Pom Versions Save

• Add p.name(_), give parser a name to identify parsing errors.
• Add p.convert(f), convert parser result to desired value, fail in case of conversion error.
• list(p,s) backtrack to the last successfully matched element.
• Merged 2 pull requests from new contributors.

• Add p.pos() to get input position after matching p.
• No longer use extra_requirement_in_impl.
• Add pom::Parser<I, O> as alias of pom::parser::Parser<'static, I, O>.

• Rename eof() to end().
• Rename term() to sym().
• Add Benchmark and document.

Add p >> q operation, where q depends on the result of p.

• Now parser's Input is a trait.
• Input has two impls: DataInput and TextInput.

• seq(), one_of() and none_of() can accept either string literals or byte string literals.
• Add json_char parser example.
• JSON parser supports escaped UTF-16 character including surrogate pairs.

Add list(p,s) to parse separated list.

Ingenious design and implementation of parser combinators.