|  | // RUN: %clang_cc1 -std=c++1y %s -verify | 
|  |  | 
|  | static_assert(0b1001 == 9, ""); | 
|  |  | 
|  | using I = int; | 
|  | using I = decltype(0b101001); | 
|  | using ULL = unsigned long long; | 
|  | using ULL = decltype(0b10101001ULL); | 
|  |  | 
|  | constexpr unsigned long long operator""_foo(unsigned long long n) { | 
|  | return n * 2; | 
|  | } | 
|  | static_assert(0b10001111_foo == 286, ""); | 
|  |  | 
|  | int k1 = 0b1234; // expected-error {{invalid digit '2' in binary constant}} | 
|  | // FIXME: If we ever need to support a standard suffix starting with [a-f], | 
|  | // we'll need to rework our binary literal parsing rules. | 
|  | int k2 = 0b10010f; // expected-error {{invalid digit 'f' in binary constant}} | 
|  | int k3 = 0b10010g; // expected-error {{invalid suffix 'g' on integer constant}} | 
|  | int k4 = 0b; // expected-error {{invalid digit 'b' in octal constant}} |