_value_of_child): Same.
	(cplus_type_of_child): Same.
	* jv-varobj.c (java_name_of_child): Same.
	(java_value_of_child): Same.
	(java_type_of_child): Same.
	* varobj.c (value_of_child): Same.
	(varobj_default_is_path_expr_parent): Constify var, parent and return
	value.
	(varobj_get_path_expr): Constify var, modify path_expr through
	mutable_var.
	(install_new_value): Constify parent.
	(value_of_child): Constify parent.
	* varobj.h (struct varobj): Constify parent.
	(struct lang_varobj_ops): Constify name_of_child, value_of_child and
	type_of_child.
	(varobj_get_path_expr): Constify var.
	(varobj_get_path_expr_parent): Constify var and return value.

1 files changed, 4 insertions, 4 deletions

diff --git a/gdb/ada-varobj.c b/gdb/ada-varobj.c
index 7407af4..83d0707 100644
--- a/gdb/ada-varobj.c
+++ b/gdb/ada-varobj.c
@@ -918,7 +918,7 @@ ada_name_of_variable (const struct varobj *parent)
 }
 
 static char *
-ada_name_of_child (struct varobj *parent, int index)
+ada_name_of_child (const struct varobj *parent, int index)
 {
   return ada_varobj_get_name_of_child (parent->value, parent->type,
 				       parent->name, index);
@@ -927,7 +927,7 @@ ada_name_of_child (struct varobj *parent, int index)
 static char*
 ada_path_expr_of_child (const struct varobj *child)
 {
-  struct varobj *parent = child->parent;
+  const struct varobj *parent = child->parent;
   const char *parent_path_expr = varobj_get_path_expr (parent);
 
   return ada_varobj_get_path_expr_of_child (parent->value,
@@ -938,14 +938,14 @@ ada_path_expr_of_child (const struct varobj *child)
 }
 
 static struct value *
-ada_value_of_child (struct varobj *parent, int index)
+ada_value_of_child (const struct varobj *parent, int index)
 {
   return ada_varobj_get_value_of_child (parent->value, parent->type,
 					parent->name, index);
 }
 
 static struct type *
-ada_type_of_child (struct varobj *parent, int index)
+ada_type_of_child (const struct varobj *parent, int index)
 {
   return ada_varobj_get_type_of_child (parent->value, parent->type,
 				       index);