...Please consider using our new work at https://github.com/OpenFortranProject/ofp-sdf. While the SDF parser is not as advanced as the ANTLR-based parser, it provides much more capabilities, including a term rewriting system for creating a Fortran AST (Abstract Syntax Tree) using Stratego/XT (see http://strategoxt.org) and other custom program transformations.
The OFP ANTLR-based parser is no longer under active development.
Implementation of Combinatory Reduction Systems (CRS) with experimental extensions, in Java. CRS is a formalism for higher-order rewriting invented by J.W.Klop in 1980. For further details see the Project/Web Site.
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Pure is a modern-style functional programming language based on term rewriting, slated to become the much improved successor of the author's Q language. NOTE: This project has moved to Github, see https://agraef.github.io/pure-lang/.