Regression with tokenization of alignas()

[akbyrd]

Checklist

• This problem exists even with the setting "C_Cpp.enhancedColorization": "Disabled"

The code with a problem is:

struct alignas(8) Foo {};

alignas is being tokenized to include the parentheses. Other functionlike keywords do not include the parentheses. It looks like this bug was fixed a long time ago but has regressed. vscode is using 1.17.3 from commit e3f51cc

It looks like:

It should look like: