Clang provides cursor range for each declaration in
symbol outline. Use that information to search for
more accurate correspondence between a cursor position
in editor and an entry in symbol outline.
For example skip indexes with not matching ranges to
prevent pure declarations from automatically become
parents of everything coming after them.
Change-Id: I0ef95c26772050cd6655e830288c46118aba38bb
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@qt.io>
Build the tree in only one loop.
clangbackend generates tokens almost as fast as it
did before (about 10% slower in general).
Broken documents are more affected and take much more
time (about 300%) but it's better to have this time spent
on backend side then in QtC itself.
Task-number: QTCREATORBUG-20205
Change-Id: I34c58bca30c4494005a029abd82c7e612ecd6fb9
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@qt.io>
