TheRock/compiler/amd-llvm/clang-tools-extra/test/clang-tidy/checkers/readability/string-compare-custom-string-classes.cpp

// RUN: %check_clang_tidy %s readability-string-compare %t -- -config='{CheckOptions: {readability-string-compare.StringLikeClasses: "CustomStringTemplateBase;CustomStringNonTemplateBase"}}'
#include <string>

struct CustomStringNonTemplateBase {
  int compare(const CustomStringNonTemplateBase& Other) const {
    return 123;  // value is not important for check
  }
};

template <typename T>
struct CustomStringTemplateBase {
  int compare(const CustomStringTemplateBase& Other) const {
    return 123;
  }
};

struct CustomString1 : CustomStringNonTemplateBase {};
struct CustomString2 : CustomStringTemplateBase<char> {};

void CustomStringClasses() {
  std::string_view sv1("a");
  std::string_view sv2("b");
  if (sv1.compare(sv2)) {  // No warning - if a std class is not listed in StringLikeClasses, it won't be checked.
  }

  CustomString1 custom1;
  if (custom1.compare(custom1)) {
  }
  // CHECK-MESSAGES: [[@LINE-2]]:7: warning: do not use 'compare' to test equality of strings; use the string equality operator instead [readability-string-compare]

  CustomString2 custom2;
  if (custom2.compare(custom2)) {
  }
  // CHECK-MESSAGES: [[@LINE-2]]:7: warning: do not use 'compare' to test equality of strings; use the string equality operator instead [readability-string-compare]
}