iface to_str { fn to_str() -> ~str; } impl of to_str for int { fn to_str() -> ~str { int::str(self) } } impl of to_str for i8 { fn to_str() -> ~str { i8::str(self) } } impl of to_str for i16 { fn to_str() -> ~str { i16::str(self) } } impl of to_str for i32 { fn to_str() -> ~str { i32::str(self) } } impl of to_str for i64 { fn to_str() -> ~str { i64::str(self) } } impl of to_str for uint { fn to_str() -> ~str { uint::str(self) } } impl of to_str for u8 { fn to_str() -> ~str { u8::str(self) } } impl of to_str for u16 { fn to_str() -> ~str { u16::str(self) } } impl of to_str for u32 { fn to_str() -> ~str { u32::str(self) } } impl of to_str for u64 { fn to_str() -> ~str { u64::str(self) } } impl of to_str for float { fn to_str() -> ~str { float::to_str(self, 4u) } } impl of to_str for bool { fn to_str() -> ~str { bool::to_str(self) } } impl of to_str for () { fn to_str() -> ~str { ~"()" } } impl of to_str for ~str { fn to_str() -> ~str { self } } impl of to_str for (A, B) { fn to_str() -> ~str { let (a, b) = self; ~"(" + a.to_str() + ~", " + b.to_str() + ~")" } } impl of to_str for (A, B, C){ fn to_str() -> ~str { let (a, b, c) = self; ~"(" + a.to_str() + ~", " + b.to_str() + ~", " + c.to_str() + ~")" } } impl of to_str for ~[A] { fn to_str() -> ~str { let mut acc = ~"[", first = true; for vec::each(self) |elt| { if first { first = false; } else { str::push_str(acc, ~", "); } str::push_str(acc, elt.to_str()); } str::push_char(acc, ']'); acc } } impl of to_str for @A { fn to_str() -> ~str { ~"@" + (*self).to_str() } } impl of to_str for ~A { fn to_str() -> ~str { ~"~" + (*self).to_str() } } #[cfg(test)] mod tests { #[test] fn test_simple_types() { assert 1.to_str() == ~"1"; assert (-1).to_str() == ~"-1"; assert 200u.to_str() == ~"200"; assert 2u8.to_str() == ~"2"; assert true.to_str() == ~"true"; assert false.to_str() == ~"false"; assert ().to_str() == ~"()"; assert (~"hi").to_str() == ~"hi"; } #[test] fn test_tuple_types() { assert (1, 2).to_str() == ~"(1, 2)"; assert (~"a", ~"b", false).to_str() == ~"(a, b, false)"; assert ((), ((), 100)).to_str() == ~"((), ((), 100))"; } #[test] #[ignore] fn test_vectors() { let x: ~[int] = ~[]; assert x.to_str() == ~"~[]"; assert (~[1]).to_str() == ~"~[1]"; assert (~[1, 2, 3]).to_str() == ~"~[1, 2, 3]"; assert (~[~[], ~[1], ~[1, 1]]).to_str() == ~"~[~[], ~[1], ~[1, 1]]"; } #[test] fn test_pointer_types() { assert (@1).to_str() == ~"@1"; assert (~(true, false)).to_str() == ~"~(true, false)"; } }