Members of non-concrete template types do not have useful spelling ranges (likely unexposed).
C<int> f; f.x // .x produces a MemberRefExpr which has a spelling range of `x`.
C<T> e; e.x // .x produces a MemberRefExpr which has a spelling range of `e` (weird).
To make `e.x` (MemberRefExpr with empty spelling name) able to find
definition, We use cursor extent (larger than spelling range) `e.x`. It
would be better if we could restrict the ranges to `.x` or just `x`.
Nevertheless, larger ranges are less specific, and should do no harm
because they will be overriden by more specific variable references `e`.
cursor extents have larger ranges and less specific, thus making
them overridable by more specific (with smaller range) symbols.
Thus we do not need to hide them in query.cc:BuildFileDef
For example, the left paren in `A a(3)` jumps to the constructor.
the left paren in `A a = f()` jumps to the copy/move constructor.
Before, an assert() macro expansion jumps to __assert_fail but not
assert. This is because OnIndexReference finds a reference to __assert_fail
but VisitMacroDefinitionAndExpansions rejects the expansion.
src/type_printer.cc demonstrates how to leverage clang C++ API.
It includes clang/**/*.h headers and CXTranslationUnit.h which resides
in clang/tools/libclang/ but is not exposed in clang/include/clang-c/
These libclang/ header files are stable and provide some struct definitions used by clang-c/ header files.
A copy of them from clang source tree is checked into libclang/ .
If you want to an early adopter,
CXXFLAGS='-std=c++11 -fno-rtti -D_GLIBCXX_USE_CXX11_ABI=0 -g' ./waf configure --variant=cxx-debug --bundled-clang=5.0.1 --use-clang-cxx
Some clang/**/*.h are unstable and should be used with caution,
in addition, Windows pre-built binaries on https://releases.llvm.org/download.html do not include C++ header files.
Thus `--use-clang-cxx` defaults to False.
