// RUN: %check_clang_tidy %s readability-redundant-parentheses %t

void parenExpr() {
  1 + 1;
  (1 + 1);
  ((1 + 1));
  // CHECK-MESSAGES: :[[@LINE-1]]:3: warning: redundant parentheses around expression [readability-redundant-parentheses]
  // CHECK-FIXES:    (1 + 1);
  (((1 + 1)));
  // CHECK-MESSAGES: :[[@LINE-1]]:3: warning: redundant parentheses around expression [readability-redundant-parentheses]
  // CHECK-MESSAGES: :[[@LINE-2]]:4: warning: redundant parentheses around expression [readability-redundant-parentheses]
  // CHECK-FIXES:    (1 + 1);
  ((((1 + 1))));
  // CHECK-MESSAGES: :[[@LINE-1]]:3: warning: redundant parentheses around expression [readability-redundant-parentheses]
  // CHECK-MESSAGES: :[[@LINE-2]]:4: warning: redundant parentheses around expression [readability-redundant-parentheses]
  // CHECK-MESSAGES: :[[@LINE-3]]:5: warning: redundant parentheses around expression [readability-redundant-parentheses]
  // CHECK-FIXES:    (1 + 1);
}

#define EXP (1 + 1)
#define PAREN(e) (e)
void parenExprWithMacro() {
  EXP; // 1
  (EXP); // 2
  ((EXP)); // 3
  // CHECK-MESSAGES: :[[@LINE-1]]:3: warning: redundant parentheses around expression [readability-redundant-parentheses]
  // CHECK-FIXES:    (EXP); // 3
  PAREN((1));
}

void constant() {
  (1);
  // CHECK-MESSAGES: :[[@LINE-1]]:3: warning: redundant parentheses around expression [readability-redundant-parentheses]
  // CHECK-FIXES:    1;
  (1.0);
  // CHECK-MESSAGES: :[[@LINE-1]]:3: warning: redundant parentheses around expression [readability-redundant-parentheses]
  // CHECK-FIXES:    1.0;
  (true);
  // CHECK-MESSAGES: :[[@LINE-1]]:3: warning: redundant parentheses around expression [readability-redundant-parentheses]
  // CHECK-FIXES:    true;
  (',');
  // CHECK-MESSAGES: :[[@LINE-1]]:3: warning: redundant parentheses around expression [readability-redundant-parentheses]
  // CHECK-FIXES:    ',';
  ("v4");
  // CHECK-MESSAGES: :[[@LINE-1]]:3: warning: redundant parentheses around expression [readability-redundant-parentheses]
  // CHECK-FIXES:    "v4";
  (nullptr);
  // CHECK-MESSAGES: :[[@LINE-1]]:3: warning: redundant parentheses around expression [readability-redundant-parentheses]
  // CHECK-FIXES:    nullptr;
}

void declRefExpr(int a) {
  (a);
  // CHECK-MESSAGES: :[[@LINE-1]]:3: warning: redundant parentheses around expression [readability-redundant-parentheses]
  // CHECK-FIXES:    a;
}

void exceptions() {
  sizeof(1);
  alignof(2);
  alignof((3));
  // CHECK-MESSAGES: :[[@LINE-1]]:11: warning: redundant parentheses around expression [readability-redundant-parentheses]
  // CHECK-FIXES:    alignof(3);
}

namespace std {
  template<class T> T max(T, T);
  template<class T> T min(T, T);
} // namespace std
void ignoreStdMaxMin() {
  (std::max)(1,2);
  (std::min)(1,2);
}

struct Foo
{
  bool x;
  struct Y {
    bool z;
  } y;
  void foo()
  {
   if ((x)) {
     // CHECK-MESSAGES: :[[@LINE-1]]:8: warning: redundant parentheses around expression [readability-redundant-parentheses]
     // CHECK-FIXES:    if (x) {
   }
   if((this->x)) {
     // CHECK-MESSAGES: :[[@LINE-1]]:7: warning: redundant parentheses around expression [readability-redundant-parentheses]
     // CHECK-FIXES:    if(this->x) {
   }
  }
  bool bar() {
    return true;
  }

  Y fooBar() {
    Y y{};
    return y;
  }
};

void memberExpr() {
  Foo foo{};
  if ((foo.x)) {
   // CHECK-MESSAGES: :[[@LINE-1]]:7: warning: redundant parentheses around expression [readability-redundant-parentheses]
   // CHECK-FIXES:    if (foo.x) {
  }

  if ((foo.y.z)) {
   // CHECK-MESSAGES: :[[@LINE-1]]:7: warning: redundant parentheses around expression [readability-redundant-parentheses]
   // CHECK-FIXES:    if (foo.y.z) {
  }

  if ((foo.bar())) {
   // CHECK-MESSAGES: :[[@LINE-1]]:7: warning: redundant parentheses around expression [readability-redundant-parentheses]
   // CHECK-FIXES:    if (foo.bar()) {
  }

  if ((foo.fooBar().z)) {
   // CHECK-MESSAGES: :[[@LINE-1]]:7: warning: redundant parentheses around expression [readability-redundant-parentheses]
   // CHECK-FIXES:    if (foo.fooBar().z) {
  }
}

enum class FoldLevel {
  None = 0x0,
  HeaderFlag = 0x2000,
};

int FoldLevelToInt(FoldLevel l) {
  return static_cast<int>(l);
}

constexpr FoldLevel operator&(FoldLevel lhs, FoldLevel rhs) {
  return static_cast<FoldLevel>(static_cast<int>(lhs) & static_cast<int>(rhs));
}

constexpr FoldLevel operator*(FoldLevel lhs, FoldLevel rhs) {
  return static_cast<FoldLevel>(static_cast<int>(lhs) * static_cast<int>(rhs));
}

constexpr FoldLevel operator!(FoldLevel operand) {
  return static_cast<FoldLevel>(!static_cast<int>(operand));
}


constexpr FoldLevel operator+(FoldLevel lhs, FoldLevel rhs) {
  return lhs;
}

constexpr bool UseOperatorAmpersand1(FoldLevel level) {
  return (level & FoldLevel::HeaderFlag) != FoldLevel::None;
}

constexpr bool UseOperatorAmpersand2(FoldLevel level) {
  const FoldLevel l = level & FoldLevel::HeaderFlag;
  return (l != FoldLevel::None);
}

constexpr bool UseOperatorAmpersand3(FoldLevel level) {
  return ((level & FoldLevel::HeaderFlag) != FoldLevel::None);
}

constexpr bool UseOperatorAmpersand4(FoldLevel level) {
  return FoldLevel::None != (level & FoldLevel::HeaderFlag);
}

constexpr bool UseOperatorAmpersand5(FoldLevel level) {
  FoldLevel hf = FoldLevel::HeaderFlag;
  // currently this check doesn't take into account order of operations, so the
  // parentheses around `left & rhs` is needed
  return ((level & hf) * hf) != FoldLevel::None;
}

constexpr bool UseOperatorAmpersand6(FoldLevel level) {
  FoldLevel hf = FoldLevel::HeaderFlag;
  return (!(level & hf) * hf) != FoldLevel::None;
}

constexpr FoldLevel UseOperatorAmpersand7(FoldLevel level) {
  FoldLevel hf = FoldLevel::HeaderFlag;
  return !(level & hf) * hf;
}

constexpr FoldLevel UseOperatorAmpersand8(FoldLevel level) {
  FoldLevel hf = FoldLevel::HeaderFlag;
  return hf * !(level & hf);
}

constexpr FoldLevel UseOperatorAmpersand9(FoldLevel level) {
  FoldLevel hf = FoldLevel::HeaderFlag;
  return !(level & hf);
}

constexpr bool UseOperatorPlus1(FoldLevel level) {
  return (FoldLevelToInt(level + FoldLevel::None)) != 1;
  // CHECK-MESSAGES: :[[@LINE-1]]:10: warning: redundant parentheses around expression [readability-redundant-parentheses]
  // CHECK-FIXES:    return FoldLevelToInt(level + FoldLevel::None) != 1;
}

constexpr bool UseOperatorPlus2(FoldLevel level) {
  return (FoldLevelToInt(!(level + FoldLevel::None))) != 1;
  // CHECK-MESSAGES: :[[@LINE-1]]:10: warning: redundant parentheses around expression [readability-redundant-parentheses]
  // CHECK-FIXES:    return FoldLevelToInt(!(level + FoldLevel::None)) != 1;
}


const int bracket_int_plus_num = (4) + 5;
// CHECK-MESSAGES: :[[@LINE-1]]:34: warning: redundant parentheses around expression [readability-redundant-parentheses]
// CHECK-FIXES:    const int bracket_int_plus_num = 4 + 5;