Commit 943176bbfc
Changed files (2)
src
test
cases
compile_errors
src/Sema.zig
@@ -5428,6 +5428,9 @@ fn zirValidateDestructure(sema: *Sema, block: *Block, inst: Zir.Inst.Index) Comp
const msg = try sema.errMsg(src, "type '{}' cannot be destructured", .{operand_ty.fmt(pt)});
errdefer msg.destroy(sema.gpa);
try sema.errNote(destructure_src, msg, "result destructured here", .{});
+ if (operand_ty.zigTypeTag(pt.zcu) == .error_union) {
+ try sema.errNote(src, msg, "consider using 'try', 'catch', or 'if'", .{});
+ }
break :msg msg;
});
}
test/cases/compile_errors/destructure_error_union.zig
@@ -0,0 +1,15 @@
+pub export fn entry() void {
+ const Foo = struct { u8, u8 };
+ const foo: anyerror!Foo = error.Failure;
+ const bar, const baz = foo;
+ _ = bar;
+ _ = baz;
+}
+
+// error
+// backend=stage2
+// target=native
+//
+// :4:28: error: type 'anyerror!tmp.entry.Foo' cannot be destructured
+// :4:26: note: result destructured here
+// :4:28: note: consider using 'try', 'catch', or 'if'