|  | // RUN: %check_clang_tidy -std=c++17-or-later %s modernize-use-nodiscard %t | 
|  |  | 
|  | class Foo | 
|  | { | 
|  | public: | 
|  | bool f1() const; | 
|  | // CHECK-MESSAGES: :[[@LINE-1]]:5: warning: function 'f1' should be marked {{\[\[nodiscard\]\]}} [modernize-use-nodiscard] | 
|  | // CHECK-FIXES: {{\[\[nodiscard\]\]}} bool f1() const; | 
|  |  | 
|  | bool f2(int) const; | 
|  | // CHECK-MESSAGES: :[[@LINE-1]]:5: warning: function 'f2' should be marked {{\[\[nodiscard\]\]}} [modernize-use-nodiscard] | 
|  | // CHECK-FIXES: {{\[\[nodiscard\]\]}} bool f2(int) const; | 
|  |  | 
|  | bool f3(const int &) const; | 
|  | // CHECK-MESSAGES: :[[@LINE-1]]:5: warning: function 'f3' should be marked {{\[\[nodiscard\]\]}} [modernize-use-nodiscard] | 
|  | // CHECK-FIXES: {{\[\[nodiscard\]\]}} bool f3(const int &) const; | 
|  |  | 
|  | bool f4(void) const; | 
|  | // CHECK-MESSAGES: :[[@LINE-1]]:5: warning: function 'f4' should be marked {{\[\[nodiscard\]\]}} [modernize-use-nodiscard] | 
|  | // CHECK-FIXES: {{\[\[nodiscard\]\]}} bool f4(void) const; | 
|  |  | 
|  | }; |