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type_traits (__make_unsigned_selector<>): Consider enums of size smaller than short.

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* include/std/type_traits (__make_unsigned_selector<>): Consider
	enums of size smaller than short.
	(__make_signed_selector<>): Likewise.
	* testsuite/20_util/make_signed/requirements/typedefs_neg.cc:
	Adjust line numbers.
	* testsuite/20_util/make_usigned/requirements/typedefs_neg.cc:
	Adjust line numbers.
	* testsuite/20_util/make_signed/requirements/typedefs-2.cc:
	Ensure test_enum is the same size as short.
	* testsuite/20_util/make_unsigned/requirements/typedefs-2.cc:
	Ensure test_enum is the same size as short.

From-SVN: r139875
This commit is contained in:
Mark Mitchell 2008-09-01 23:24:09 +00:00 • committed by Mark Mitchell
parent 26272ba2c4
commit a023046841
6 changed files with 39 additions and 17 deletions
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14
libstdc++-v3/ChangeLog
View file

@ -1,3 +1,17 @@
2008-09-01 Mark Mitchell <mark@codesourcery.com>
* include/std/type_traits (__make_unsigned_selector<>): Consider
enums of size smaller than short.
(__make_signed_selector<>): Likewise.
* testsuite/20_util/make_signed/requirements/typedefs_neg.cc:
Adjust line numbers.
* testsuite/20_util/make_usigned/requirements/typedefs_neg.cc:
Adjust line numbers.
* testsuite/20_util/make_signed/requirements/typedefs-2.cc:
Ensure test_enum is the same size as short.
* testsuite/20_util/make_unsigned/requirements/typedefs-2.cc:
Ensure test_enum is the same size as short.
2008-08-31 Aaron W. LaFramboise <aaronavay62@aaronwl.com>
* acinclude.m4 <enable_symvers>: Don't use symvers on Windows.

30
libstdc++-v3/include/std/type_traits
View file

@ -455,15 +455,18 @@ namespace std
struct __make_unsigned_selector<_Tp, false, true>
{
private:
// GNU enums start with sizeof short.
typedef unsigned short __smallest;
static const bool __b1 = sizeof(_Tp) <= sizeof(__smallest);
// With -fshort-enums, an enum may be as small as a char.
typedef unsigned char __smallest;
static const bool __b0 = sizeof(_Tp) <= sizeof(__smallest);
static const bool __b1 = sizeof(_Tp) <= sizeof(unsigned short);
static const bool __b2 = sizeof(_Tp) <= sizeof(unsigned int);
typedef conditional<__b2, unsigned int, unsigned long> __cond;
typedef typename __cond::type __cond_type;
typedef conditional<__b2, unsigned int, unsigned long> __cond2;
typedef typename __cond2::type __cond2_type;
typedef conditional<__b1, unsigned short, __cond2_type> __cond1;
typedef typename __cond1::type __cond1_type;
public:
typedef typename conditional<__b1, __smallest, __cond_type>::type __type;
typedef typename conditional<__b0, __smallest, __cond1_type>::type __type;
};
// Given an integral/enum type, return the corresponding unsigned
@ -530,15 +533,18 @@ namespace std
struct __make_signed_selector<_Tp, false, true>
{
private:
// GNU enums start with sizeof short.
typedef signed short __smallest;
static const bool __b1 = sizeof(_Tp) <= sizeof(__smallest);
// With -fshort-enums, an enum may be as small as a char.
typedef signed char __smallest;
static const bool __b0 = sizeof(_Tp) <= sizeof(__smallest);
static const bool __b1 = sizeof(_Tp) <= sizeof(signed short);
static const bool __b2 = sizeof(_Tp) <= sizeof(signed int);
typedef conditional<__b2, signed int, signed long> __cond;
typedef typename __cond::type __cond_type;
typedef conditional<__b2, signed int, signed long> __cond2;
typedef typename __cond2::type __cond2_type;
typedef conditional<__b1, signed short, __cond2_type> __cond1;
typedef typename __cond1::type __cond1_type;
public:
typedef typename conditional<__b1, __smallest, __cond_type>::type __type;
typedef typename conditional<__b0, __smallest, __cond1_type>::type __type;
};
// Given an integral/enum type, return the corresponding signed

3
libstdc++-v3/testsuite/20_util/make_signed/requirements/typedefs-2.cc
View file

@ -24,7 +24,8 @@
#include <type_traits>
#include <testsuite_hooks.h>
enum test_enum { first_selection };
// Ensure that this enum has "short" as its underlying type.
enum test_enum { first_selection = ((unsigned char)-1) + 1 };
void test01()
{

4
libstdc++-v3/testsuite/20_util/make_signed/requirements/typedefs_neg.cc
View file

@ -49,8 +49,8 @@ void test01()
// { dg-error "instantiated from here" "" { target *-*-* } 41 }
// { dg-error "instantiated from here" "" { target *-*-* } 43 }
// { dg-error "invalid use of incomplete type" "" { target *-*-* } 549 }
// { dg-error "declaration of" "" { target *-*-* } 515 }
// { dg-error "invalid use of incomplete type" "" { target *-*-* } 555 }
// { dg-error "declaration of" "" { target *-*-* } 518 }
// { dg-excess-errors "At global scope" }
// { dg-excess-errors "In instantiation of" }

3
libstdc++-v3/testsuite/20_util/make_unsigned/requirements/typedefs-2.cc
View file

@ -24,7 +24,8 @@
#include <type_traits>
#include <testsuite_hooks.h>
enum test_enum { first_selection };
// Ensure that this enum has "short" as its underlying type.
enum test_enum { first_selection = ((unsigned char)-1) + 1 };
void test01()
{

2
libstdc++-v3/testsuite/20_util/make_unsigned/requirements/typedefs_neg.cc
View file

@ -49,7 +49,7 @@ void test01()
// { dg-error "instantiated from here" "" { target *-*-* } 41 }
// { dg-error "instantiated from here" "" { target *-*-* } 43 }
// { dg-error "invalid use of incomplete type" "" { target *-*-* } 474 }
// { dg-error "invalid use of incomplete type" "" { target *-*-* } 477 }
// { dg-error "declaration of" "" { target *-*-* } 440 }
// { dg-excess-errors "At global scope" }