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const std = @import("std");
const builtin = @import("builtin");
const expectEqual = std.testing.expectEqual;
test "flags in packed union" {
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest;
const FlagBits = packed struct(u8) {
enable_1: bool = false,
enable_2: bool = false,
enable_3: bool = false,
enable_4: bool = false,
other_flags: packed union {
flags: packed struct(u4) {
enable_1: bool = true,
enable_2: bool = false,
enable_3: bool = false,
enable_4: bool = false,
},
bits: u4,
} = .{ .flags = .{} },
};
var test_bits: FlagBits = .{};
try expectEqual(false, test_bits.enable_1);
try expectEqual(true, test_bits.other_flags.flags.enable_1);
test_bits.enable_1 = true;
try expectEqual(true, test_bits.enable_1);
try expectEqual(true, test_bits.other_flags.flags.enable_1);
test_bits.other_flags.flags.enable_1 = false;
try expectEqual(true, test_bits.enable_1);
try expectEqual(false, test_bits.other_flags.flags.enable_1);
}
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