Avoid copying unaligned 16-bit values since some platforms require them to be aligned. Use memcpy() instead to let the C compiler decide how to do it.

Closes https://github.com/cython/cython/issues/4343

Avoid copying unaligned 16-bit values since some platforms require them to be aligned. Use memcpy() instead to let the C compiler decide how to do it.

Closes https://github.com/cython/cython/issues/4343

See https://github.com/cython/cython/pull/4142#issuecomment-831464115

I don't think MinGW has worked since around Python 3.4 (but I'm
not completely confident in that) while I know that MSVC does
work. Therefore we should recommend that.

Compiling ExprNodes.py was creating hundreds of tuples containing ("self", "env") for example, because it wasn't able to match and deduplicate them.

"PyUnicode_CompareWithASCIIString()" does not raise exceptions and takes a "const char*" as argument.

* Avoid usage of `const` or `volatile` in buffer struct field declarations.
* Avoid newline replacement in the test helper functions `write_file()` and `write_newer_file()`.

See https://github.com/cython/cython/pull/4324

These were lost when cdef properties (for extern types) were introduced.

Closes #4322 (based on my interpretation of the problem as an error-reporting issue)

Adds utility code sections to toggle C compiler warnings for the duration of the utility code.

Fix output encoding problems in the test runner with Py2.7 by not trying to decode the C compiler output and instead printing it unchanged as bytes.

Revert "Fix output encoding problems in the test runner with Py2.7 by replacing implicit calls to str() with (unicode) string concatenation."

This reverts commit 931710d8.

Fix output encoding problems in the test runner with Py2.7 by replacing implicit calls to str() with (unicode) string concatenation.

runtests: include the C compiler error output in the compile exception to show it at the end of the test run.

Turns out that typeid() and C++ operators already work with "cpp_locals".

Add a warning in the docs that "conditional compilation" is not a good way to do most things that users commonly do with it.

See the discussion in https://github.com/cython/cython/issues/4287

Fix compilation of "ParseTreeTransforms" in Py2. It previously tried to compare the 'directivetype' to 'str', which misses Py2 str when compiling with language level 3.

Add CI jobs that compile more Cython modules with "--cython-compile-all", to make sure that this keeps working and to allow comparing the performance difference.

Fixes https://github.com/cython/cython/issues/3174
Closes https://github.com/cython/cython/pull/3175

I've removed all identification of is_self_arg from the parser, since I think it's better dealt with when analysing the declarations.

Original test copied from https://github.com/cython/cython/pull/3175

Fixes https://github.com/cython/cython/issues/4308

Make a helper function in a C++ test correctly propagate exceptions so that it won't have to spit out compiler warnings.

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

Rewrite the section on fused types in function signatures to make it clearer how multiple fused types interact here.