0ad1239522
* @enumTagName renamed to @tagName and it works on enums and union-enums * Remove the EnumTag type. Now there is only enum and union, and the tag type of a union is always an enum. * unions support specifying the tag enum type, and they support inferring an enum tag type. * Enums no longer support field types but they do support setting the tag values. Likewise union-enums when inferring an enum tag type support setting the tag values. * It is now an error for enums and unions to have 0 fields. * switch statements support union-enums closes #618
25 lines
472 B
Zig
25 lines
472 B
Zig
const assert = @import("std").debug.assert;
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const FormValue = union(enum) {
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One: void,
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Two: bool,
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};
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error Whatever;
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fn foo(id: u64) -> %FormValue {
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switch (id) {
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2 => FormValue { .Two = true },
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1 => FormValue { .One = {} },
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else => return error.Whatever,
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}
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}
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test "switch prong implicit cast" {
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const result = switch (%%foo(2)) {
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FormValue.One => false,
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FormValue.Two => |x| x,
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};
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assert(result);
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}
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