[clangd] cleanup: unify the implemenation of checking a location is inside main file.

Summary: We have variant implementations in the codebase, this patch unifies them.

Reviewers: ilya-biryukov, kadircet

Subscribers: MaskRay, jkorous, arphaman, cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D64915

llvm-svn: 366541

1 files changed, 8 insertions, 0 deletions

diff --git a/clang-tools-extra/clangd/SourceCode.h b/clang-tools-extra/clangd/SourceCode.h
index 8e58e66f4db..4bbf3cf49fc 100644
--- a/clang-tools-extra/clangd/SourceCode.h
+++ b/clang-tools-extra/clangd/SourceCode.h
@@ -75,6 +75,14 @@ llvm::Optional<Range> getTokenRange(const SourceManager &SM,
 llvm::Expected<SourceLocation> sourceLocationInMainFile(const SourceManager &SM,
                                                         Position P);
 
+/// Returns true iff \p Loc is inside the main file. This function handles
+/// file & macro locations. For macro locations, returns iff the macro is being
+/// expanded inside the main file.
+///
+/// The function is usually used to check whether a declaration is inside the
+/// the main file.
+bool isInsideMainFile(SourceLocation Loc, const SourceManager &SM);
+
 /// Turns a token range into a half-open range and checks its correctness.
 /// The resulting range will have only valid source location on both sides, both
 /// of which are file locations.