|  | // RUN: %clang_cc1 -std=c++98 -fsyntax-only -verify -pedantic %s | 
|  | // RUN: %clang_cc1 -std=c++11 -fsyntax-only -verify -pedantic %s | 
|  | // RUN: %clang_cc1 -std=c++14 -fsyntax-only -verify -pedantic %s | 
|  | // RUN: %clang_cc1 -std=c++17 -fsyntax-only -verify -pedantic %s | 
|  | double e = 0x.p0; // expected-error-re {{hexadecimal floating {{constant|literal}} requires a significand}} | 
|  |  | 
|  | float f = 0x1p+1; | 
|  | double d = 0x.2p2; | 
|  | float g = 0x1.2p2; | 
|  | double h = 0x1.p2; | 
|  | #if __cplusplus <= 201402L | 
|  | // expected-warning@-5 {{hexadecimal floating literals are a C++17 feature}} | 
|  | // expected-warning@-5 {{hexadecimal floating literals are a C++17 feature}} | 
|  | // expected-warning@-5 {{hexadecimal floating literals are a C++17 feature}} | 
|  | // expected-warning@-5 {{hexadecimal floating literals are a C++17 feature}} | 
|  | #endif | 
|  |  | 
|  | // PR12717: In order to minimally diverge from the C++ standard, we do not lex | 
|  | // 'p[+-]' as part of a pp-number unless the token starts 0x and doesn't contain | 
|  | // an underscore. | 
|  | double i = 0p+3; // expected-error {{invalid suffix 'p' on integer constant}} | 
|  | #define PREFIX(x) foo ## x | 
|  | double foo0p = 1, j = PREFIX(0p+3); // ok | 
|  | double k = 0x42_amp+3; | 
|  | #if __cplusplus > 201402L | 
|  | // expected-error@-2 {{no matching literal operator for call to 'operator""_amp+3'}} | 
|  | #elif __cplusplus >= 201103L | 
|  | // expected-error@-4 {{no matching literal operator for call to 'operator""_amp'}} | 
|  | #else | 
|  | // expected-error@-6 {{invalid suffix '_amp' on integer constant}} | 
|  | #endif |