clang-format: unexpected change on template declaration

[sylvestre]

Bugzilla Link	45358
Resolution	INVALID
Resolved on	Apr 14, 2020 15:24
Version	10.0
OS	Linux
Blocks	#44654 #35642
CC	@tstellar

Extended Description

with:
template
BaseAutoUnlock(MutexType &)->BaseAutoUnlock<MutexType &>;

clang-format-10 returns:
template
BaseAutoUnlock(MutexType &) -> BaseAutoUnlock<MutexType &>;

(note the " -> ")

not sure it is a legit change?

[llvmbot]

As long as this only happens for deduction guides and not traditional ptr->member derefs, this seems fine. I see that e.g. [1] uses the spaced-out format.

[1] https://en.cppreference.com/w/cpp/utility/functional/function/deduction_guides

[llvmbot]

This appears to be intentional per bug 35518.