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545 :: Generic complex

• shiv (orginal) [2014-09-03T00:29:47+02:00] view original

  If I want to implement a generic complex number type:

  type

  TComplex [T] = tuple [x, y : T]

  What is the best way to add generic operations so that:

  1. maximum re-use of existing overloads (minimize code writing)
  2. maximum run-time efficiency (no function calls in generated C code)

  are both maintained? For example:

  proc + [T] (w: TComplex [T], z: T) : TComplex [T] {.inline.} =

  (x: w.x + z, y: w.y)

  OR should I write

  proc + [T: TReal] (w: TComplex [T], z: T) : TComplex [T] {.inline.} =

  (x: w.x + z, y: w.y)

  OR something else (templates, macros, ...)?

  Also, is there a way to use (and should I use?) the borrow pragma in this case? Thanks.

  --shiv--

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• Araq (orginal) [2014-09-03T08:02:58+02:00] view original

  No, you can't use borrow. What should that mean?

  Sure go ahead, make it generic. But try to not break client code.

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