zig/test/cases/switch_prong_err_enum.zig
Jimmi Holst Christensen 378d3e4403
Solve the return type ambiguity (#1628)
Changed container and initializer syntax
* <container> { ... } -> <container> . { ... }
* <exrp> { ... } -> <expr> . { ...}
2018-10-15 09:51:15 -04:00

31 lines
631 B
Zig

const assert = @import("std").debug.assert;
var read_count: u64 = 0;
fn readOnce() error!u64 {
read_count += 1;
return read_count;
}
const FormValue = union(enum).{
Address: u64,
Other: bool,
};
fn doThing(form_id: u64) error!FormValue {
return switch (form_id) {
17 => FormValue.{ .Address = try readOnce() },
else => error.InvalidDebugInfo,
};
}
test "switch prong returns error enum" {
switch (doThing(17) catch unreachable) {
FormValue.Address => |payload| {
assert(payload == 1);
},
else => unreachable,
}
assert(read_count == 1);
}