1 // RUN: %clang_cc1 -std=c++2a -emit-pch %s -o %t 2 // RUN: %clang_cc1 -std=c++2a -include-pch %t -verify %s 3 4 // expected-no-diagnostics 5 6 #ifndef HEADER 7 #define HEADER 8 9 auto l1 = []<int I>() constexpr -> int { 10 return I; 11 }; 12 13 auto l2 = []<auto I>() constexpr -> decltype(I) { 14 return I; 15 }; 16 17 auto l3 = []<class T>(auto i) constexpr -> T { 18 return T(i); 19 }; 20 21 auto l4 = []<template<class> class T, class U>(T<U>, auto i) constexpr -> U { 22 return U(i); 23 }; 24 25 #else /*included pch*/ 26 27 static_assert(l1.operator()<5>() == 5); 28 static_assert(l1.operator()<6>() == 6); 29 30 static_assert(l2.operator()<7>() == 7); 31 static_assert(l2.operator()<nullptr>() == nullptr); 32 33 static_assert(l3.operator()<int>(8.4) == 8); 34 static_assert(l3.operator()<int>(9.9) == 9); 35 36 template<typename T> 37 struct DummyTemplate { }; 38 39 static_assert(l4(DummyTemplate<float>(), 12) == 12.0); 40 static_assert(l4(DummyTemplate<int>(), 19.8) == 19); 41 42 #endif // HEADER 43