diff options
Diffstat (limited to 'gcc/testsuite/g++.dg/cpp0x/constexpr-array-ptr5.C')
-rw-r--r-- | gcc/testsuite/g++.dg/cpp0x/constexpr-array-ptr5.C | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/gcc/testsuite/g++.dg/cpp0x/constexpr-array-ptr5.C b/gcc/testsuite/g++.dg/cpp0x/constexpr-array-ptr5.C new file mode 100644 index 000000000..d58f254f6 --- /dev/null +++ b/gcc/testsuite/g++.dg/cpp0x/constexpr-array-ptr5.C @@ -0,0 +1,32 @@ +// { dg-options -std=c++0x } + +template<class T> +constexpr T do_last(T* x, int n) { + return x[n - 1]; // +} + +template<class T, int N> +constexpr T last(T (&x)[N]) { + return do_last(x, N); +} + +constexpr bool is_negative(int x) { return x < 0; } + +template<class T> +struct IsNegative { + constexpr bool operator()(const T& x) { + return x < T(0); + } +}; + +template<class T, int N, class Pred> +constexpr bool has_neg(T (&x)[N], Pred p) { + return p(last(x)); // Line 22 +} + +constexpr int a[] = {1, -2}; + +constexpr auto answer1 = has_neg(a, IsNegative<int>{}); // Line 27 +constexpr auto answer2 = has_neg(a, is_negative); + +static_assert(answer2 == answer1, "Error"); |