gh-104533: Add a dataclass-like decorator for ctypes structures

[ZeroIntensity]

• Issue: Annotation-based syntax for ctypes structs #104533

[read-the-docs-community]

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📚 cpython-previews | 🛠️ Build #33620062 | 📁 Comparing 2e469b6 against main (b4662e8)

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3 files changed

± library/ctypes.html
± whatsnew/3.16.html
± whatsnew/changelog.html

[johnslavik]

I meant it like this:

Suggested change

	def struct(class_or_none=None, /, *, align=None, layout=None, endian='native', pack=None):
	process_the_struct = functools.partial(
	_process_struct,
	align=align,
	layout=layout,
	endian=endian,
	pack=pack
	)
	if class_or_none is None:
	def inner(klass):
	return process_the_struct(klass)
	return inner
	return process_the_struct(class_or_none)
	def struct(class_or_none=None, /, *, align=None, layout=None, endian='native', pack=None):
	if class_or_none is None:
	return functools.partial(
	struct,
	align=align,
	layout=layout,
	endian=endian,
	pack=pack,
	)
	return process_the_struct(class_or_none)

That's how decorators of this fashion are usually made.
Feel free to ignore.

[ZeroIntensity]

process_the_struct isn't defined here; what are you trying to show?

[johnslavik]

Consider adding a collation: old syntax vs. new syntax.

[ZeroIntensity]

I don't think that's necessary -- the examples for Structure are right above.