| // RUN: %clang_cc1 -std=c++17 %s -verify |
| // RUN: %clang_cc1 -std=c++20 %s -verify |
| // RUN: %clang_cc1 -std=c++20 %s -verify -Wc++17-compat -DCOMPAT |
| // |
| // RUN: %clang_cc1 -std=c++17 %s -E -o - | FileCheck %s --check-prefix=CXX17 |
| // RUN: %clang_cc1 -std=c++20 %s -E -o - | FileCheck %s --check-prefix=CXX20 |
| |
| namespace N { |
| |
| struct A {}; |
| void operator<=(A, A); |
| #if __cplusplus > 201703L |
| void operator<=>(A, A); |
| #ifdef COMPAT |
| // expected-warning@-2 {{'<=>' operator is incompatible with C++ standards before C++20}} |
| #endif |
| #endif |
| |
| template<auto> struct X {}; |
| X<operator<=> |
| #if __cplusplus <= 201703L |
| // expected-warning@-2 {{'<=>' is a single token in C++20; add a space to avoid a change in behavior}} |
| #else |
| > |
| #endif |
| #ifdef COMPAT |
| // expected-warning@-7 {{'<=>' operator is incompatible with C++ standards before C++20}} |
| #endif |
| x; |
| } |
| |
| // <=> can be formed by pasting other comparison operators. |
| #if __cplusplus > 201703L |
| #define STR(x) #x |
| #define STR_EXPANDED(x) STR(x) |
| #define PASTE(x, y) x ## y |
| constexpr char a[] = STR_EXPANDED(PASTE(<, =>)); |
| constexpr char b[] = STR_EXPANDED(PASTE(<=, >)); |
| static_assert(__builtin_strcmp(a, "<=>") == 0); |
| static_assert(__builtin_strcmp(b, "<=>") == 0); |
| #endif |
| |
| // -E must not accidentally form a <=> token. |
| |
| // CXX17: preprocess1: < => |
| // CXX17: preprocess2: <=> |
| // CXX17: preprocess3: < => |
| // CXX17: preprocess4: <=>= |
| // CXX17: preprocess5: <=>> |
| // CXX17: preprocess6: <=>>= |
| // CXX17: preprocess7: <=> |
| // CXX17: preprocess8: <=>= |
| // |
| // CXX20: preprocess1: < => |
| // CXX20: preprocess2: <= > |
| // CXX20: preprocess3: < => |
| // CXX20: preprocess4: <= >= |
| // CXX20: preprocess5: <= >> |
| // CXX20: preprocess6: <= >>= |
| // CXX20: preprocess7: <=> |
| // CXX20: preprocess8: <=>= |
| |
| #define ID(x) x |
| [[some_vendor::some_attribute( // expected-warning {{unknown attribute}} |
| preprocess1: ID(<)ID(=>), |
| preprocess2: ID(<=)ID(>), |
| preprocess3: ID(<)ID(=)ID(>), |
| preprocess4: ID(<=)ID(>=), |
| preprocess5: ID(<=)ID(>>), |
| preprocess6: ID(<=)ID(>>=), |
| preprocess7: ID(<=>) // expected-warning 0-1{{'<=>'}} |
| preprocess8: ID(<=>=) // expected-warning 0-1{{'<=>'}} |
| )]]; |
