SGF Parser

A SGF Parser for Rust. Supports all SGF properties, and tree branching.

Using pest for the actual parsing part.

Example usage

```rust use sgf_parser::*;

let sgfsource = "(;EV[event]PB[black]PW[white]C[comment];B[aa])"; let tree: Result = parse(sgfsource);

let tree = tree.unwrap(); let unknownnodes = tree.getunknownnodes(); asserteq!(unknown_nodes.len(), 0);

let invalidnodes = tree.getinvalidnodes(); asserteq!(invalid_nodes.len(), 0);

tree.iter().foreach(|node| { assert!(!node.tokens.isempty()); });

let sgfstring: String = tree.into(); asserteq!(sgfsource, sgfstring()); ```