1) Entry utility_code wasn't being imported unless the entry was visibly used. The utility code is needed for the definition even if unused. I think this is what utility_code_definition is for, but I'm not completely sure. I also had to add some calls to ensure it's used.

2) CppOptionalTempCoercions weren't being moved correctly. Tested by printing from the destructor.

3) cdef-class attributes weren't being created or destroyed correctly. Tested by printing from the destructor

See https://github.com/cython/cython/issues/4022#issuecomment-870394893

This avoids the need for default constructors of stack allocated variables and temps by allowing late initialisation.

Closes https://github.com/cython/cython/issues/4160

Add missing argument when instantiating a test class. The argument was added in https://github.com/cython/cython/commit/3bd321f17474aafde1bd497163b3e7ba089ee2cc

Fixes https://github.com/cython/cython/issues/4243
(and probably a bunch more annotation bugs)

AnnotationNode doesn't have any child_attrs/subexprs because it mostly doesn't want to be analyzed (it's just transformed to an evaluable string). However this means that InterpretCompilerDirectives wasn't visiting its children to set is_cython_module and so the typing was failing. I've special-cased InterpretCompilerDirectives to visit AnnotationNode fully.

Fixes https://github.com/cython/cython/issues/4198
Fixes https://github.com/cython/cython/issues/4196

This was causing a (correct) warning.

It looks like putting the title between `.. glossary::` and the entries messed it up.

Fixes issue https://github.com/cython/cython/issues/3065
Fixes issue https://github.com/cython/cython/issues/3066

* delete cpp_exception_declaration_compatibility test
  Because I'm emitting an error at an earlier stage I don't think there's a way to get this test to work.

Reported in https://github.com/cython/cython/pull/4228

Closes https://github.com/cython/cython/issues/3922

Partially reverts https://github.com/cython/cython/commit/1027db04fb7c5bbfea2b9bcdfce0b1f384e26a93

Also make a couple of improvements regarding clarity and text formatting.

See https://github.com/cython/cython/issues/4187

* .gitignore: add directory for docs build and cython_debug
* doc-requirements.txt: add sphinx-tabs
* conf.py: add and setup sphinx-tabs extension
* Create _static\css\tabs.css for customisation
* add "two-syntax-variants-used" file as a preface about the different typing variants

See https://github.com/cython/cython/issues/4200Signed-off-by: Stefan Behnel <stefan_ml@behnel.de>

Closes https://github.com/cython/cython/pull/4224

Automatically add stubs for "cython.cimports.*" in the test runner to make them importable in Python (although not necessarily runnable).

Automatically prepend "import cython" to the examples if necessary.

See https://github.com/cython/cython/pull/4213#discussion_r648005583

Closes https://github.com/cython/cython/issues/4214
Closes https://github.com/cython/cython/issues/2811

* Set "entry.qualified_name" for builtin types.
* Make sure we always have a correct "qualified_name" for all symtab Entry instances.

Looking at the Cython code I spotted a few areas where it contains special paths for Pyston v1.
Pyston v1 only supports python2 and is dead but we did release a new Pyston v2 which is a fork of CPython 3.8.
As we don't currently set `PYSTON_VERSION` in v2 the current code can't trigger and can be removed.

I hoped we would not need any special casing for v2 because it should be fully compatible with CPython but
https://github.com/cython/cython/issues/4200 may temporarily need one but I think the current
code is overkill and if necessary I can add (part of) it back later on.

Split the interface of "cythonrun" and "BuildExecutable" so that the latter no longer automatically runs the program.

MSVC appears not like like `#if/#else` with an macro call.
Fixes https://github.com/cython/cython/issues/4202