const assert = @import("std").debug.assert; const str = @import("std").str; const io = @import("std").io; const ET = enum { SINT: i32, UINT: u32, pub fn print(a: &const ET, buf: []u8) -> %usize { return switch (*a) { ET.SINT => |x| { io.bufPrintInt(i32, buf, x) }, ET.UINT => |x| { io.bufPrintInt(u32, buf, x) }, } } }; fn enumWithMembers() { @setFnTest(this); const a = ET.SINT { -42 }; const b = ET.UINT { 42 }; var buf: [20]u8 = undefined; assert(%%a.print(buf) == 3); assert(str.eql(buf[0...3], "-42")); assert(%%b.print(buf) == 2); assert(str.eql(buf[0...2], "42")); }