[Swig-devel] [ swig-Bugs-3582381 ] %new_copy may generate invalid C++

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Bugs item #3582381, was opened at 2012-10-31 20:02
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Category: code generation (general)
Group: None
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: https://me.yahoo.com/mike_rovne ()
Assigned to: Nobody/Anonymous (nobody)
Summary: %new_copy may generate invalid C++

Initial Comment:
Generated code
  static uint8* *copy_uint8pp(uint8* value) { 
    return (new uint8*(static_cast< const uint8*& >(value)));
  }
is invalid (clang error):
error: non-const lvalue reference to type 'const uint8 *' (aka 'const unsigned char *') cannot bind to a value of unrelated type 'uint8 *' (aka 'unsigned char *')
    return (new uint8*(static_cast< const uint8*& >(value)));
                       ^                            ~~~~~
error: cannot initialize a new value of type 'uint8 *' (aka 'unsigned char *') with an lvalue of type 'const uint8 *' (aka 'const unsigned char *')
    return (new uint8*(static_cast< const uint8*& >(value)));
                ^      ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2 errors generated.

called from cpointer.i:
%define %pointer_functions(TYPE,NAME)
...
  static TYPE *copy_##NAME(TYPE value) { return %new_copy(value, TYPE); }

when wrapping
f(uint8* source, int file_size, int* width, int* height,  uint8** dest)

Fix by 
==== Lib/typemaps/swigmacros.swg - my/Lib/typemaps/swigmacros.swg ====
161c161
< # define %new_copy(val,Type...)             (new Type(%static_cast(val, const Type&)))
---
> # define %new_copy(val,Type...)             (new Type(%static_cast(val, Type const&)))


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