CHANGELOG.md

Version 3.0.0 (2018-11-18)

• Refactored a lot of classes to support an overhauled Plugin API created by @weirdan
• Config allowCoercionFromStringToClassConst now defaults to false, meaning Psalm now finds a problem with this code by default:

  $a = "A";
  new $a(); // InvalidStringClass emitted
  $a = A::class;
  new $a(); // this is fine

• Disabled PHP's cycle-detecting garbage collector (which is often run unnecessarily)
• Improved docblock assertions to allow templated types e.g

  /**
   * Asserts that two variables are the same.
   *
   * @psalm-template T
   * @psalm-param T      $expected
   * @param mixed  $actual
   * @psalm-assert !=T $actual
   */
  function assertNotSame($expected, $actual) : void {}

Version 2.0.0 (2018-05-11)

• Uses PHP Parser 4 (and thus requires PHP 7)
• Issue type MoreSpecificImplementedReturnType has been renamed LessSpecificImplementedReturnType
• Issue type PossiblyUndefinedArrayOffset is triggered for possibly undefined array keys (previously bucketed into PossiblyUndefinedVariable)

  $foo = rand(0, 1) ? ['a' => 1, 'b' => 2] : ['a' => 3];
  echo $foo['b'];

• removed stopOnFirstError <psalm /> config attribute, which hasn't been used in ages
• removed UntypedParam issue type, which also hasn't been used (MissingParamType is the replacement)