The ToStr trait for converting to strings
ToStrof ToStr for boolof ToStr for ()of ToStr for (A,) where <A: ToStr>of ToStr for (A, B) where <A: ToStr, B: ToStr>of ToStr for (A, B, C) where <A: ToStr, B: ToStr, C: ToStr>of ToStr for &'self [A] where <'self, A: ToStr>of ToStr for ~[A] where <A: ToStr>of ToStr for @[A] where <A: ToStr>ToStrto_strfn to_str(&self) -> ~strToStr for boolto_strfn to_str(&self) -> ~strToStr for ()to_strfn to_str(&self) -> ~strToStr for (A,) where <A: ToStr>to_strfn to_str(&self) -> ~strToStr for (A, B) where <A: ToStr, B: ToStr>to_strfn to_str(&self) -> ~strToStr for (A, B, C) where <A: ToStr, B: ToStr, C: ToStr>to_strfn to_str(&self) -> ~strToStr for &'self [A] where <'self, A: ToStr>to_strfn to_str(&self) -> ~strToStr for ~[A] where <A: ToStr>to_strfn to_str(&self) -> ~strToStr for @[A] where <A: ToStr>to_strfn to_str(&self) -> ~str