zig/test/cases/switch_prong_implicit_cast.zig
Andrew Kelley 3671582c15 syntax: functions require return type. remove ->
The purpose of this is:

 * Only one way to do things
 * Changing a function with void return type to return a possible
   error becomes a 1 character change, subtly encouraging
   people to use errors.

See #632

Here are some imperfect sed commands for performing this update:

remove arrow:

```
sed -i 's/\(\bfn\b.*\)-> /\1/g' $(find . -name "*.zig")
```

add void:

```
sed -i 's/\(\bfn\b.*\))\s*{/\1) void {/g' $(find ../ -name "*.zig")
```

Some cleanup may be necessary, but this should do the bulk of the work.
2018-01-25 04:10:11 -05:00

25 lines
493 B
Zig

const assert = @import("std").debug.assert;
const FormValue = union(enum) {
One: void,
Two: bool,
};
error Whatever;
fn foo(id: u64) %FormValue {
return switch (id) {
2 => FormValue { .Two = true },
1 => FormValue { .One = {} },
else => return error.Whatever,
};
}
test "switch prong implicit cast" {
const result = switch (foo(2) catch unreachable) {
FormValue.One => false,
FormValue.Two => |x| x,
};
assert(result);
}