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3607 :: Overloading Module Access Operator

• aedt (orginal) [2018-03-04T03:41:17+01:00] view original

  Hello again. For accessing modules the dot operator ('.') is used. For example

   system.swap(varx, vary)
  Run

  My question is if it's possible to overload this dot operator with something else? For example

   system::swap(varx, vary)
  Run

  If so how? And how can I export this operator across the whole project so I don't have to import the module that defines this every time? Thanks.

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• Araq (orginal) [2018-03-05T09:19:18+01:00] view original

  Maybe like this, but it's a bad idea:

  template `::`*(a, b: untyped): untyped = a.b
  Run

  And how can I export this operator across the whole project so I don't have to import the module that defines this every time?

  Via an --import:"my_ugly_scope_operator" in your configuration.

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• DTxplorer (orginal) [2018-03-05T12:52:34+01:00] view original

  I can understand aedt rationale. The dot is already used to access objects members. aedt idea made things clearer for me. But maybe I misunderstood the real semantic of these expressions. Anyway, thanks for the tip Araq.

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• Araq (orginal) [2018-03-05T13:00:47+01:00] view original

  So? () is used for function calls as well as for grouping expressions.

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• StasB (orginal) [2018-03-05T13:17:16+01:00] view original

  I guess the difference is that the meaning of () is disambiguated on the grammar level (or at least I hope that Nim's grammar is unambiguous), while the meaning of . depends on the semantics of a given piece of code, which depend on the context (not that I consider it enough of a problem to justify something ugly like double colons).

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• Araq (orginal) [2018-03-05T13:19:25+01:00] view original

  Fair enough, I guess.

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