Forty McFortface is a parser for the Fortran programming language according to the Fortran 2008 ISO standard. Additionally, the pragma languages OpenACC 2.5 and OpenMP 4.0 are supported.

The parser includes a Fortran grammer written in JastAdd and generates syntax trees according to it.

Besides the possibility to extend the parser specification itself, it is possible to parse only fragments of Fortran, e.g. expressions or statements and to put placeholders, so-called slots into the program code instead of those fragments.

Please note that the parser is in a very early stage of development and may not be working as expected in some cases.

License:

The parser is avialable under a two-clause BSD license.

It uses four other projects:

• Forty generates a JastAdd AST. JastAdd is available under a modified BSD license.
• The test cases for the parser originate from OpenFortran and are available under a BSD license.
• The debugging program DrAST from is also available under a BSD license.
• The RATS! parser generator is used. Its license is GPL, but the runtime libraries required are LGPL.