File: no-internal-dependencies.cpp

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// RUN: %check_clang_tidy %s abseil-no-internal-dependencies %t,  -- -- -I %S/Inputs
// RUN: clang-tidy -checks='-*, abseil-no-internal-dependencies' -header-filter='.*' %s -- -I %S/Inputs 2>&1 | FileCheck %s

#include "absl/strings/internal-file.h"
#include "absl/flags/internal-file.h"
// CHECK-NOT: warning:

#include "absl/external-file.h"
// CHECK: absl/external-file.h:6:24: warning: do not reference any 'internal' namespaces; those implementation details are reserved to Abseil [abseil-no-internal-dependencies]

void DirectAcess() {
  absl::strings_internal::InternalFunction();
  // CHECK-MESSAGES: :[[@LINE-1]]:3: warning: do not reference any 'internal' namespaces; those implementation details are reserved to Abseil

  absl::strings_internal::InternalTemplateFunction<std::string>("a");
  // CHECK-MESSAGES: :[[@LINE-1]]:3: warning: do not reference any 'internal' namespaces; those implementation details are reserved to Abseil
}

class FriendUsage {
  friend struct absl::container_internal::InternalStruct;
  // CHECK-MESSAGES: :[[@LINE-1]]:17: warning: do not reference any 'internal' namespaces; those implementation details are reserved to Abseil
};

namespace absl {
void OpeningNamespace() {
  strings_internal::InternalFunction();
  // CHECK-MESSAGES: :[[@LINE-1]]:3: warning: do not reference any 'internal' namespaces; those implementation details are reserved to Abseil
}
} // namespace absl

// should not trigger warnings
void CorrectUsage() {
  std::string Str = absl::StringsFunction("a");
  absl::SomeContainer b;
}

namespace absl {
SomeContainer b;
std::string Str = absl::StringsFunction("a");
} // namespace absl

#define USE_EXTERNAL(x) absl::strings_internal::Internal##x()

void MacroUse() {
  USE_INTERNAL(Function); // no-warning
  USE_EXTERNAL(Function);
  // CHECK-MESSAGES: :[[@LINE-5]]:25: warning: do not reference any 'internal' namespaces; those implementation details are reserved to Abseil
}

class A : absl::container_internal::InternalStruct {};
// CHECK-MESSAGES: :[[@LINE-1]]:11: warning: do not reference any 'internal' namespaces; those implementation details are reserved to Abseil

template <typename T>
class B : absl::container_internal::InternalTemplate<T> {};
// CHECK-MESSAGES: :[[@LINE-1]]:11: warning: do not reference any 'internal' namespaces; those implementation details are reserved to Abseil

template <typename T> class C : absl::container_internal::InternalTemplate<T> {
public:
  template <typename U> static C Make(U *p) { return C{}; }
};
// CHECK-MESSAGES: :[[@LINE-4]]:33: warning: do not reference any 'internal' namespaces; those implementation details are reserved to Abseil