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Replace current line based parsing #37

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mholthausen opened this issue May 4, 2021 · 1 comment

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mholthausen commented May 4, 2021

Maybe consider a replacement for the current line based parser, as mentioned in this comment

geographika commented May 4, 2021

@mholthausen - a few notes you might find useful.

There is a full Mapfile grammar in Python at https://github.com/geographika/mappyfile/blob/master/mappyfile/mapfile.lalr.g which uses Lark. It has been tested on all the Mapfiles that are used in the MapServer CI testing.

Lark has a converter from nearly to Lark, but not currently the other way round. However

These might get added in the future, if enough users ask for them.

https://github.com/lark-parser/lark/blob/master/docs/tools.md

So it might be worth considering https://github.com/kach/nearley as the parsing engine so the same source grammar could be used.

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