| Richard Smith | 220dd33 | 2013-05-08 02:38:36 +0000 | [diff] [blame] | 1 | // RUN: %clang_cc1 -std=c++1y -fsyntax-only -verify %s -DMAX=1234 -fconstexpr-steps 1234 |
| 2 | // RUN: %clang_cc1 -std=c++1y -fsyntax-only -verify %s -DMAX=10 -fconstexpr-steps 10 |
| 3 | // RUN: %clang -std=c++1y -fsyntax-only -Xclang -verify %s -DMAX=12345 -fconstexpr-steps=12345 |
| 4 | |
| 5 | // This takes a total of n + 4 steps according to our current rules: |
| 6 | // - One for the compound-statement that is the function body |
| 7 | // - One for the 'for' statement |
| 8 | // - One for the 'int k = 0;' statement |
| 9 | // - One for each of the n evaluations of the compound-statement in the 'for' body |
| 10 | // - One for the 'return' statemnet |
| 11 | constexpr bool steps(int n) { |
| 12 | for (int k = 0; k != n; ++k) {} |
| 13 | return true; // expected-note {{step limit}} |
| 14 | } |
| 15 | |
| 16 | static_assert(steps((MAX - 4)), ""); // ok |
| 17 | static_assert(steps((MAX - 3)), ""); // expected-error {{constant}} expected-note{{call}} |