Ada library for creating grammar parsers and lexers. Supports not only 8 bit streams but also Unicode and even streams of arbitrary objects. Powerful, flexible and extensible. Creates syntax tree. Has all standard parser constructs (alternatives, optional element etc.) and various pre-defined more complex constructs (e.g. different kinds of repetition). These constructs have even variations for subtly different needs (e.g. for different representation of data to be extracted). Arbitrary reliable look-ahead. No distinction between parser and lexer. Object oriented. Documented.

UniParser for Ada is the Shareware version. The full version can be purchased by clicking on the "CLICK HERE TO ORDER" button below for around  62USD.