Merge pull request #422 from shaishasag/master

Added tests for cpp auto conversion of function parametes

tests/errors/cpp_no_auto_conversion.pyx

+# mode: error
+# tag: cpp
+
+# cpp will convert function arguments to a type if it has suitable constructor
+# we do not want that when calling from cython
+
+cdef extern from "no_such_file.cpp" nogil:
+    cppclass wrapped_int:
+        long long val
+        wrapped_int()
+        wrapped_int(long long val)
+        wrapped_int& operator=(const wrapped_int &other)
+        wrapped_int& operator=(const long long other)
+
+    long long constructor_overload(const wrapped_int& x)
+    long long constructor_overload(const wrapped_int x)
+
+cdef long long e = constructor_overload(17)
+ 
+
+_ERRORS = u"""
+18:40: Cannot assign type 'long' to 'const wrapped_int'
+"""