| Daniel Dunbar | 8fbe78f | 2009-12-15 20:14:24 +0000 | [diff] [blame] | 1 | // RUN: %clang_cc1 %s -E | grep 'pre: 1 1 X' |
| 2 | // RUN: %clang_cc1 %s -E | grep 'nopre: 1A(X)' |
| Chris Lattner | ab30c03 | 2006-07-19 05:48:15 +0000 | [diff] [blame] | 3 | |
| 4 | /* Preexpansion of argument. */ |
| Chris Lattner | 1e17abb | 2006-07-16 18:15:05 +0000 | [diff] [blame] | 5 | #define A(X) 1 X |
| Chris Lattner | ab30c03 | 2006-07-19 05:48:15 +0000 | [diff] [blame] | 6 | pre: A(A(X)) |
| 7 | |
| 8 | /* The ## operator disables preexpansion. */ |
| 9 | #undef A |
| 10 | #define A(X) 1 ## X |
| 11 | nopre: A(A(X)) |
| Chris Lattner | 1e17abb | 2006-07-16 18:15:05 +0000 | [diff] [blame] | 12 | |