[clang] [clang][ExtractAPI] Create extractapi::RecordLocation (PR #65891)

[via cfe-commits]

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@@ -134,7 +134,48 @@ class Template {
   bool empty() const { return Parameters.empty() && Constraints.empty(); }
 };
 
-/// DocComment is a vector of RawComment::CommentLine.
+/// Slightly cut down version of PresumedLoc to suit the needs of
+/// ExtractAPI.
+class RecordLocation {
+  unsigned Line, Col;
+  std::string Filename;
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Arsenic-ATG wrote:

Due to some reasons, I am currently unable to open the original deferential revision (https://reviews.llvm.org/D157810).

So for those who are facing the same issue, It had the following review comment from @ributzka 

> There is an opportunity for optimization by avoiding the allocation of separate strings for each source location, especially since many source locations will be in the same file. As an example, APISet utilizes a BumpPtrAllocator to allocate and deduplicate strings. It is recommended to consider using the same allocator or a similar concept.

https://github.com/llvm/llvm-project/pull/65891