pub fn escape_default(c: char, f: &fn(char))
Return a 'default' ASCII and C++11-like char-literal escape of a char.
The default is chosen with a bias toward producing literals that are legal in a variety of languages, including C++11 and similar C-family languages. The exact rules are:
escape_unicode.
Prefix searches with a type followed by a colon (e.g.
fn:) to restrict the search to a given type.
Accepted types are: fn, mod,
struct (or str), enum,
trait, typedef (or
tdef).