28 lines
731 B
Zig
28 lines
731 B
Zig
const assert = @import("std").debug.assert;
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const mem = @import("std").mem;
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const fmt = @import("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) -> %usize {
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return switch (*a) {
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ET.SINT => |x| fmt.formatIntBuf(buf, x, 10, false, 0),
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ET.UINT => |x| fmt.formatIntBuf(buf, x, 10, false, 0),
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};
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}
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};
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test "enum with members" {
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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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assert((a.print(buf[0..]) catch unreachable) == 3);
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assert(mem.eql(u8, buf[0..3], "-42"));
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assert((b.print(buf[0..]) catch unreachable) == 2);
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assert(mem.eql(u8, buf[0..2], "42"));
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}
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