src/llvm-project/clang-tools-extra/test/clang-tidy/checkers/readability/avoid-return-with-void-value.cpp

// RUN: %check_clang_tidy %s readability-avoid-return-with-void-value %t
// RUN: %check_clang_tidy -check-suffixes=,INCLUDE-MACROS %s readability-avoid-return-with-void-value %t \
// RUN:     -- -config="{CheckOptions: [{key: readability-avoid-return-with-void-value.IgnoreMacros, value: false}]}" \
// RUN:     --
// RUN: %check_clang_tidy -check-suffixes=LENIENT %s readability-avoid-return-with-void-value %t \
// RUN:     -- -config="{CheckOptions: [{key: readability-avoid-return-with-void-value.StrictMode, value: false}]}" \
// RUN:     --

void f1();

void f2() {
    return f1();
    // CHECK-MESSAGES: :[[@LINE-1]]:5: warning: return statement within a void function should not have a specified return value [readability-avoid-return-with-void-value]
    // CHECK-MESSAGES-LENIENT: :[[@LINE-2]]:5: warning: return statement within a void function should not have a specified return value [readability-avoid-return-with-void-value]
}

void f3(bool b) {
    if (b) return f1();
    // CHECK-MESSAGES: :[[@LINE-1]]:12: warning: return statement within a void function should not have a specified return value [readability-avoid-return-with-void-value]
    return f2();
    // CHECK-MESSAGES: :[[@LINE-1]]:5: warning: return statement within a void function should not have a specified return value [readability-avoid-return-with-void-value]
    // CHECK-MESSAGES-LENIENT: :[[@LINE-2]]:5: warning: return statement within a void function should not have a specified return value [readability-avoid-return-with-void-value]
}

template<class T>
T f4() {}

void f5() {
    return f4<void>();
    // CHECK-MESSAGES: :[[@LINE-1]]:5: warning: return statement within a void function should not have a specified return value [readability-avoid-return-with-void-value]
    // CHECK-MESSAGES-LENIENT: :[[@LINE-2]]:5: warning: return statement within a void function should not have a specified return value [readability-avoid-return-with-void-value]
}

void f6() { return; }

int f7() { return 1; }

int f8() { return f7(); }

void f9() {
    return (void)f7();
    // CHECK-MESSAGES: :[[@LINE-1]]:5: warning: return statement within a void function should not have a specified return value [readability-avoid-return-with-void-value]
    // CHECK-MESSAGES-LENIENT: :[[@LINE-2]]:5: warning: return statement within a void function should not have a specified return value [readability-avoid-return-with-void-value]
}

#define RETURN_VOID return (void)1

void f10() {
    RETURN_VOID;
    // CHECK-MESSAGES-INCLUDE-MACROS: :[[@LINE-1]]:5: warning: return statement within a void function should not have a specified return value [readability-avoid-return-with-void-value]
}

template <typename A> 
struct C {
  C(A) {}
};

template <class T> 
C<T> f11() { return {}; }

using VOID = void;

VOID f12();

VOID f13() {
    return f12();
    // CHECK-MESSAGES: :[[@LINE-1]]:5: warning: return statement within a void function should not have a specified return value [readability-avoid-return-with-void-value]
    // CHECK-MESSAGES-LENIENT: :[[@LINE-2]]:5: warning: return statement within a void function should not have a specified return value [readability-avoid-return-with-void-value]
}