implement support for "enum class"

This adds support for the C++11 "enum class" feature.  This is
PR c++/15246.

I chose to use the existing TYPE_DECLARED_CLASS rather than introduce
a new type code.  This seemed both simple and clear to me.

I made overloading support for the new enum types strict.  This is how
it works in C++; and it didn't seem like an undue burden to keep this,
particularly because enum constants are printed symbolically by gdb.

Built and regtested on x86-64 Fedora 20.

2014-04-14  Tom Tromey  <tromey@redhat.com>

	PR c++/15246:
	* c-exp.y (type_aggregate_p): New function.
	(qualified_name, classify_inner_name): Use it.
	* c-typeprint.c (c_type_print_base): Handle TYPE_DECLARED_CLASS
	and TYPE_TARGET_TYPE of an enum type.
	* dwarf2read.c (read_enumeration_type): Set TYPE_DECLARED_CLASS on
	an enum type.
	(determine_prefix) <case DW_TAG_enumeration_type>: New case;
	handle TYPE_DECLARED_CLASS.
	* gdbtypes.c (rank_one_type): Handle TYPE_DECLARED_CLASS on enum
	types.
	* gdbtypes.h (TYPE_DECLARED_CLASS): Update comment.
	* valops.c (enum_constant_from_type): New function.
	(value_aggregate_elt): Use it.
	* cp-namespace.c (cp_lookup_nested_symbol): Handle
	TYPE_CODE_ENUM.

2014-04-14  Tom Tromey  <tromey@redhat.com>

	* gdb.cp/classes.exp (test_enums): Handle underlying type.
	* gdb.dwarf2/enum-type.exp: Add test for enum with underlying
	type.
	* gdb.cp/enum-class.exp: New file.
	* gdb.cp/enum-class.cc: New file.
This commit is contained in:
Tom Tromey
2014-03-27 12:24:27 -06:00
parent c848d64244
commit 3d567982ac
13 changed files with 243 additions and 14 deletions

View File

@@ -331,8 +331,10 @@ enum type_instance_flag_value
#define TYPE_OBJFILE(t) (TYPE_OBJFILE_OWNED(t)? TYPE_OWNER(t).objfile : NULL)
/* * True if this type was declared using the "class" keyword. This is
only valid for C++ structure types, and only used for displaying
the type. If false, the structure was declared as a "struct". */
only valid for C++ structure and enum types. If false, a structure
was declared as a "struct"; if true it was declared "class". For
enum types, this is true when "enum class" or "enum struct" was
used to declare the type.. */
#define TYPE_DECLARED_CLASS(t) (TYPE_MAIN_TYPE (t)->flag_declared_class)