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Sema: @intToEnum error msg includes a "declared here" hint

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This commit is contained in:
Andrew Kelley 2021-04-07 21:04:55 -07:00
parent a62e19ec8e
commit b67378fb08
2 changed files with 45 additions and 3 deletions
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20
src/Sema.zig
View File

@ -1983,9 +1983,23 @@ fn zirIntToEnum(sema: *Sema, block: *Scope.Block, inst: zir.Inst.Index) InnerErr
if (try sema.resolveDefinedValue(block, operand_src, operand)) |int_val| {
if (!dest_ty.enumHasInt(int_val, target)) {
return mod.fail(&block.base, src, "enum '{}' has no tag with value {}", .{
dest_ty, int_val,
});
const msg = msg: {
const msg = try mod.errMsg(
&block.base,
src,
"enum '{}' has no tag with value {}",
.{ dest_ty, int_val },
);
errdefer msg.destroy(sema.gpa);
try mod.errNoteNonLazy(
dest_ty.declSrcLoc(),
msg,
"enum declared here",
.{},
);
break :msg msg;
};
return mod.failWithOwnedErrorMsg(&block.base, msg);
}
return mod.constInst(arena, src, .{
.ty = dest_ty,

28
test/stage2/cbe.zig
View File

@ -674,6 +674,34 @@ pub fn addCases(ctx: *TestContext) !void {
":1:28: error: duplicate enum tag",
":1:22: note: other tag here",
});
case.addError(
\\export fn foo() void {
\\ const a = true;
\\ const b = @enumToInt(a);
\\}
, &.{
":3:26: error: expected enum or tagged union, found bool",
});
case.addError(
\\export fn foo() void {
\\ const a = 1;
\\ const b = @intToEnum(bool, a);
\\}
, &.{
":3:26: error: expected enum, found bool",
});
case.addError(
\\const E = enum { a, b, c };
\\export fn foo() void {
\\ const b = @intToEnum(E, 3);
\\}
, &.{
":3:15: error: enum 'E' has no tag with value 3",
":1:11: note: enum declared here",
});
}
ctx.c("empty start function", linux_x64,