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author | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
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committer | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
commit | 554fd8c5195424bdbcabf5de30fdc183aba391bd (patch) | |
tree | 976dc5ab7fddf506dadce60ae936f43f58787092 /gcc/testsuite/g++.dg/cpp0x/constexpr-initlist.C | |
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Diffstat (limited to 'gcc/testsuite/g++.dg/cpp0x/constexpr-initlist.C')
-rw-r--r-- | gcc/testsuite/g++.dg/cpp0x/constexpr-initlist.C | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/gcc/testsuite/g++.dg/cpp0x/constexpr-initlist.C b/gcc/testsuite/g++.dg/cpp0x/constexpr-initlist.C new file mode 100644 index 000000000..6854e7341 --- /dev/null +++ b/gcc/testsuite/g++.dg/cpp0x/constexpr-initlist.C @@ -0,0 +1,65 @@ +// { dg-options -std=c++0x } +// { dg-do run } + +namespace xstd { + +typedef decltype(sizeof(char)) size_t; + +template<class E> +class initializer_list { +private: + size_t sz; + const E* start; + +public: + typedef E value_type; + typedef const E& reference; + typedef const E& const_reference; + typedef size_t size_type; + typedef const E* iterator; + typedef const E* const_iterator; + + constexpr initializer_list() : sz(), start(nullptr) {} + + template<size_t N> + constexpr initializer_list(const E(&array)[N]) : sz(N), start(array) {} + + constexpr size_t size() { return sz; } + + constexpr const E* begin() { return start; } + + constexpr const E* end() { return start + sz; } +}; + +template<class E, size_t N> +constexpr initializer_list<E> make_list(const E(&array)[N]) { + return initializer_list<E>(array); +} + +template<class E> +E min(initializer_list<E> list) +{ + // static_assert(list.size() > 0, "Invalid list"); + auto it = list.begin(); + E result = *it; + for (++it; it != list.end(); ++it) { + if (*it < result) { + result = *it; + } + } + return result; +} + +} + +constexpr int global_i[] = {2, 4, -5, 6, 10}; +constexpr xstd::initializer_list<int> list(global_i); +#define SA(X) static_assert(X, #X) +SA(list.size() == 5); +SA(list.begin()[2] == -5); +SA(list.end()[-1] == 10); + +int main() { + if (xstd::min(xstd::make_list(global_i)) != -5) + return 1; +} |