[Clang] Added method getTokenLocations to StringLiteral

[njames93]

Summary

Adds a helper method ArrayRef<SourceLocation> getTokenLocations() const to clang::StringLiteral for easier analysis on the pieces that make up a string.

[merge_guards_bot]

Unit tests: pass. 62255 tests passed, 0 failed and 827 were skipped.

clang-tidy: pass.

clang-format: pass.

Build artifacts: diff.json, clang-tidy.txt, clang-format.patch, CMakeCache.txt, console-log.txt, test-results.xml

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[njames93]

Ping??

clang/include/clang/AST/Expr.h

public:
   tokloc_iterator tokloc_begin() const {
     return getTrailingObjects<SourceLocation>();
   }
 
   tokloc_iterator tokloc_end() const {
     return getTrailingObjects<SourceLocation>() + getNumConcatenated();
   }
 
+  /// Gets the source location of each piece that makes up this string literal.
+  ArrayRef<SourceLocation> getTokenLocations() const {
+    return {getTrailingObjects<SourceLocation>(), getNumConcatenated()};
+  }
+
   SourceLocation getBeginLoc() const LLVM_READONLY { return *tokloc_begin(); }
   SourceLocation getEndLoc() const LLVM_READONLY { return *(tokloc_end() - 1); }
 
   static bool classof(const Stmt *T) {
     return T->getStmtClass() == StringLiteralClass;
   }
 
   // Iterators