Implement 'existing' keyword for skipping compilation of a symbol #446
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This is useful for things that are defined in a FOREIGN pragma, either by importing from a Haskell module or as an inline Haskell definition
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This is useful for things that are defined in a FOREIGN pragma, either by importing from a Haskell module or as an inline Haskell definition.
I also noticed that currently there are absolutely no checks done on the existing-class keyword, so as a hack you could just use it for any symbol that you don't want to be compiled by agda2hs but still recognized by it. This PR also changes it so that we check at least that it is applied to a record type (unless we also want it to apply to postulates?)
Note that I have not yet written any tests for this, so I'm marking it as a draft for now.