C1805: Non standard conversion used

[DISABLE, INFORMATION, WARNING , ERROR]

In ANSI-C it is normally not allowed to cast an object pointer to a function pointer or a function pointer to an object pointer. Note that the layout of a function pointer may not be the same than the layout of a object pointer.

  typedef unsigned char (*CmdPtrType) 

  

          (unsigned char, unsigned char);

  

  typedef struct STR {int a;} baseSTR;

  

  baseSTR strDescriptor;

  

  CmdPtrType myPtr;

  

  // next line does not strictly correspond to ANSI C

  

  //   but we make sure that the correct cast is being used

  

  void foo(void) {

  

    myPtr=(CmdPtrType)(void*)&strDescriptor; // 
  message C1805

  

  }

  

  */

  

  /*! \page pageC1806 C1806: Illegal cast-operation

  

  [ERROR]

  

There is no conversion for doing the desired cast.

The cast operator must specify a type, that can be converted to the type, which the expression containing the cast operator would be converted to.