|  | // RUN: %clang_cc1 -Eonly -verify %s | 
|  |  | 
|  | #if 0 | 
|  | #if 1 | 
|  | #endif junk // shouldn't produce diagnostics | 
|  | #endif | 
|  |  | 
|  | #if 0 | 
|  | #endif junk // expected-warning{{extra tokens at end of #endif directive}} | 
|  |  | 
|  | #if 1 junk  // expected-error{{token is not a valid binary operator in a preprocessor subexpression}} | 
|  | #X          // shouldn't produce diagnostics (block #if condition not valid, so skipped) | 
|  | #else | 
|  | #X          // expected-error{{invalid preprocessing directive}} | 
|  | #endif | 
|  |  | 
|  | #if 0 | 
|  | // diagnostics should not be produced until final #endif | 
|  | #X | 
|  | #include | 
|  | #if 1 junk | 
|  | #else junk | 
|  | #endif junk | 
|  | #line -2 | 
|  | #error | 
|  | #warning | 
|  | #endif junk // expected-warning{{extra tokens at end of #endif directive}} |