46 lines
1.0 KiB
C++
46 lines
1.0 KiB
C++
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// RUN: %clang_cc1 -std=c++2a -emit-pch %s -o %t
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// RUN: %clang_cc1 -std=c++2a -include-pch %t -verify %s
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// RUN: %clang_cc1 -std=c++2a -emit-pch -fpch-instantiate-templates %s -o %t
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// RUN: %clang_cc1 -std=c++2a -include-pch %t -verify %s
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// expected-no-diagnostics
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#ifndef HEADER
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#define HEADER
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auto l1 = []<int I>() constexpr -> int {
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return I;
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};
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auto l2 = []<auto I>() constexpr -> decltype(I) {
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return I;
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};
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auto l3 = []<class T>(auto i) constexpr -> T {
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return T(i);
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};
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auto l4 = []<template<class> class T, class U>(T<U>, auto i) constexpr -> U {
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return U(i);
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};
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#else /*included pch*/
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static_assert(l1.operator()<5>() == 5);
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static_assert(l1.operator()<6>() == 6);
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static_assert(l2.operator()<7>() == 7);
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static_assert(l2.operator()<nullptr>() == nullptr);
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static_assert(l3.operator()<int>(8.4) == 8);
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static_assert(l3.operator()<int>(9.9) == 9);
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template<typename T>
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struct DummyTemplate { };
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static_assert(l4(DummyTemplate<float>(), 12) == 12.0);
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static_assert(l4(DummyTemplate<int>(), 19.8) == 19);
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#endif // HEADER
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