How to pass from Matlab to my C++ library a pointer to a class_B that is within a structure of a class_A?

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Naser Zormati 2023-10-17

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2034714-how-to-pass-from-matlab-to-my-c-library-a-pointer-to-a-class_b-that-is-within-a-structure-of-a-cla

评论： Naser Zormati 2023-10-17

I am able to create an array of structures from my cLibrary:

iniArray = clibArray('clib.cLibrary.strucType1',4);

I am able to create an instance of Class_A:

myClassA = clib.mycLibrary.nameSpaceX.Class_A();

I am also able to create an istance of class_B

myClassB = clib.mycLibrary.nameSpaceX.Class_B(iniArray,10);

I am also able to assign values to variables 1...4 in iniArray,

iniStruc.var1 = 0.2340;

iniArray.var2 = 1.5000e-06;

iniArray.var3 = 7890;

iniArray.var4 = 1141;

but when I try to assign myClassB to Class_B_ptr in iniArray

iniArray.Class_B_ptr = myClassB;

I get the following error:

Unable to set the 'Class_B_ptr' property of class

'InitStructT' because it is read-only.

Was not able to use lib.pointer or libpointer either

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

nameSpace nameSpaceX

{

class __declspec(dllexport) Class_A

{

public:

typedef struct InitStructT {

nameSpaceX::Class_B* Class_B_ptr = nullptr;

double var1 = 0.0;

double var2 = 0.0;

int var3 = 964;

int var4 = 965;

.....

}InitStruct;

......

Class_A(void);

......

void Initialize(InitStruct *inputs);

......

}

...........

}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

in a separate file

nameSpace nameSpaceX

{

class __declspec(dllexport) Class_B

{

public:

static const int K1 = 10;

Class_B(strucType1 myStruct[12],

int var1 = 100

);

void Initialize(

...........

)

......

}

...........

}

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Naser Zormati 2023-10-17

See Mathworks staff answer to a similar question at:

https://www.mathworks.com/matlabcentral/answers/1977489-how-to-use-a-plain-old-data-structure-with-c-interface-when-one-of-the-fields-is-a-pointer-and-has

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