With 15f3cd6bfc, we no longer emit a
diagnostic on a real std::vector case where the size method returns a
sugar `size_type`. This patch fixes it.
```
std::vector<int> v;
if (v.size() == 0) // => no check diagnostics
;
```
Differential Revision: https://reviews.llvm.org/D131390
Eliminate clutter by reorganizing the Lit test files for clang-tidy:
- Move checkers/<module>-* to checkers/<module>/*.
- Move module specific inputs from Inputs to <module>/Inputs. Remove
any module prefix from the file or subdirectory name as they are no
longer needed.
- Introduce a Lit substitution %clang_tidy_headers for the system
headers in checkers/Inputs/Headers and use this throughout. This
avoids referencing system headers through a relative path to the
parent directory and makes it clear that these fake system headers are
shared among all modules.
- Update add_new_check.py to follow the above conventions when creating
the boiler plate test files for a new check.
- Update Contributing.rst to describe per-module Inputs directory and
fix link to test source code.
Differential Revision: https://reviews.llvm.org/D128072
Haojian Wu