src/third_party/llvm-project/clang-tools-extra/test/clang-tidy/Inputs/performance-unnecessary-value-param/header-fixed.h - cobalt - Git at Google

 // struct ABC is expensive to copy and should be
 // passed as a const referece.
 struct ABC {
   ABC(const ABC&);
   int get(int) const;
 };


 int f1(int n,              const ABC& v1,   const ABC& v2); // line 9

 int f1(int n, ABC v1); // line 11


 int f2(        int n,       const ABC& v2); // line 15
	// struct ABC is expensive to copy and should be
	// passed as a const referece.
	struct ABC {
	ABC(const ABC&);
	int get(int) const;
	};


	int f1(int n, const ABC& v1, const ABC& v2); // line 9

	int f1(int n, ABC v1); // line 11



	int f2( int n, const ABC& v2); // line 15