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7296 :: C++ FFI templates

• mantielero (orginal) [2020-12-27T12:02:09+01:00] view original

  I have a template as follows:

  template<typename T, Array::Type ARRAYTYPE, int DataSize, int DataType>
  class TemplateArray : public Array, public MixinVector<T>
  {
  Run

  What would be the wrapping? Something like this?

  type
    Type* {.include:"myfile.hxx",importcpp:"TemplateArray".} = object
    TemplateArray* {.include:"myfile.hxx",importcpp:"TemplateArray".} [T,ARRAYTYPE:Type, DataSize:cint, DataType:cint] = object
  Run

  or it should be just [T,ARRAYTYPE, DataSize, DataType] in the last line?

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• haxscramper_ (orginal) [2020-12-27T12:07:01+01:00] view original

  Most likely yes, though I'm not sure about Array::Type part. Can you provide definition of Array class too?

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• mantielero (orginal) [2020-12-27T12:19:49+01:00] view original

  Yeah. The Array::Type is an enum. I got it like:

  type
    Type* {.size:sizeof(cuint),header: "Array", importcpp: "osg::Array::Type".} = enum
      ## The type of data stored in this array.
      
      ArrayType = 0,
      ByteArrayType = 1,
      ShortArrayType = 2,
      IntArrayType = 3,
      UByteArrayType = 4,
      ....
  Run

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• haxscramper_ (orginal) [2020-12-27T12:25:08+01:00] view original

  Yes, your C++ wrapper should be working correctly

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• xigoi (orginal) [2020-12-27T15:47:37+01:00] view original

  Shouldn't it be T; ARRAYTYPE: Type instead of T, ARRAYTYPE: Type, since T is a typename, not an Array::Type?

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• mantielero (orginal) [2020-12-28T00:01:45+01:00] view original

  I think you are right. One thing that I have observed is that the manual says:

  type
    StdMap {.importcpp: "std::map", header: "<map>".} [K, V] = object
  Run

  It looks like this syntax is discouraged. And now the compiler suggest things like:

  type
    StdMap [K,V] {.importcpp: "std::map", header: "<map>".} = object
  Run

  The manual should be updated.

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