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19 lines
875 B
Zig
19 lines
875 B
Zig
const std = @import("std");
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const builtin = @import("builtin");
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test "@sizeOf reified union zero-size payload fields" {
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if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest;
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comptime {
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try std.testing.expect(0 == @sizeOf(@Type(@typeInfo(union {}))));
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try std.testing.expect(0 == @sizeOf(@Type(@typeInfo(union { a: void }))));
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if (builtin.mode == .Debug or builtin.mode == .ReleaseSafe) {
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try std.testing.expect(1 == @sizeOf(@Type(@typeInfo(union { a: void, b: void }))));
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try std.testing.expect(1 == @sizeOf(@Type(@typeInfo(union { a: void, b: void, c: void }))));
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} else {
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try std.testing.expect(0 == @sizeOf(@Type(@typeInfo(union { a: void, b: void }))));
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try std.testing.expect(0 == @sizeOf(@Type(@typeInfo(union { a: void, b: void, c: void }))));
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}
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}
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}
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