codeql/cpp/ql/test/query-tests/Best Practices/Hiding/DeclarationHidesVariable/hiding.cpp

// semmle-extractor-options: -std=c++17
void f(void) {
    if (1) {
        int i;

        for(int i = 1; i < 10; i++) { // BAD
            ;
        }
    }
}

namespace foo {
  namespace bar {
    void f2(int i) {
      int k;
      try {
        for (i = 0; i < 3; i++) {
          int k; // BAD
        }
      }
      catch (int e) {
      }
    }
  }
}

void nestedRangeBasedFor() {
  int xs[4], ys[4];
  for (auto x : xs)
    for (auto y : ys) // GOOD
      x = y = 0;
}

void structuredBinding() {
  int xs[1] = {1};
  auto [x] = xs;
  {
    auto [x] = xs; // BAD
    auto [y] = xs; // GOOD
  }
}