Rust shogi crates: USI parser (rlib)

This repository handles conversion from strings in USI format defined in the spec.

About shogi_usi_parser crate

This crate provides methods that convert USI strings to data. For example, it can convert following strings:

as PartialPosition:

lnsgkgsnl/1r5b1/ppppppppp/9/9/9/PPPPPPPPP/1B5R1/LNSGKGSNL b - 1

as Position:

startpos moves 7g7f

(excerpt from https://web.archive.org/web/20080131070731/http://www.glaurungchess.com/shogi/usi.html)

For conversion, this crate defines the following traits and data types:

• A trait responsible for conversion from strings in USI format to Self. Implementors of this trait provides a method that reports detailed error reports, and a method that reports only whether an error occurred.
• Error: An error type for conversion. Some possible errors are the following:
  • The string representation is invalid (e.g. 9j is given as a square).
  • The parsed position is invalid.

What are out of scope?

• Failing to convert to a Position when the parser encountered illegal moves
  • Other crates are responsible for legality checking