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.
See also: syntax tree, BNF, Ada library, lexer generator, grammar generator, parser generator, grammar tree, parsing tree, Unicode
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