cython issue: 'bool' is not a type identifier

Question

I'm desperately trying to expose a `std::vector` class member to a Python class. Here is my C++ class: ``` class Test { public: std::vector test_fail; std::vector test_ok; }; ``` While the access and conversion of `test_ok` of type `double` (or int, float, ..) works, it does not for `bool`! Here is my Cython class: ``` cdef class pyTest: cdef Test* thisptr cdef public vector[bool] test_fail cdef public vector[double] test_ok cdef __cinit__(self): self.thisptr = new Test() self.test_fail = self.thisptr.test_fail # compiles and works if commented self.test_ok = self.thisptr.test_ok cdef __dealloc__(self): del self.thisptr ``` The error I get is : ``` Error compiling Cython file: ------------------------------------------------------------ ... cdef extern from *: ctypedef bool X 'bool' ^ ------------------------------------------------------------ vector.from_py:37:13: 'bool' is not a type identifier ``` I'm using python 2.7.6 and Cython 0.20.2 (also tried 0.20.1). I…

Accepted Answer

I have found a valid workaround, although it may not be optimal.

I have replaced the members types of the `pytest` class with python lists.

The conversion is now done implicitly, as described in the documentation: https://docs.cython.org/en/latest/src/userguide/wrapping_CPlusPlus.html#standard-library

All conversions create a new container and copy the data into it. The items in the containers are converted to a corresponding type automatically, which includes recursively converting containers inside of containers, e.g. a C++ vector of maps of strings.

So now, my class looks like this:

```
cdef class pyTest:
     cdef Test* thisptr
     cdef public list test_fail #now ok
     cdef public list test_ok

cdef __cinit__(self):
         self.thisptr = new Test()
         self.test_fail = self.thisptr.test_fail # implicit copy & conversion
         self.test_ok = self.thisptr.test_ok # implicit copy and conversion

cdef __dealloc__(self):
         del self.thisptr
```

cython issue: 'bool' is not a type identifier

Solution

Problem