36 lines
1.2 KiB
Zig
36 lines
1.2 KiB
Zig
const builtin = @import("builtin");
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const std = @import("std");
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const expect = std.testing.expect;
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const mem = std.mem;
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const fmt = std.fmt;
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const ET = union(enum) {
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SINT: i32,
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UINT: u32,
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pub fn print(a: *const ET, buf: []u8) anyerror!usize {
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return switch (a.*) {
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ET.SINT => |x| fmt.formatIntBuf(buf, x, 10, .lower, fmt.FormatOptions{}),
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ET.UINT => |x| fmt.formatIntBuf(buf, x, 10, .lower, fmt.FormatOptions{}),
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};
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}
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};
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test "enum with members" {
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if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest; // TODO
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if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
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if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
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if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
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if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
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const a = ET{ .SINT = -42 };
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const b = ET{ .UINT = 42 };
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var buf: [20]u8 = undefined;
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try expect((a.print(buf[0..]) catch unreachable) == 3);
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try expect(mem.eql(u8, buf[0..3], "-42"));
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try expect((b.print(buf[0..]) catch unreachable) == 2);
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try expect(mem.eql(u8, buf[0..2], "42"));
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}
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