mirror of
https://github.com/ziglang/zig.git
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31 lines
648 B
Zig
31 lines
648 B
Zig
const std = @import("std");
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const expect = std.testing.expect;
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const Variant = union(enum) {
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int: i32,
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boolean: bool,
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// void can be omitted when inferring enum tag type.
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none,
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fn truthy(self: Variant) bool {
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return switch (self) {
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Variant.int => |x_int| x_int != 0,
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Variant.boolean => |x_bool| x_bool,
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Variant.none => false,
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};
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}
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};
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test "union method" {
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var v1: Variant = .{ .int = 1 };
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var v2: Variant = .{ .boolean = false };
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var v3: Variant = .none;
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try expect(v1.truthy());
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try expect(!v2.truthy());
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try expect(!v3.truthy());
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}
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// test
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