| author |  Andrew Kelley <andrew@ziglang.org> 2016-04-06 14:08:23-07:00 |
| committer | Andrew Kelley <andrew@ziglang.org> 2016-04-06 14:09:27-07:00 |
| log | 7bb67b1fd0ca56a04778083f1a01583d839be9b1 |
| tree | 2eadc6f2c7ce6cb3d2adca58c6dbcd16ef05ee2a |
| parent | 22ef416d4de6e37fbe8428351c4043e5acc3c818 |
ability to compare function pointers at compile time
2 files changed, 19 insertions(+), 0 deletions(-)
src
test
src/analyze.cpp+10
| ... | ... | @@ -2902,6 +2902,16 @@ static TypeTableEntry *analyze_bool_bin_op_expr(CodeGen *g, ImportTableEntry *im |
| 2902 | 2902 | } else if (resolved_type->id == TypeTableEntryIdPureError) { |
| 2903 | 2903 | bool are_equal = op1_val->data.x_err.err == op2_val->data.x_err.err; |
| 2904 | 2904 | |
| 2905 | if (bin_op_type == BinOpTypeCmpEq) { | |
| 2906 | answer = are_equal; | |
| 2907 | } else if (bin_op_type == BinOpTypeCmpNotEq) { | |
| 2908 | answer = !are_equal; | |
| 2909 | } else { | |
| 2910 | zig_unreachable(); | |
| 2911 | } | |
| 2912 | } else if (resolved_type->id == TypeTableEntryIdFn) { | |
| 2913 | bool are_equal = (op1_val->data.x_fn == op2_val->data.x_fn); | |
| 2914 | ||
| 2905 | 2915 | if (bin_op_type == BinOpTypeCmpEq) { |
| 2906 | 2916 | answer = are_equal; |
| 2907 | 2917 | } else if (bin_op_type == BinOpTypeCmpNotEq) { |
test/self_hosted.zig+9
| ... | ... | @@ -522,6 +522,15 @@ fn max(T: type)(a: T, b: T) -> T { |
| 522 | 522 | } |
| 523 | 523 | |
| 524 | 524 | |
| 525 | #attribute("test") | |
| 526 | fn constant_equal_function_pointers() { | |
| 527 | const alias = empty_fn; | |
| 528 | assert(@const_eval(empty_fn == alias)); | |
| 529 | } | |
| 530 | ||
| 531 | fn empty_fn() {} | |
| 532 | ||
| 533 | ||
| 525 | 534 | fn assert(b: bool) { |
| 526 | 535 | if (!b) unreachable{} |
| 527 | 536 | } |