text: //// [objectTypesIdentityWithGenericCallSignaturesDifferingByConstraints2.ts]
  // Two call or construct signatures are considered identical when they have the same number of type parameters and, considering those 
  // parameters pairwise identical, have identical type parameter constraints, identical number of parameters with identical kind(required, 
  // optional or rest) and types, and identical return types.
  
  class A {
      foo<T extends U, U extends Date>(x: T, y: U): string { return null; }
  }
  
  class B<T extends U, U extends Array<number>> {
      foo(x: T, y: U): string { return null; }
  }
  
  class C<T extends U, U extends String> {
      foo(x: T, y: U): string { return null; }
  }
  
  class D<T extends U, U extends Number> {
      foo(x: T, y: U): string { return null; }
  }
  
  interface I<T extends U, U extends Number> {
      foo(x: T, y: U): string;
  }
  
  interface I2 {
      foo<T extends U, U extends Boolean>(x: T, y: U): string;
  }
  
  var a: { foo<T extends U, U extends Array<string>>(x: T, y: U): string }
  var b = { foo<T extends U, U extends RegExp>(x: T, y: U) { return ''; } };
  
  function foo1(x: A);
  function foo1(x: A); // error
  function foo1(x: any) { }
  
  function foo1b(x: B<Array<number>, Array<number>>);
  function foo1b(x: B<Array<number>, Array<number>>); // error
  function foo1b(x: any) { }
  
  function foo1c(x: C<String, String>);
  function foo1c(x: C<String, String>); // error
  function foo1c(x: any) { }
  
  function foo2(x: I<Number, Number>);
  function foo2(x: I<Number, Number>); // error
  function foo2(x: any) { }
  
  function foo3(x: typeof a);
  function foo3(x: typeof a); // error
  function foo3(x: any) { }
  
  function foo4(x: typeof b);
  function foo4(x: typeof b); // error
  function foo4(x: any) { }
  
  function foo5(x: A);
  function foo5(x: B<Array<number>, Array<number>>); // ok
  function foo5(x: any) { }
  
  function foo5b(x: A);
  function foo5b(x: C<String, String>); // ok
  function foo5b(x: any) { }
  
  function foo5c(x: C<String, String>);
  function foo5c(x: D<Number, Number>); // ok
  function foo5c(x: any) { }
  
  function foo6c(x: C<String, String>);
  function foo6c(x: D<any, Number>); // error, "any" does not satisfy the constraint
  function foo6c(x: any) { }
  
  function foo6(x: A);
  function foo6(x: I<Number, Number>); // ok
  function foo6(x: any) { }
  
  function foo7(x: A);
  function foo7(x: typeof a); // ok
  function foo7(x: any) { }
  
  function foo8(x: B<Array<number>, Array<number>>);
  function foo8(x: I<Number, Number>); // ok
  function foo8(x: any) { }
  
  function foo9(x: B<Array<number>, Array<number>>);
  function foo9(x: C<String, String>); // ok
  function foo9(x: any) { }
  
  function foo10(x: B<Array<number>, Array<number>>);
  function foo10(x: typeof a); // ok
  function foo10(x: any) { }
  
  function foo11(x: B<Array<number>, Array<number>>);
  function foo11(x: typeof b); // ok
  function foo11(x: any) { }
  
  function foo12(x: I<Number, Number>);
  function foo12(x: C<String, String>); // ok
  function foo12(x: any) { }
  
  function foo12b(x: I2);
  function foo12b(x: C<String, String>); // ok
  function foo12b(x: any) { }
  
  function foo13(x: I<Number, Number>);
  function foo13(x: typeof a); // ok
  function foo13(x: any) { }
  
  function foo14(x: I<Number, Number>);
  function foo14(x: typeof b); // ok
  function foo14(x: any) { }
  
  function foo15(x: I2);
  function foo15(x: C<String, String>); // ok
  function foo15(x: any) { }
  
  //// [objectTypesIdentityWithGenericCallSignaturesDifferingByConstraints2.js]
  // Two call or construct signatures are considered identical when they have the same number of type parameters and, considering those 
  // parameters pairwise identical, have identical type parameter constraints, identical number of parameters with identical kind(required, 
  // optional or rest) and types, and identical return types.
  var A = (function () {
      function A() {
      }
      A.prototype.foo = function (x, y) {
          return null;
      };
      return A;
  })();
  var B = (function () {
      function B() {
      }
      B.prototype.foo = function (x, y) {
          return null;
      };
      return B;
  })();
  var C = (function () {
      function C() {
      }
      C.prototype.foo = function (x, y) {
          return null;
      };
      return C;
  })();
  var D = (function () {
      function D() {
      }
      D.prototype.foo = function (x, y) {
          return null;
      };
      return D;
  })();
  var a;
  var b = { foo: function (x, y) {
      return '';
  } };
  function foo1(x) {
  }
  function foo1b(x) {
  }
  function foo1c(x) {
  }
  function foo2(x) {
  }
  function foo3(x) {
  }
  function foo4(x) {
  }
  function foo5(x) {
  }
  function foo5b(x) {
  }
  function foo5c(x) {
  }
  function foo6c(x) {
  }
  function foo6(x) {
  }
  function foo7(x) {
  }
  function foo8(x) {
  }
  function foo9(x) {
  }
  function foo10(x) {
  }
  function foo11(x) {
  }
  function foo12(x) {
  }
  function foo12b(x) {
  }
  function foo13(x) {
  }
  function foo14(x) {
  }
  function foo15(x) {
  }
  