1// RUN: rm -rf %t
2// RUN: mkdir %t
3// RUN: cp %S/Inputs/unnecessary-value-param/header.h %t/header.h
4// RUN: %check_clang_tidy %s performance-unnecessary-value-param %t/temp -- -- -I %t
5// RUN: diff %t/header.h %S/Inputs/unnecessary-value-param/header-fixed.h
6
7#include "header.h"
8
9
10
11int f1(int n, ABC v1, ABC v2) {
12 // CHECK-MESSAGES: [[@LINE-1]]:19: warning: the parameter 'v1' is copied for each invocation but only used as a const reference; consider making it a const reference [performance-unnecessary-value-param]
13 // CHECK-MESSAGES: [[@LINE-2]]:27: warning: the parameter 'v2' is copied for each invocation but only used as a const reference; consider making it a const reference [performance-unnecessary-value-param]
14 // CHECK-FIXES: int f1(int n, const ABC& v1, const ABC& v2) {
15 return v1.get(n) + v2.get(n);
16}
17int f2(int n, ABC v2) {
18 // CHECK-MESSAGES: [[@LINE-1]]:19: warning: the parameter 'v2' is copied for each invocation but only used as a const reference; consider making it a const reference [performance-unnecessary-value-param]
19 // CHECK-FIXES: int f2(int n, const ABC& v2) {
20}
21

source code of clang-tools-extra/test/clang-tidy/checkers/performance/unnecessary-value-param-header.cpp