Update embedsignature directive to emit function annotations

Do not evaluate DEF statements inside of IF blocks with false condiions

Implement len(memoryview) and allow its usage in nogil sections.

Closes #1791.

Closes #1806.

Closes #1733

implement len(cython.view.array) as it seems weird that it is supported for memoryviews but not the array type

Fix a compiler crash when looking up cython.view.array() as a callable function with non-trivial keyword arguments.

Closes #1598.

Closes #1801

Closes #1796

Remove a macro from helper code that I find difficult to read. The result is not perfect, but at least it's more visible what get's assigned to what.

use pre-instantiated strings in __Pyx_setup_reduce() to reduce overhead - we will most likely need and indefinitely store them in the types anyway

This fixes #1798.

Suppress special casing of attribute names in closure classes since they are not user defined and any local variable name is allowed without being special.

Closes #1797.

This reverts commit b4fbd9bc.

emacs: use "" as buffer name in indirect buffers

fixes #1743

allow disabling the ABC registration of the Cython Generator and Coroutine types to support compiling the "abc" module in CPython's stdlib itself

skip_win32 doesn't properly skip tests

Minor safety/speed fix to prevent looking for a "__dict__" in an unpickled object if we don't have anything to fill it with in the first place.