| author |  LemonBoy <thatlemon@gmail.com> 2020-03-21 18:33:54+01:00 |
| committer |  Andrew Kelley <andrew@ziglang.org> 2020-03-21 20:54:05-04:00 |
| log | dc79f181a56cad17f429bbb7fd176e49bf3d66da |
| tree | 4aa0c56887fb3f197b692d999c8a2771d984cca7 |
| parent | beea478acc2491289ec3e3bbdcec3b68f65d6e62 |
| signature |  Commit is signed but in an unrecognized format. |
ir: Disallow comparison between enum literal and untagged enum
Closes #47702 files changed, 20 insertions(+), 0 deletions(-)
src
src/ir.cpp+9
| ... | ... | @@ -16286,6 +16286,15 @@ static IrInstGen *ir_analyze_bin_op_cmp(IrAnalyze *ira, IrInstSrcBinOp *bin_op_i |
| 16286 | 16286 | IrInstGen *union_val = op1->value->type->id == ZigTypeIdUnion ? op1 : op2; |
| 16287 | 16287 | IrInstGen *enum_val = op1->value->type->id == ZigTypeIdUnion ? op2 : op1; |
| 16288 | 16288 | |
| 16289 | if (!is_tagged_union(union_val->value->type)) { | |
| 16290 | ErrorMsg *msg = ir_add_error_node(ira, source_node, | |
| 16291 | buf_sprintf("comparison of union and enum literal is only valid for tagged union types")); | |
| 16292 | add_error_note(ira->codegen, msg, union_val->value->type->data.unionation.decl_node, | |
| 16293 | buf_sprintf("type %s is not a tagged union", | |
| 16294 | buf_ptr(&union_val->value->type->name))); | |
| 16295 | return ira->codegen->invalid_inst_gen; | |
| 16296 | } | |
| 16297 | ||
| 16289 | 16298 | ZigType *tag_type = union_val->value->type->data.unionation.tag_type; |
| 16290 | 16299 | assert(tag_type != nullptr); |
| 16291 | 16300 |
test/compile_errors.zig+11
| ... | ... | @@ -14,6 +14,17 @@ pub fn addCases(cases: *tests.CompileErrorContext) void { |
| 14 | 14 | "tmp.zig:2:15: error: unused variable: 'a'", |
| 15 | 15 | }); |
| 16 | 16 | |
| 17 | cases.addTest("comparison of non-tagged union and enum literal", | |
| 18 | \\export fn entry() void { | |
| 19 | \\ const U = union { A: u32, B: u64 }; | |
| 20 | \\ var u = U{ .A = 42 }; | |
| 21 | \\ var ok = u == .A; | |
| 22 | \\} | |
| 23 | , &[_][]const u8{ | |
| 24 | "tmp.zig:4:16: error: comparison of union and enum literal is only valid for tagged union types", | |
| 25 | "tmp.zig:2:15: note: type U is not a tagged union", | |
| 26 | }); | |
| 27 | ||
| 17 | 28 | cases.addTest("shift on type with non-power-of-two size", |
| 18 | 29 | \\export fn entry() void { |
| 19 | 30 | \\ const S = struct { |