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https://github.com/ziglang/zig.git
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4d05f2ae5f
Instead use the standarized option for communicating the zig compiler backend at comptime, which is `zig_backend`. This was introduced in commit 1c24ef0d0b09a12a1fe98056f2fc04de78a82df3.
19 lines
541 B
Zig
19 lines
541 B
Zig
const std = @import("std");
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test "lazy sizeof comparison with zero" {
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const Empty = struct {};
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const T = *Empty;
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try std.testing.expect(hasNoBits(T));
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}
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fn hasNoBits(comptime T: type) bool {
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if (@import("builtin").zig_backend != .stage1) {
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// It is an accepted proposal to make `@sizeOf` for pointers independent
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// of whether the element type is zero bits.
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// This language change has not been implemented in stage1.
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return @sizeOf(T) == @sizeOf(*i32);
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}
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return @sizeOf(T) == 0;
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}
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