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Camlp4 tool
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README.md

camlp4

Camlp4 was a software system for writing extensible parsers for programming languages. Since August 2019, Camlp4 is no longer maintained. The last release of Camlp4 was the 4.08 release. Maintainers of Camlp4-using projects are encouraged to switch to other systems:

  • For new projects or actively-moving projects, we recommend adopting ppx attributes and extensions, which is now the preferred way to perform AST transformations on OCaml programs.

  • For slow-moving projects or users of other Camlp4 features (extensible grammars), switching to the (maintained) Camlp5 variant of the preprocessor should be easy.

If you would like to take over Camlp4, please get in touch with @diml.

Building from git

Camlp4 branches try to follow OCaml ones. To build with the trunk of OCaml, you need to use the trunk branch of Camlp4. To build for a specific version, for instance 4.02.1, use the 4.02 branch of Camlp4.

Of cource, this was true until 4.08. The trunk branch of Camlp4 builds with 4.08 only.

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