llvm-project/clang-tools-extra/test/clang-tidy/readability-redundant-declaration.cpp

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

extern int Xyz;
extern int Xyz; // Xyz
// CHECK-MESSAGES: :[[@LINE-1]]:12: warning: redundant 'Xyz' declaration [readability-redundant-declaration]
// CHECK-FIXES: {{^}}// Xyz{{$}}
int Xyz = 123;

extern int A;
extern int A, B;
// CHECK-MESSAGES: :[[@LINE-1]]:12: warning: redundant 'A' declaration
// CHECK-FIXES: {{^}}extern int A, B;{{$}}

extern int Buf[10];
extern int Buf[10]; // Buf[10]
// CHECK-MESSAGES: :[[@LINE-1]]:12: warning: redundant 'Buf' declaration
// CHECK-FIXES: {{^}}// Buf[10]{{$}}

static int f();
static int f(); // f
// CHECK-MESSAGES: :[[@LINE-1]]:12: warning: redundant 'f' declaration
// CHECK-FIXES: {{^}}// f{{$}}
static int f() {}

// Original check crashed for the code below.
namespace std {
typedef decltype(sizeof(0)) size_t;
}
void *operator new(std::size_t) __attribute__((__externally_visible__));
void *operator new[](std::size_t) __attribute__((__externally_visible__));

// Don't warn about static member definition.
struct C {
  static int I;
};
int C::I;