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 // RUN: %clang_cc1 -std=c++2a -emit-pch -fpch-instantiate-templates %s -o %t 5 // RUN: %clang_cc1 -std=c++2a -include-pch %t -verify %s 6 7 // expected-no-diagnostics 8 9 #ifndef HEADER 10 #define HEADER 11 12 auto l1 = []<int I>() constexpr -> int { 13 return I; 14 }; 15 16 auto l2 = []<auto I>() constexpr -> decltype(I) { 17 return I; 18 }; 19 20 auto l3 = []<class T>(auto i) constexpr -> T { 21 return T(i); 22 }; 23 24 auto l4 = []<template<class> class T, class U>(T<U>, auto i) constexpr -> U { 25 return U(i); 26 }; 27 28 #else /*included pch*/ 29 30 static_assert(l1.operator()<5>() == 5); 31 static_assert(l1.operator()<6>() == 6); 32 33 static_assert(l2.operator()<7>() == 7); 34 static_assert(l2.operator()<nullptr>() == nullptr); 35 36 static_assert(l3.operator()<int>(8.4) == 8); 37 static_assert(l3.operator()<int>(9.9) == 9); 38 39 template<typename T> 40 struct DummyTemplate { }; 41 42 static_assert(l4(DummyTemplate<float>(), 12) == 12.0); 43 static_assert(l4(DummyTemplate<int>(), 19.8) == 19); 44 45 #endif // HEADER 46