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add compile error test for invalid enum literal implicit cast

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See #683
This commit is contained in:
Andrew Kelley 2019-03-24 18:51:24 -04:00
parent da9d8a6ecf
commit 3306e43984
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GPG Key ID: 7C5F548F728501A9
2 changed files with 17 additions and 1 deletions
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4
src/ir.cpp
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@ -11601,8 +11601,10 @@ static IrInstruction *ir_analyze_cast(IrAnalyze *ira, IrInstruction *source_inst
TypeEnumField *field = find_enum_type_field(wanted_type, value->value.data.x_enum_literal);
if (field == nullptr) {
ir_add_error(ira, source_instr, buf_sprintf("enum '%s' has no field named '%s'",
ErrorMsg *msg = ir_add_error(ira, source_instr, buf_sprintf("enum '%s' has no field named '%s'",
buf_ptr(&wanted_type->name), buf_ptr(value->value.data.x_enum_literal)));
add_error_note(ira->codegen, msg, wanted_type->data.enumeration.decl_node,
buf_sprintf("'%s' declared here", buf_ptr(&wanted_type->name)));
return ira->codegen->invalid_instruction;
}
IrInstruction *result = ir_const(ira, source_instr, wanted_type);

14
test/compile_errors.zig
View File

@ -2,6 +2,20 @@ const tests = @import("tests.zig");
const builtin = @import("builtin");
pub fn addCases(cases: *tests.CompileErrorContext) void {
cases.add(
"cast enum literal to enum but it doesn't match",
\\const Foo = enum {
\\ a,
\\ b,
\\};
\\export fn entry() void {
\\ const x: Foo = .c;
\\}
,
"tmp.zig:6:20: error: enum 'Foo' has no field named 'c'",
"tmp.zig:1:13: note: 'Foo' declared here",
);
cases.add(
"discarding error value",
\\export fn entry() void {