[PATCH v3 06/11] [PR gdb/14441] gdb: print: implement correct printing of rvalue reference types and values

[Artemiy Volkov <artemiyv@acm.org>]

This patch provides the ability to print out names of rvalue reference types
and values of those types. This is done in full similarity to regular
references, and as with them, we don't print out "const" suffix because all
rvalue references are const.

gdb/ChangeLog:

2016-03-04  Artemiy Volkov  <artemiyv@acm.org>

    * c-typeprint.c (c_print_type, c_type_print_varspec_prefix)
    (c_type_print_modifier, c_type_print_varspec_suffix)
    (c_type_print_base): Support printing rvalue reference types.
    * c-valprint.c (c_val_print, c_value_print): Support printing
    rvalue reference values.
---
 gdb/c-typeprint.c | 10 ++++++----
 gdb/c-valprint.c  |  4 ++--
 2 files changed, 8 insertions(+), 6 deletions(-)

diff --git a/gdb/c-typeprint.c b/gdb/c-typeprint.c
index 6b9e6b3..fbfbac7 100644
--- a/gdb/c-typeprint.c
+++ b/gdb/c-typeprint.c
@@ -112,7 +112,7 @@ c_print_type (struct type *type,
 		      && !TYPE_VECTOR (type))
 		  || code == TYPE_CODE_MEMBERPTR
 		  || code == TYPE_CODE_METHODPTR
-		  || code == TYPE_CODE_REF)))
+		  || TYPE_IS_REFERENCE (type))))
 	fputs_filtered (" ", stream);
       need_post_space = (varstring != NULL && strcmp (varstring, "") != 0);
       c_type_print_varspec_prefix (type, stream, show, 0, need_post_space,
@@ -341,9 +341,10 @@ c_type_print_varspec_prefix (struct type *type,
       break;
 
     case TYPE_CODE_REF:
+    case TYPE_CODE_RVALUE_REF:
       c_type_print_varspec_prefix (TYPE_TARGET_TYPE (type),
 				   stream, show, 1, 0, flags);
-      fprintf_filtered (stream, "&");
+      fprintf_filtered (stream, TYPE_CODE(type) == TYPE_CODE_REF ? "&" : "&&");
       c_type_print_modifier (type, stream, 1, need_post_space);
       break;
 
@@ -409,8 +410,7 @@ c_type_print_modifier (struct type *type, struct ui_file *stream,
   /* We don't print `const' qualifiers for references --- since all
      operators affect the thing referenced, not the reference itself,
      every reference is `const'.  */
-  if (TYPE_CONST (type)
-      && TYPE_CODE (type) != TYPE_CODE_REF)
+  if (TYPE_CONST (type) && !TYPE_IS_REFERENCE (type))
     {
       if (need_pre_space)
 	fprintf_filtered (stream, " ");
@@ -725,6 +725,7 @@ c_type_print_varspec_suffix (struct type *type,
 
     case TYPE_CODE_PTR:
     case TYPE_CODE_REF:
+    case TYPE_CODE_RVALUE_REF:
       c_type_print_varspec_suffix (TYPE_TARGET_TYPE (type), stream,
 				   show, 1, 0, flags);
       break;
@@ -892,6 +893,7 @@ c_type_print_base (struct type *type, struct ui_file *stream,
     case TYPE_CODE_PTR:
     case TYPE_CODE_MEMBERPTR:
     case TYPE_CODE_REF:
+    case TYPE_CODE_RVALUE_REF:
     case TYPE_CODE_FUNC:
     case TYPE_CODE_METHOD:
     case TYPE_CODE_METHODPTR:
diff --git a/gdb/c-valprint.c b/gdb/c-valprint.c
index a1f5db6..e43783f 100644
--- a/gdb/c-valprint.c
+++ b/gdb/c-valprint.c
@@ -538,6 +538,7 @@ c_val_print (struct type *type, const gdb_byte *valaddr,
       break;
 
     case TYPE_CODE_REF:
+    case TYPE_CODE_RVALUE_REF:
     case TYPE_CODE_ENUM:
     case TYPE_CODE_FLAGS:
     case TYPE_CODE_FUNC:
@@ -583,8 +584,7 @@ c_value_print (struct value *val, struct ui_file *stream,
   val_type = value_type (val);
   type = check_typedef (val_type);
 
-  if (TYPE_CODE (type) == TYPE_CODE_PTR
-      || TYPE_CODE (type) == TYPE_CODE_REF)
+  if (TYPE_CODE (type) == TYPE_CODE_PTR || TYPE_IS_REFERENCE (type))
     {
       /* Hack:  remove (char *) for char strings.  Their
          type is indicated by the quoted string anyway.
-- 
2.7.2