The concept specialization expression should start at the location of
the nested qualifiers when it has nested qualifiers.
This ensures that libclang reports correct source ranges that include
all subexpressions when visiting the expression.
Differential Revision: https://reviews.llvm.org/D126332
These tests are failing on the PPC64 AIX CI bot, but it's unclear why,
as they pass on other CI jobs.
I marked them as unsupported on AIX for now while investigating the failure.
This commit builds upon recently added indexing support for C++ concepts
from https://reviews.llvm.org/D124441 by extending libclang to
support indexing and visiting concepts, constraints and requires
expressions as well.
Differential Revision: https://reviews.llvm.org/D126031
