llvm-project/clang/test/Analysis/initializer.cpp

// RUN: %clang_cc1 -analyze -analyzer-checker=core,debug.ExprInspection -analyzer-ipa=inlining -cfg-add-implicit-dtors -std=c++11 -verify %s

// We don't inline constructors unless we have destructors turned on.

void clang_analyzer_eval(bool);

class A {
  int x;
public:
  A();
};

A::A() : x(0) {
  clang_analyzer_eval(x == 0); // expected-warning{{TRUE}}
}


class DirectMember {
  int x;
public:
  DirectMember(int value) : x(value) {}

  int getX() { return x; }
};

void testDirectMember() {
  DirectMember obj(3);
  clang_analyzer_eval(obj.getX() == 3); // expected-warning{{TRUE}}
}


class IndirectMember {
  struct {
    int x;
  };
public:
  IndirectMember(int value) : x(value) {}

  int getX() { return x; }
};

void testIndirectMember() {
  IndirectMember obj(3);
  clang_analyzer_eval(obj.getX() == 3); // expected-warning{{TRUE}}
}


struct DelegatingConstructor {
  int x;
  DelegatingConstructor(int y) { x = y; }
  DelegatingConstructor() : DelegatingConstructor(42) {}
};

void testDelegatingConstructor() {
  DelegatingConstructor obj;
  clang_analyzer_eval(obj.x == 42); // expected-warning{{TRUE}}
}


// ------------------------------------
// False negatives
// ------------------------------------

struct RefWrapper {
  RefWrapper(int *p) : x(*p) {}
  RefWrapper(int &r) : x(r) {}
  int &x;
};

void testReferenceMember() {
  int *p = 0;
  RefWrapper X(p); // should warn in the constructor
}

void testReferenceMember2() {
  int *p = 0;
  RefWrapper X(*p); // should warn here
}