[PATCH v6 01/11] Add definitions for rvalue reference types

Keith Seitz
2017-03-10T20:04:49Z

This patch introduces preliminal definitions regarding C++11 rvalue references
to the gdb type system. In addition to an enum type_code entry, a field in
struct type and an accessor macro for that which are created similarly to the
lvalue references counterparts, we also introduce a TYPE_REFERENCE convenience
macro used to check for both kinds of references simultaneously as they are
equivalent in many contexts.

There are no changes to this patch from v5.

gdb/Changelog

PR gdb/14441
From Artemiy Volkov <artemiyv@acm.org>
* gdbtypes.h (enum type_code) <TYPE_CODE_RVALUE_REF>: New constant.
(TYPE_IS_REFERENCE): New macro.
(struct type): Add rvalue_reference_type field.
(TYPE_RVALUE_REFERENCE_TYPE): New macro.
---
gdb/ChangeLog | 9 +++++++++
gdb/gdbtypes.h | 12 ++++++++++++
2 files changed, 21 insertions(+)

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index e4c4432..7f2e2e5 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,12 @@
+2017-MM-DD Keith Seitz <keiths@redhat.com>
+
+ PR gdb/14441
+ From Artemiy Volkov <artemiyv@acm.org>
+ * gdbtypes.h (enum type_code) <TYPE_CODE_RVALUE_REF>: New constant.
+ (TYPE_IS_REFERENCE): New macro.
+ (struct type): Add rvalue_reference_type field.
+ (TYPE_RVALUE_REFERENCE_TYPE): New macro.
+
2017-03-10 Keith Seitz <keiths@redhat.com>

PR c++/8218
diff --git a/gdb/gdbtypes.h b/gdb/gdbtypes.h
index e094ece..7d107fa 100644
--- a/gdb/gdbtypes.h
+++ b/gdb/gdbtypes.h
@@ -160,6 +160,8 @@ enum type_code

TYPE_CODE_REF, /**< C++ Reference types */

+ TYPE_CODE_RVALUE_REF, /**< C++ rvalue reference types */
+
TYPE_CODE_CHAR, /**< *real* character type */

/* * Boolean type. 0 is false, 1 is true, and other values are
@@ -335,6 +337,11 @@ enum type_instance_flag_value
#define TYPE_ATOMIC(t) \
(TYPE_INSTANCE_FLAGS (t) & TYPE_INSTANCE_FLAG_ATOMIC)

+/* * True if this type represents either an lvalue or lvalue reference type. */
+
+#define TYPE_IS_REFERENCE(t) \
+ (TYPE_CODE (t) == TYPE_CODE_REF || TYPE_CODE (t) == TYPE_CODE_RVALUE_REF)
+
/* * Instruction-space delimited type. This is for Harvard architectures
which have separate instruction and data address spaces (and perhaps
others).
@@ -740,6 +747,10 @@ struct type

struct type *reference_type;

+ /* * A C++ rvalue reference type added in C++11. */
+
+ struct type *rvalue_reference_type;
+
/* * Variant chain. This points to a type that differs from this
one only in qualifiers and length. Currently, the possible
qualifiers are const, volatile, code-space, data-space, and
@@ -1196,6 +1207,7 @@ extern void allocate_gnat_aux_type (struct type *);
#define TYPE_TARGET_TYPE(thistype) TYPE_MAIN_TYPE(thistype)->target_type
#define TYPE_POINTER_TYPE(thistype) (thistype)->pointer_type
#define TYPE_REFERENCE_TYPE(thistype) (thistype)->reference_type
+#define TYPE_RVALUE_REFERENCE_TYPE(thistype) (thistype)->rvalue_reference_type
#define TYPE_CHAIN(thistype) (thistype)->chain
/* * Note that if thistype is a TYPEDEF type, you have to call check_typedef.
But check_typedef does set the TYPE_LENGTH of the TYPEDEF type,
--
2.1.0