[Question] How to do deal with operators #3
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My C++ is rusty, but this operator is an implicit conversion operator right? So For this case, you probably don't need csource "path/to/header.h":
type GC_MakeArcOfCircle* = object of CClass
type Geom_TrimmedCurve* = object of CClass
converter toGeom_TrimmedCurve*(self: GC_MakeArcOfCircle): var Geom_TrimmedCurve
{.importcpp:"(#)".}Then you use it like this: var test1 = GC_MakeArcOfCircle.init()
var test2: Geom_TrimmedCurve = test1 # implicit conversion happens here at both the Nim and C++ levelsif you want a C++ reference variable, you might need something like let test2 {.cref.}: Geom_TrimmedCurve = test1but currently |
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No success yet. I have the following code:
import occt
import cinterop
let
myWidth = 50.0
myThickness = 20.0
myHeight = 70.0
aPnt1 = newPnt(-myWidth / 2.0, 0, 0)
aPnt2 = newPnt(-myWidth / 2.0, -myThickness / 4.0, 0)
aPnt3 = newPnt(0, -myThickness / 2.0, 0)
aPnt4 = newPnt(myWidth / 2.0, -myThickness / 4.0, 0)
aPnt5 = newPnt(myWidth / 2.0, 0, 0)
echo aPnt2
echo aPnt3
echo aPnt4
var aArcOfCircle = makeArcOfCircle(aPnt2, aPnt3, aPnt4)
import cinterop
import gp_Pnt
csource "Standard_Handle.hxx":
cnamespace opencascade:
type
handle*[T] = object of CClass
type
Handle = handle
csource "Geom_TrimmedCurve.hxx":
type
Geom_TrimmedCurve* = object of CClass
type
Handle_Geom_TrimmedCurve* = Handle[Geom_TrimmedCurve]
csource "GC_MakeArcOfCircle.hxx":
type
GC_MakeArcOfCircle* = object of CClass
gp_Circ* = object of CClass
converter toHandle_Geom_TrimmedCurve*(self: GC_MakeArcOfCircle): var Handle_Geom_TrimmedCurve {.importcpp:"(#)".}
proc makeArcOfCircle*(a,b,c:Pnt):GC_MakeArcOfCircle =#Handle_Geom_TrimmedCurve =
return GC_MakeArcOfCircle.init(a,b,c)An error is raised on the generated c++ code: Where the cpp code is complaining about is:
N_LIB_PRIVATE N_NIMCALL(GC_MakeArcOfCircle, makeArcOfCircle__IyOEPhf5t8KHn5UprzMDPQ)(gp_Pnt* a, gp_Pnt* b, gp_Pnt* c) {
GC_MakeArcOfCircle result; //<--------- BLAMING LINE
nimfr_("makeArcOfCircle", "/home/jose/src/occt.nim/src/lib/gc.nim");
{ nimln_(29, "/home/jose/src/occt.nim/src/lib/gc.nim");
result = GC_MakeArcOfCircle((*a), (*b), (*c));
goto BeforeRet_;
}BeforeRet_: ;
popFrame();
return result;
}
/* section: NIM_merge_VARS */
N_LIB_PRIVATE NIM_CONST NF myWidth__4Dx1Z09bA3pua5C9aa1tzO9bg = 5.0000000000000000e+01;
N_LIB_PRIVATE NIM_CONST NF myThickness__jgfYRYDsoA1aSux3WNwLfA = 2.0000000000000000e+01;
N_LIB_PRIVATE NIM_CONST NF myHeight__9cE6D4OW0Dv9cPNqcUOfsMsQ = 7.0000000000000000e+01;
N_LIB_PRIVATE gp_Pnt aPnt1__6nbm5xlJ7PvXUKoJssDDjQ;
N_LIB_PRIVATE gp_Pnt aPnt2__Kk2fL5Mpd9cYsMZ47DXOCuQ;
N_LIB_PRIVATE gp_Pnt aPnt3__9czGtnL4XruNd3ShGqu9bjRQ;
N_LIB_PRIVATE gp_Pnt aPnt4__nocn09bSjOm249b6Cy9afk8kQ;
N_LIB_PRIVATE gp_Pnt aPnt5__kgutqiL8dpxwZe10yFf3Iw;
N_LIB_PRIVATE GC_MakeArcOfCircle aArcOfCircle__Uweq2PxKseJhRoJApFwnOw; //<----- BLAMING LINE
extern TFrame* framePtr__HRfVMH3jYeBJz6Q6X9b6Ptw;
extern TFrame* framePtr__HRfVMH3jYeBJz6Q6X9b6Ptw;
extern TFrame* framePtr__HRfVMH3jYeBJz6Q6X9b6Ptw;
extern TFrame* framePtr__HRfVMH3jYeBJz6Q6X9b6Ptw;
extern TFrame* framePtr__HRfVMH3jYeBJz6Q6X9b6Ptw;
extern TFrame* framePtr__HRfVMH3jYeBJz6Q6X9b6Ptw;I am a bit lost |
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It worked with a couple of changes: csource "GC_MakeArcOfCircle.hxx":
type
GC_MakeArcOfCircle* = object of CClass
gp_Circ* = object of CClass
converter toHandle_Geom_TrimmedCurve*(self: GC_MakeArcOfCircle):Handle_Geom_TrimmedCurve {.importcpp:"(#)".}
proc makeArcOfCircle*(a,b,c:Pnt):Handle_Geom_TrimmedCurve =
return GC_MakeArcOfCircle.init(a,b,c) |
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How should I deal with operators?
For instance, the following operator:
gets wrapped by c2nim as something like:
How would I use operators from cinterop.
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