Add support for OCaml.

[progoramur]

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This pull request adds support for OCaml.

Almost full support for OCaml syntax is provided including quoted string literals and extension nodes. The support for docstrings is not implemented. Also, primitive types are added to the list of keywords because most programmers do not use them as variable names (result is an exception).

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[vladak]

in general this looks good, the copyright commens have to be addressed.

[vladak]

Also, it would be nice to supply a sample OCaml file + expected xref and add a test checking it, similarly to some other analyzers.

[progoramur]

Also, it would be nice to supply a sample OCaml file + expected xref and add a test checking it, similarly to some other analyzers.

Will add within couple days.

Could you please give a good example?

[vladak]

Also, it would be nice to supply a sample OCaml file + expected xref and add a test checking it, similarly to some other analyzers.

Will add within couple days.

Could you please give a good example?

See the recently changed Fortran analyzer (PR #4642) for example.

[progoramur]

@vladak thanks for the hints. Added tests, please take a look.

[vladak]

There is a pre-existing issue tracking the OCaml support (#4407), please add fixes #4407 to the commit comment.

[vladak]

Also, rebase.

[vladak]

I believe the newly introduced files do not have to have the Portions in the copyright.

[progoramur]

@vladak

Vladimir, from my point of view, all the comments seem to have been addressed. Would you please double check if the PR can be merged? Thank you very much for your hard work on OpenGrok.

[vladak]

Looks good, sorry for the delay. Thanks for the contribution !

[progoramur]

Thank you so much for your review and hard work on this incredibly useful tool!