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| author | Ben Cheng <bccheng@google.com> | 2014-03-25 22:37:19 -0700 |
|---|---|---|
| committer | Ben Cheng <bccheng@google.com> | 2014-03-25 22:37:19 -0700 |
| commit | 1bc5aee63eb72b341f506ad058502cd0361f0d10 (patch) | |
| tree | c607e8252f3405424ff15bc2d00aa38dadbb2518 /gcc-4.9/gcc/testsuite/g++.dg/cpp0x/decltype42.C | |
| parent | 283a0bf58fcf333c58a2a92c3ebbc41fb9eb1fdb (diff) | |
| download | toolchain_gcc-1bc5aee63eb72b341f506ad058502cd0361f0d10.tar.gz toolchain_gcc-1bc5aee63eb72b341f506ad058502cd0361f0d10.tar.bz2 toolchain_gcc-1bc5aee63eb72b341f506ad058502cd0361f0d10.zip | |
Initial checkin of GCC 4.9.0 from trunk (r208799).
Change-Id: I48a3c08bb98542aa215912a75f03c0890e497dba
Diffstat (limited to 'gcc-4.9/gcc/testsuite/g++.dg/cpp0x/decltype42.C')
| -rw-r--r-- | gcc-4.9/gcc/testsuite/g++.dg/cpp0x/decltype42.C | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/gcc-4.9/gcc/testsuite/g++.dg/cpp0x/decltype42.C b/gcc-4.9/gcc/testsuite/g++.dg/cpp0x/decltype42.C new file mode 100644 index 000000000..6c1aa4364 --- /dev/null +++ b/gcc-4.9/gcc/testsuite/g++.dg/cpp0x/decltype42.C @@ -0,0 +1,31 @@ +// PR c++/50545 +// { dg-do compile { target c++11 } } + +template< class T > +T&& declval(); + +// #1 +template< class T > +auto f( int ) + -> decltype( int{ declval<T>() } ); + +// #2 +template< class > +void f( ... ); + + +#define STATIC_ASSERT( ... ) static_assert( __VA_ARGS__, #__VA_ARGS__ ) + +template< class T, class U > +struct is_same { + static constexpr bool value = false; +}; + +template< class T > +struct is_same<T, T> { + static constexpr bool value = true; +}; + + +STATIC_ASSERT( is_same< decltype( f<int>(0) ), int >::value ); // OK; f<int>(0) calls #1. +STATIC_ASSERT( is_same< decltype( f<int*>(0) ), void >::value ); // static assertion fails; f<int*>(0) should call #2, because int{ (int*)0 } is ill-formed, but calls #1. |