python - Cython c++ example fails to recognize c++, why? -

i'm attempting build example 'using c++ in cython' @ the cython c++ page, setup appears not recognize language, c++.

the files, taken same page are:

rectangle.cpp

#include "rectangle.h"  using namespace shapes;  rectangle::rectangle(int x0, int y0, int x1, int y1){     x0 = x0;     y0 = y0;     x1 = x1;     y1 = y1; }  rectangle::~rectangle() {}  int rectangle::getlength() {     return (x1 - x0); }  int rectangle::getheight() {     return (y1 - y0); }   int rectangle::getarea() {     return (x1 - x0) * (y1 - y0); }  void rectangle::move(int dx, int dy) {     x0 += dx;     y0 += dy;     x1 += dx;     y1 += dy; } 

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rectangle.h:

namespace shapes {     class rectangle {     public:     int x0, y0, x1, y1;     rectangle(int x0, int y0, int x1, int y1);     ~rectangle();     int getlength();     int getheight();     int getarea();     void move(int dx, int dy);     };  }  

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rectangle.pyx

cdef extern "rectangle.h" namespace "shapes": cdef cppclass rectangle:     rectangle(int, int, int, int)     int x0, y0, x1, y1     int getlength()     int getheight()     int getarea()     void move(int, int)  cdef class pyrectangle:     cdef rectangle *thisptr      # hold c++ instance we're wrapping     def __cinit__(self, int x0, int y0, int x1, int y1):         self.thisptr = new rectangle(x0, y0, x1, y1)     def __dealloc__(self):         del self.thisptr     def getlength(self):         return self.thisptr.getlength()     def getheight(self):         return self.thisptr.getheight()     def getarea(self):         return self.thisptr.getarea()     def move(self, dx, dy):         self.thisptr.move(dx, dy) 

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setup.py

from distutils.core import setup cython.build import cythonize  setup(ext_modules = cythonize(        "rectangle.pyx",            # our cython source        sources=["rectangle.cpp"],  # additional source file(s)        language="c++",             # generate c++ code       )) 

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i attempt build with:

python setup.py --build_ext --inplace 

but fails, error "operation allowed in c++" suggesting language="c++" option not being passed correctly.

cython rectangle.pyx --cplus 

does produce c++ file, hoping able setup.py method work.

the entire error text is:

cythonizing rectangle.pyx  error compiling cython file: ------------------------------------------------------------ ...         void move(int, int)  cdef class pyrectangle:     cdef rectangle *thisptr      # hold c++ instance we're wrapping     def __cinit__(self, int x0, int y0, int x1, int y1):         self.thisptr = new rectangle(x0, y0, x1, y1)                       ^ ------------------------------------------------------------  rectangle.pyx:13:27: operation allowed in c++  error compiling cython file: ------------------------------------------------------------ ... cdef class pyrectangle:     cdef rectangle *thisptr      # hold c++ instance we're wrapping     def __cinit__(self, int x0, int y0, int x1, int y1):         self.thisptr = new rectangle(x0, y0, x1, y1)     def __dealloc__(self):         del self.thisptr        ^ ------------------------------------------------------------  rectangle.pyx:15:8: operation allowed in c++ traceback (most recent call last):   file "setup.py", line 8, in <module>     language="c++",             # generate c++ code   file "/library/python/2.7/site-packages/cython-0.19.1-py2.7-macosx-10.8intel.egg/cython/build/dependencies.py", line 753, in cythonize     cythonize_one(*args[1:])   file "/library/python/2.7/site-packages/cython-0.19.1-py2.7-macosx-10.8intel.egg/cython/build/dependencies.py", line 820, in cythonize_one     raise compileerror(none, pyx_file) cython.compiler.errors.compileerror: rectangle.pyx 

following example exactly, on similar system yours, works fine me.

but, along few other differences (an indentationerror, naming file rectangle.pyx instead of rect.pyx, …) turned out not relevant problem, left off @ top of cython file:

# distutils: language = c++ # distutils: sources = rectangle.cpp 

and if leave off, same error.