Finalize types nodes

UPGRADING.md

@@ -723,6 +723,62 @@
     - [BC] Class `Psalm\Node\Scalar\VirtualString` became final
     - [BC] Class `Psalm\Node\Scalar\VirtualEncapsed` became final
     - [BC] Class `Psalm\Node\VirtualConst` became final
+ - Type nodes became final
+    - [BC] Class `Psalm\Type\TaintKindGroup` became final
+    - [BC] Class `Psalm\Type\Atomic\TNumericString` became final
+    - [BC] Class `Psalm\Type\Atomic\TClassStringMap` became final
+    - [BC] Class `Psalm\Type\Atomic\TEmptyNumeric` became final
+    - [BC] Class `Psalm\Type\Atomic\TCallableObject` became final
+    - [BC] Class `Psalm\Type\Atomic\TSingleLetter` became final
+    - [BC] Class `Psalm\Type\Atomic\TClosedResource` became final
+    - [BC] Class `Psalm\Type\Atomic\TIntMaskOf` became final
+    - [BC] Class `Psalm\Type\Atomic\TNonEmptyScalar` became final
+    - [BC] Class `Psalm\Type\Atomic\TLowercaseString` became final
+    - [BC] Class `Psalm\Type\Atomic\TCallable` became final
+    - [BC] Class `Psalm\Type\Atomic\TFalse` became final
+    - [BC] Class `Psalm\Type\Atomic\TIterable` became final
+    - [BC] Class `Psalm\Type\Atomic\TTraitString` became final
+    - [BC] Class `Psalm\Type\Atomic\TNonEmptyNonspecificLiteralString` became final
+    - [BC] Class `Psalm\Type\Atomic\TLiteralInt` became final
+    - [BC] Class `Psalm\Type\Atomic\TTrue` became final
+    - [BC] Class `Psalm\Type\Atomic\TDependentGetClass` became final
+    - [BC] Class `Psalm\Type\Atomic\TValueOfArray` became final
+    - [BC] Class `Psalm\Type\Atomic\TGenericObject` became final
+    - [BC] Class `Psalm\Type\Atomic\TNonEmptyLowercaseString` became final
+    - [BC] Class `Psalm\Type\Atomic\TEnumCase` became final
+    - [BC] Class `Psalm\Type\Atomic\TCallableKeyedArray` became final
+    - [BC] Class `Psalm\Type\Atomic\TDependentGetDebugType` became final
+    - [BC] Class `Psalm\Type\Atomic\TKeyOfArray` became final
+    - [BC] Class `Psalm\Type\Atomic\TNonspecificLiteralInt` became final
+    - [BC] Class `Psalm\Type\Atomic\TObjectWithProperties` became final
+    - [BC] Class `Psalm\Type\Atomic\TTemplateValueOf` became final
+    - [BC] Class `Psalm\Type\Atomic\TDependentListKey` became final
+    - [BC] Class `Psalm\Type\Atomic\TConditional` became final
+    - [BC] Class `Psalm\Type\Atomic\TIntRange` became final
+    - [BC] Class `Psalm\Type\Atomic\TCallableString` became final
+    - [BC] Class `Psalm\Type\Atomic\TClosure` became final
+    - [BC] Class `Psalm\Type\Atomic\TTypeAlias` became final
+    - [BC] Class `Psalm\Type\Atomic\TAnonymousClassInstance` became final
+    - [BC] Class `Psalm\Type\Atomic\TIntMask` became final
+    - [BC] Class `Psalm\Type\Atomic\TTemplateKeyOf` became final
+    - [BC] Class `Psalm\Type\Atomic\TDependentGetType` became final
+    - [BC] Class `Psalm\Type\Atomic\TLiteralFloat` became final
+    - [BC] Class `Psalm\Type\Atomic\TCallableArray` became final
+    - [BC] Class `Psalm\Type\Atomic\TNonEmptyMixed` became final
+    - [BC] Class `Psalm\Type\Atomic\TTemplateParamClass` became final
+    - [BC] Class `Psalm\Type\Atomic\TTemplateIndexedAccess` became final
+    - [BC] Class `Psalm\Type\Atomic\TEmptyScalar` became final
+    - [BC] Class `Psalm\Type\Atomic\TNever` became final
+    - [BC] Class `Psalm\Type\Atomic\TNull` became final
+    - [BC] Class `Psalm\Type\Atomic\TTemplateParam` became final
+    - [BC] Class `Psalm\Type\Atomic\TLiteralClassString` became final
+    - [BC] Class `Psalm\Type\Atomic\TResource` became final
+    - [BC] Class `Psalm\Type\Atomic\TVoid` became final
+    - [BC] Class `Psalm\Type\Atomic\TCallableList` became final
+    - [BC] Class `Psalm\Type\Atomic\TEmptyMixed` became final
+    - [BC] Class `Psalm\Type\Atomic\TClassConstant` became final
+    - [BC] Class `Psalm\Type\TaintKind` became final
+    - [BC] Class `Psalm\Type\Union` became final
 
 ## Removed
  - [BC] Property `Psalm\Codebase::$php_major_version` was removed, use

src/Psalm/Internal/Provider/ReturnTypeProvider/FilterVarReturnTypeProvider.php

@@ -95,7 +95,7 @@ public static function getFunctionReturnType(FunctionReturnTypeProviderEvent $ev
 
                         if (isset($atomic_type->properties['options'])
                             && $atomic_type->properties['options']->hasArray()
-                            && ($options_array = $atomic_type->properties['options']->getAtomicTypes()['array'])
+                            && ($options_array = $atomic_type->properties['options']->getAtomicTypes()['array'] ?? null)
                             && $options_array instanceof TKeyedArray
                             && isset($options_array->properties['default'])
                         ) {

src/Psalm/Type/Atomic/TAnonymousClassInstance.php

@@ -5,7 +5,7 @@
 /**
  * Denotes an anonymous class (i.e. `new class{}`) with potential methods
  */
-class TAnonymousClassInstance extends TNamedObject
+final class TAnonymousClassInstance extends TNamedObject
 {
     /**
      * @var string|null

src/Psalm/Type/Atomic/TCallable.php

@@ -7,7 +7,7 @@
 /**
  * Denotes the `callable` type. Can result from an `is_callable` check.
  */
-class TCallable extends Atomic
+final class TCallable extends Atomic
 {
     use CallableTrait;
 

src/Psalm/Type/Atomic/TCallableArray.php

@@ -5,7 +5,7 @@
 /**
  * Denotes an array that is _also_ `callable`.
  */
-class TCallableArray extends TNonEmptyArray
+final class TCallableArray extends TNonEmptyArray
 {
     /**
      * @var string

src/Psalm/Type/Atomic/TCallableKeyedArray.php

@@ -5,7 +5,7 @@
 /**
  * Denotes an object-like array that is _also_ `callable`.
  */
-class TCallableKeyedArray extends TKeyedArray
+final class TCallableKeyedArray extends TKeyedArray
 {
     public const KEY = 'callable-array';
 

src/Psalm/Type/Atomic/TCallableList.php

@@ -5,7 +5,7 @@
 /**
  * Denotes a list that is _also_ `callable`.
  */
-class TCallableList extends TNonEmptyList
+final class TCallableList extends TNonEmptyList
 {
     public const KEY = 'callable-list';
 }

src/Psalm/Type/Atomic/TCallableObject.php

@@ -5,7 +5,7 @@
 /**
  * Denotes an object that is also `callable` (i.e. it has `__invoke` defined).
  */
-class TCallableObject extends TObject
+final class TCallableObject extends TObject
 {
     public function getKey(bool $include_extra = true): string
     {

src/Psalm/Type/Atomic/TCallableString.php

@@ -5,7 +5,7 @@
 /**
  * Denotes the `callable-string` type, used to represent an unknown string that is also `callable`.
  */
-class TCallableString extends TNonFalsyString
+final class TCallableString extends TNonFalsyString
 {
 
     public function getKey(bool $include_extra = true): string

src/Psalm/Type/Atomic/TClassConstant.php

@@ -8,7 +8,7 @@
 /**
  * Denotes a class constant whose value might not yet be known.
  */
-class TClassConstant extends Atomic
+final class TClassConstant extends Atomic
 {
     /** @var string */
     public $fq_classlike_name;

src/Psalm/Type/Atomic/TClassStringMap.php

@@ -17,7 +17,7 @@
  * Represents an array where the type of each value
  * is a function of its string key value
  */
-class TClassStringMap extends Atomic
+final class TClassStringMap extends Atomic
 {
     /**
      * @var string

src/Psalm/Type/Atomic/TClosedResource.php

@@ -7,7 +7,7 @@
 /**
  * Denotes the `resource` type that has been closed (e.g. a file handle through `fclose()`).
  */
-class TClosedResource extends Atomic
+final class TClosedResource extends Atomic
 {
     public function getKey(bool $include_extra = true): string
     {

src/Psalm/Type/Atomic/TClosure.php

@@ -5,7 +5,7 @@
 /**
  * Represents a closure where we know the return type and params
  */
-class TClosure extends TNamedObject
+final class TClosure extends TNamedObject
 {
     use CallableTrait;
 

src/Psalm/Type/Atomic/TConditional.php

@@ -11,7 +11,7 @@
 /**
  * Internal representation of a conditional return type in phpdoc. For example ($param1 is int ? int : string)
  */
-class TConditional extends Atomic
+final class TConditional extends Atomic
 {
     /**
      * @var string

src/Psalm/Type/Atomic/TDependentGetClass.php

@@ -8,7 +8,7 @@
 /**
  * Represents a string whose value is a fully-qualified class found by get_class($var)
  */
-class TDependentGetClass extends TString implements DependentType
+final class TDependentGetClass extends TString implements DependentType
 {
     /**
      * Used to hold information as to what this refers to

src/Psalm/Type/Atomic/TDependentGetDebugType.php

@@ -7,7 +7,7 @@
 /**
  * Represents a string whose value is that of a type found by get_debug_type($var)
  */
-class TDependentGetDebugType extends TString implements DependentType
+final class TDependentGetDebugType extends TString implements DependentType
 {
     /**
      * Used to hold information as to what this refers to

src/Psalm/Type/Atomic/TDependentGetType.php

@@ -5,7 +5,7 @@
 /**
  * Represents a string whose value is that of a type found by gettype($var)
  */
-class TDependentGetType extends TString
+final class TDependentGetType extends TString
 {
     /**
      * Used to hold information as to what this refers to

src/Psalm/Type/Atomic/TDependentListKey.php

@@ -7,7 +7,7 @@
 /**
  * Represents a list key created from foreach ($list as $key => $value)
  */
-class TDependentListKey extends TInt implements DependentType
+final class TDependentListKey extends TInt implements DependentType
 {
     /**
      * Used to hold information as to what list variable this refers to

src/Psalm/Type/Atomic/TEmptyMixed.php

@@ -6,7 +6,7 @@
  * Denotes the `mixed` type, but empty.
  * Generated for `$x` inside the `if` statement `if (!$x) {...}` when `$x` is `mixed` outside.
  */
-class TEmptyMixed extends TMixed
+final class TEmptyMixed extends TMixed
 {
     public function getId(bool $exact = true, bool $nested = false): string
     {

src/Psalm/Type/Atomic/TEmptyNumeric.php

@@ -5,7 +5,7 @@
 /**
  * Denotes the `numeric` type that's also empty (which can also result from an `is_numeric` and `empty` check).
  */
-class TEmptyNumeric extends TNumeric
+final class TEmptyNumeric extends TNumeric
 {
     public function getId(bool $exact = true, bool $nested = false): string
     {

src/Psalm/Type/Atomic/TEmptyScalar.php

@@ -5,7 +5,7 @@
 /**
  * Denotes a `scalar` type that is also empty.
  */
-class TEmptyScalar extends TScalar
+final class TEmptyScalar extends TScalar
 {
     public function getId(bool $exact = true, bool $nested = false): string
     {

src/Psalm/Type/Atomic/TEnumCase.php

@@ -5,7 +5,7 @@
 /**
  * Denotes an enum with a specific value
  */
-class TEnumCase extends TNamedObject
+final class TEnumCase extends TNamedObject
 {
     /**
      * @var string

src/Psalm/Type/Atomic/TFalse.php

@@ -5,7 +5,7 @@
 /**
  * Denotes the `false` value type
  */
-class TFalse extends TBool
+final class TFalse extends TBool
 {
     public function getKey(bool $include_extra = true): string
     {

src/Psalm/Type/Atomic/TGenericObject.php

@@ -14,7 +14,7 @@
 /**
  * Denotes an object type that has generic parameters e.g. `ArrayObject<string, Foo\Bar>`
  */
-class TGenericObject extends TNamedObject
+final class TGenericObject extends TNamedObject
 {
     use GenericTrait;
 

src/Psalm/Type/Atomic/TIntMask.php

@@ -8,7 +8,7 @@
  * Represents the type that is the result of a bitmask combination of its parameters.
  * `int-mask<1, 2, 4>` corresponds to `0|1|2|3|4|5|6|7`
  */
-class TIntMask extends TInt
+final class TIntMask extends TInt
 {
     /** @var non-empty-array<TLiteralInt|TClassConstant> */
     public $values;

src/Psalm/Type/Atomic/TIntMaskOf.php

@@ -9,7 +9,7 @@
  * This is the same concept as TIntMask but TIntMaskOf is used with with a reference to constants in code
  * `int-mask<MyClass::CLASS_CONSTANT_*>` will corresponds to `0|1|2|3|4|5|6|7` if there are three constant 1, 2 and 4
  */
-class TIntMaskOf extends TInt
+final class TIntMaskOf extends TInt
 {
     /** @var TClassConstant|TKeyOfArray|TValueOfArray */
     public $value;

src/Psalm/Type/Atomic/TIntRange.php

@@ -8,7 +8,7 @@
 /**
  * Denotes an interval of integers between two bounds
  */
-class TIntRange extends TInt
+final class TIntRange extends TInt
 {
     public const BOUND_MIN = 'min';
     public const BOUND_MAX = 'max';

src/Psalm/Type/Atomic/TIterable.php

@@ -14,7 +14,7 @@
 /**
  * denotes the `iterable` type(which can also result from an `is_iterable` check).
  */
-class TIterable extends Atomic
+final class TIterable extends Atomic
 {
     use HasIntersectionTrait;
     use GenericTrait;

src/Psalm/Type/Atomic/TKeyOfArray.php

@@ -11,7 +11,7 @@
 /**
  * Represents an offset of an array.
  */
-class TKeyOfArray extends TArrayKey
+final class TKeyOfArray extends TArrayKey
 {
     /** @var Union */
     public $type;

src/Psalm/Type/Atomic/TLiteralClassString.php

@@ -11,7 +11,7 @@
 /**
  * Denotes a specific class string, generated by expressions like `A::class`.
  */
-class TLiteralClassString extends TLiteralString
+final class TLiteralClassString extends TLiteralString
 {
     /**
      * Whether or not this type can represent a child of the class named in $value

src/Psalm/Type/Atomic/TLiteralFloat.php

@@ -5,7 +5,7 @@
 /**
  * Denotes a floating point value where the exact numeric value is known.
  */
-class TLiteralFloat extends TFloat
+final class TLiteralFloat extends TFloat
 {
     /** @var float */
     public $value;

src/Psalm/Type/Atomic/TLiteralInt.php

@@ -5,7 +5,7 @@
 /**
  * Denotes an integer value where the exact numeric value is known.
  */
-class TLiteralInt extends TInt
+final class TLiteralInt extends TInt
 {
     /** @var int */
     public $value;

src/Psalm/Type/Atomic/TLowercaseString.php

@@ -2,7 +2,7 @@
 
 namespace Psalm\Type\Atomic;
 
-class TLowercaseString extends TString
+final class TLowercaseString extends TString
 {
     public function getId(bool $exact = true, bool $nested = false): string
     {

src/Psalm/Type/Atomic/TNever.php

@@ -8,7 +8,7 @@
  * Denotes the `no-return`/`never-return` type for functions that never return, either throwing an exception or
  * terminating (like the builtin `exit()`).
  */
-class TNever extends Atomic
+final class TNever extends Atomic
 {
     public function getKey(bool $include_extra = true): string
     {

src/Psalm/Type/Atomic/TNonEmptyLowercaseString.php

@@ -5,7 +5,7 @@
 /**
  * Denotes a non-empty-string where every character is lowercased. (which can also result from a `strtolower` call).
  */
-class TNonEmptyLowercaseString extends TNonEmptyString
+final class TNonEmptyLowercaseString extends TNonEmptyString
 {
     public function getId(bool $exact = true, bool $nested = false): string
     {

src/Psalm/Type/Atomic/TNonEmptyMixed.php

@@ -6,7 +6,7 @@
  * Denotes the `mixed` type, but not empty.
  * Generated for `$x` inside the `if` statement `if ($x) {...}` when `$x` is `mixed` outside.
  */
-class TNonEmptyMixed extends TMixed
+final class TNonEmptyMixed extends TMixed
 {
     public function getId(bool $exact = true, bool $nested = false): string
     {

src/Psalm/Type/Atomic/TNonEmptyNonspecificLiteralString.php

@@ -6,7 +6,7 @@
  * Denotes the `literal-string` type, where the exact value is unknown but
  * we know that the string is not from user input
  */
-class TNonEmptyNonspecificLiteralString extends TNonspecificLiteralString
+final class TNonEmptyNonspecificLiteralString extends TNonspecificLiteralString
 {
     public function getId(bool $exact = true, bool $nested = false): string
     {

src/Psalm/Type/Atomic/TNonEmptyScalar.php

@@ -5,7 +5,7 @@
 /**
  * Denotes a `scalar` type that is also non-empty.
  */
-class TNonEmptyScalar extends TScalar
+final class TNonEmptyScalar extends TScalar
 {
     public function getId(bool $exact = true, bool $nested = false): string
     {