clang/test/Lexer/hexfloat.cpp

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