mirror of
https://github.com/danog/psalm.git
synced 2024-12-04 18:48:03 +01:00
1051 lines
30 KiB
PHP
1051 lines
30 KiB
PHP
<?php
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namespace Psalm;
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use Psalm\Exception\TypeParseTreeException;
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use Psalm\Storage\FunctionLikeParameter;
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use Psalm\Type\Atomic;
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use Psalm\Type\Atomic\ObjectLike;
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use Psalm\Type\Atomic\TArray;
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use Psalm\Type\Atomic\TBool;
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use Psalm\Type\Atomic\TCallable;
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use Psalm\Type\Atomic\TClassString;
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use Psalm\Type\Atomic\TEmpty;
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use Psalm\Type\Atomic\TFalse;
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use Psalm\Type\Atomic\TFloat;
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use Psalm\Type\Atomic\TGenericObject;
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use Psalm\Type\Atomic\TGenericParam;
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use Psalm\Type\Atomic\TInt;
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use Psalm\Type\Atomic\TLiteralClassString;
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use Psalm\Type\Atomic\TLiteralFloat;
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use Psalm\Type\Atomic\TLiteralInt;
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use Psalm\Type\Atomic\TLiteralString;
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use Psalm\Type\Atomic\TMixed;
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use Psalm\Type\Atomic\TNamedObject;
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use Psalm\Type\Atomic\TNull;
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use Psalm\Type\Atomic\TNumeric;
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use Psalm\Type\Atomic\TObject;
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use Psalm\Type\Atomic\TResource;
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use Psalm\Type\Atomic\TSingleLetter;
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use Psalm\Type\Atomic\TString;
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use Psalm\Type\Atomic\TTrue;
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use Psalm\Type\Atomic\TVoid;
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use Psalm\Internal\Type\ParseTree;
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use Psalm\Internal\Type\TypeCombination;
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use Psalm\Type\Union;
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abstract class Type
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{
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/**
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* @var array<string, bool>
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*/
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public static $PSALM_RESERVED_WORDS = [
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'int' => true,
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'string' => true,
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'float' => true,
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'bool' => true,
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'false' => true,
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'true' => true,
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'object' => true,
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'empty' => true,
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'callable' => true,
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'array' => true,
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'iterable' => true,
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'null' => true,
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'mixed' => true,
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'numeric-string' => true,
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'class-string' => true,
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'mysql-escaped-string' => true,
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'html-escaped-string' => true,
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'boolean' => true,
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'integer' => true,
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'double' => true,
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'real' => true,
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'resource' => true,
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'void' => true,
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'self' => true,
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'static' => true,
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'scalar' => true,
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'numeric' => true,
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'no-return' => true,
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'never-return' => true,
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'never-returns' => true,
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];
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/**
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* @var array<string, array<int, string>>
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*/
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private static $memoized_tokens = [];
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/**
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* Parses a string type representation
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*
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* @param string $type_string
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* @param bool $php_compatible
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* @param array<string, string> $template_type_map
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*
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* @return Union
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*/
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public static function parseString(
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$type_string,
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$php_compatible = false,
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array $template_type_map = []
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) {
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return self::parseTokens(self::tokenize($type_string), $php_compatible, $template_type_map);
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}
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/**
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* Parses a string type representation
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*
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* @param array<int, string> $type_tokens
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* @param bool $php_compatible
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* @param array<string, string> $template_type_map
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*
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* @return Union
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*/
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public static function parseTokens(
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array $type_tokens,
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$php_compatible = false,
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array $template_type_map = []
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) {
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if (count($type_tokens) === 1) {
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$only_token = $type_tokens[0];
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// Note: valid identifiers can include class names or $this
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if (!preg_match('@^(\$this|\\\\?[a-zA-Z_\x7f-\xff][\\\\\-0-9a-zA-Z_\x7f-\xff]*)$@', $only_token)) {
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throw new TypeParseTreeException("Invalid type '$only_token'");
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}
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$only_token = self::fixScalarTerms($only_token, $php_compatible);
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return new Union([Atomic::create($only_token, $php_compatible, $template_type_map)]);
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}
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try {
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$parse_tree = ParseTree::createFromTokens($type_tokens);
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$parsed_type = self::getTypeFromTree($parse_tree, $php_compatible, $template_type_map);
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} catch (TypeParseTreeException $e) {
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throw $e;
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}
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if (!($parsed_type instanceof Union)) {
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$parsed_type = new Union([$parsed_type]);
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}
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return $parsed_type;
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}
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/**
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* @param string $type_string
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* @param bool $php_compatible
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*
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* @return string
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*/
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private static function fixScalarTerms($type_string, $php_compatible = false)
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{
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$type_string_lc = strtolower($type_string);
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switch ($type_string_lc) {
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case 'int':
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case 'void':
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case 'float':
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case 'string':
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case 'bool':
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case 'callable':
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case 'iterable':
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case 'array':
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case 'object':
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case 'numeric':
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case 'true':
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case 'false':
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case 'null':
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case 'mixed':
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case 'resource':
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return $type_string_lc;
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}
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switch ($type_string) {
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case 'boolean':
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return $php_compatible ? $type_string : 'bool';
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case 'integer':
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return $php_compatible ? $type_string : 'int';
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case 'double':
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case 'real':
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return $php_compatible ? $type_string : 'float';
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}
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return $type_string;
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}
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/**
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* @param ParseTree $parse_tree
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* @param bool $php_compatible
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* @param array<string, string> $template_type_map
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*
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* @return Atomic|TArray|TGenericObject|ObjectLike|Union
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*/
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public static function getTypeFromTree(
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ParseTree $parse_tree,
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$php_compatible = false,
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array $template_type_map = []
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) {
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if ($parse_tree instanceof ParseTree\GenericTree) {
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$generic_type = $parse_tree->value;
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$generic_params = array_map(
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/**
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* @return Union
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*/
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function (ParseTree $child_tree) use ($template_type_map) {
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$tree_type = self::getTypeFromTree($child_tree, false, $template_type_map);
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return $tree_type instanceof Union ? $tree_type : new Union([$tree_type]);
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},
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$parse_tree->children
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);
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$generic_type_value = self::fixScalarTerms($generic_type, false);
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if (($generic_type_value === 'array'
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|| $generic_type_value === 'Generator'
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|| $generic_type_value === 'iterable')
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&& count($generic_params) === 1
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) {
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array_unshift($generic_params, new Union([new TMixed]));
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}
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if (!$generic_params) {
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throw new \InvalidArgumentException('No generic params provided for type');
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}
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if ($generic_type_value === 'array') {
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return new TArray($generic_params);
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}
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if ($generic_type_value === 'class-string') {
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$class_name = (string) $generic_params[0];
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if (isset($template_type_map[$class_name])) {
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return new Atomic\TGenericParamClass($class_name);
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}
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return new TClassString($class_name);
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}
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return new TGenericObject($generic_type_value, $generic_params);
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}
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if ($parse_tree instanceof ParseTree\UnionTree) {
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$has_null = false;
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$atomic_types = [];
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foreach ($parse_tree->children as $child_tree) {
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if ($child_tree instanceof ParseTree\NullableTree) {
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$atomic_type = self::getTypeFromTree($child_tree->children[0], false, $template_type_map);
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$has_null = true;
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} else {
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$atomic_type = self::getTypeFromTree($child_tree, false, $template_type_map);
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}
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if ($atomic_type instanceof Union) {
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foreach ($atomic_type->getTypes() as $type) {
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$atomic_types[] = $type;
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}
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continue;
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}
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$atomic_types[] = $atomic_type;
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}
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if ($has_null) {
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$atomic_types[] = new TNull;
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}
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return TypeCombination::combineTypes($atomic_types);
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}
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if ($parse_tree instanceof ParseTree\IntersectionTree) {
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$intersection_types = array_map(
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/**
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* @return Atomic
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*/
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function (ParseTree $child_tree) use ($template_type_map) {
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$atomic_type = self::getTypeFromTree($child_tree, false, $template_type_map);
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if (!$atomic_type instanceof Atomic) {
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throw new TypeParseTreeException(
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'Intersection types cannot contain unions'
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);
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}
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return $atomic_type;
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},
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$parse_tree->children
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);
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foreach ($intersection_types as $intersection_type) {
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if (!$intersection_type instanceof TNamedObject
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&& !$intersection_type instanceof TGenericParam
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) {
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throw new TypeParseTreeException('Intersection types must all be objects');
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}
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}
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/** @var TNamedObject|TGenericParam */
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$first_type = array_shift($intersection_types);
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/** @var array<int, TNamedObject|TGenericParam> $intersection_types */
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$first_type->extra_types = $intersection_types;
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return $first_type;
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}
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if ($parse_tree instanceof ParseTree\ObjectLikeTree) {
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$properties = [];
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$type = $parse_tree->value;
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foreach ($parse_tree->children as $i => $property_branch) {
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if (!$property_branch instanceof ParseTree\ObjectLikePropertyTree) {
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$property_type = self::getTypeFromTree($property_branch, false, $template_type_map);
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$property_maybe_undefined = false;
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$property_key = (string)$i;
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} elseif (count($property_branch->children) === 1) {
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$property_type = self::getTypeFromTree($property_branch->children[0], false, $template_type_map);
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$property_maybe_undefined = $property_branch->possibly_undefined;
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$property_key = $property_branch->value;
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} else {
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throw new \InvalidArgumentException(
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'Unexpected number of property parts (' . count($property_branch->children) . ')'
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);
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}
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if (!$property_type instanceof Union) {
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$property_type = new Union([$property_type]);
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}
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if ($property_maybe_undefined) {
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$property_type->possibly_undefined = true;
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}
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$properties[$property_key] = $property_type;
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}
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if ($type !== 'array') {
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throw new TypeParseTreeException('Unexpected brace character');
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}
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if (!$properties) {
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throw new \InvalidArgumentException('No properties supplied for ObjectLike');
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}
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return new ObjectLike($properties);
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}
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if ($parse_tree instanceof ParseTree\CallableWithReturnTypeTree) {
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$callable_type = self::getTypeFromTree($parse_tree->children[0], false, $template_type_map);
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if (!$callable_type instanceof TCallable && !$callable_type instanceof Type\Atomic\Fn) {
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throw new \InvalidArgumentException('Parsing callable tree node should return TCallable');
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}
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if (!isset($parse_tree->children[1])) {
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throw new TypeParseTreeException('Invalid return type');
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}
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$return_type = self::getTypeFromTree($parse_tree->children[1], false, $template_type_map);
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$callable_type->return_type = $return_type instanceof Union ? $return_type : new Union([$return_type]);
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return $callable_type;
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}
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if ($parse_tree instanceof ParseTree\CallableTree) {
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$params = array_map(
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/**
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* @return FunctionLikeParameter
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*/
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function (ParseTree $child_tree) use ($template_type_map) {
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$is_variadic = false;
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$is_optional = false;
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if ($child_tree instanceof ParseTree\CallableParamTree) {
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$tree_type = self::getTypeFromTree($child_tree->children[0], false, $template_type_map);
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$is_variadic = $child_tree->variadic;
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$is_optional = $child_tree->has_default;
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} else {
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$tree_type = self::getTypeFromTree($child_tree, false, $template_type_map);
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}
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$tree_type = $tree_type instanceof Union ? $tree_type : new Union([$tree_type]);
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return new FunctionLikeParameter(
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'',
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false,
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$tree_type,
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null,
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null,
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$is_optional,
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false,
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$is_variadic
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);
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},
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$parse_tree->children
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);
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if (in_array(strtolower($parse_tree->value), ['closure', '\closure'], true)) {
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return new Type\Atomic\Fn('Closure', $params);
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}
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return new TCallable($parse_tree->value, $params);
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}
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if ($parse_tree instanceof ParseTree\EncapsulationTree) {
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return self::getTypeFromTree($parse_tree->children[0], false, $template_type_map);
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}
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if ($parse_tree instanceof ParseTree\NullableTree) {
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$non_nullable_type = self::getTypeFromTree($parse_tree->children[0], false, $template_type_map);
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if ($non_nullable_type instanceof Union) {
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$non_nullable_type->addType(new TNull);
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return $non_nullable_type;
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}
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if ($non_nullable_type instanceof Atomic) {
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return TypeCombination::combineTypes([
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new TNull,
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$non_nullable_type
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]);
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}
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throw new \UnexpectedValueException(
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'Was expecting an atomic or union type, got ' . get_class($non_nullable_type)
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);
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}
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if ($parse_tree instanceof ParseTree\MethodTree
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|| $parse_tree instanceof ParseTree\MethodWithReturnTypeTree
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) {
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throw new TypeParseTreeException('Misplaced brackets');
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}
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if (!$parse_tree instanceof ParseTree\Value) {
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throw new \InvalidArgumentException('Unrecognised parse tree type ' . get_class($parse_tree));
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}
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if ($parse_tree->value[0] === '"' || $parse_tree->value[0] === '\'') {
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return new TLiteralString(substr($parse_tree->value, 1, -1));
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}
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if (strpos($parse_tree->value, '::')) {
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list($fq_classlike_name, $const_name) = explode('::', $parse_tree->value);
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if (isset($template_type_map[$fq_classlike_name]) && $const_name === 'class') {
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return new Atomic\TGenericParamClass($fq_classlike_name);
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}
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if ($const_name === 'class') {
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return new Atomic\TLiteralClassString($fq_classlike_name);
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}
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return new Atomic\TScalarClassConstant($fq_classlike_name, $const_name);
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}
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if (preg_match('/^\-?(0|[1-9][0-9]*)$/', $parse_tree->value)) {
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return new TLiteralInt((int) $parse_tree->value);
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}
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if (!preg_match('@^(\$this|\\\\?[a-zA-Z_\x7f-\xff][\\\\\-0-9a-zA-Z_\x7f-\xff]*)$@', $parse_tree->value)) {
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throw new TypeParseTreeException('Invalid type \'' . $parse_tree->value . '\'');
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}
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$atomic_type = self::fixScalarTerms($parse_tree->value, $php_compatible);
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return Atomic::create($atomic_type, $php_compatible, $template_type_map);
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}
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/**
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* @param string $string_type
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* @param bool $ignore_space
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*
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* @return array<int,string>
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*/
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public static function tokenize($string_type, $ignore_space = true)
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{
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$type_tokens = [''];
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$was_char = false;
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$quote_char = null;
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$escaped = false;
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if (isset(self::$memoized_tokens[$string_type])) {
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return self::$memoized_tokens[$string_type];
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}
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// index of last type token
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$rtc = 0;
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$chars = str_split($string_type);
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for ($i = 0, $c = count($chars); $i < $c; ++$i) {
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$char = $chars[$i];
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if (!$quote_char && $char === ' ' && $ignore_space) {
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continue;
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}
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if ($was_char) {
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$type_tokens[++$rtc] = '';
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}
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if ($quote_char) {
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if ($char === $quote_char && $i > 1 && !$escaped) {
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$quote_char = null;
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$type_tokens[$rtc] .= $char;
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$was_char = true;
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continue;
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}
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$was_char = false;
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if ($char === '\\'
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&& !$escaped
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&& $i < $c - 1
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&& ($chars[$i + 1] === $quote_char || $chars[$i + 1] === '\\')
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) {
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$escaped = true;
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continue;
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}
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$escaped = false;
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$type_tokens[$rtc] .= $char;
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continue;
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}
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if ($char === '"' || $char === '\'') {
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if ($type_tokens[$rtc] === '') {
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$type_tokens[$rtc] = $char;
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} else {
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$type_tokens[++$rtc] = $char;
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}
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$quote_char = $char;
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$was_char = false;
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continue;
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}
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if ($char === '<'
|
|
|| $char === '>'
|
|
|| $char === '|'
|
|
|| $char === '?'
|
|
|| $char === ','
|
|
|| $char === '{'
|
|
|| $char === '}'
|
|
|| $char === '['
|
|
|| $char === ']'
|
|
|| $char === '('
|
|
|| $char === ')'
|
|
|| $char === ' '
|
|
|| $char === '&'
|
|
|| $char === '='
|
|
) {
|
|
if ($type_tokens[$rtc] === '') {
|
|
$type_tokens[$rtc] = $char;
|
|
} else {
|
|
$type_tokens[++$rtc] = $char;
|
|
}
|
|
|
|
$was_char = true;
|
|
|
|
continue;
|
|
}
|
|
|
|
if ($char === ':') {
|
|
if ($i + 1 < $c && $chars[$i + 1] === ':') {
|
|
if ($type_tokens[$rtc] === '') {
|
|
$type_tokens[$rtc] = '::';
|
|
} else {
|
|
$type_tokens[++$rtc] = '::';
|
|
}
|
|
|
|
$was_char = true;
|
|
|
|
$i++;
|
|
|
|
continue;
|
|
}
|
|
|
|
if ($type_tokens[$rtc] === '') {
|
|
$type_tokens[$rtc] = ':';
|
|
} else {
|
|
$type_tokens[++$rtc] = ':';
|
|
}
|
|
|
|
$was_char = true;
|
|
|
|
continue;
|
|
}
|
|
|
|
if ($char === '.') {
|
|
if ($i + 2 > $c || $chars[$i + 1] !== '.' || $chars[$i + 2] !== '.') {
|
|
throw new TypeParseTreeException('Unexpected token ' . $char);
|
|
}
|
|
|
|
if ($type_tokens[$rtc] === '') {
|
|
$type_tokens[$rtc] = '...';
|
|
} else {
|
|
$type_tokens[++$rtc] = '...';
|
|
}
|
|
|
|
$was_char = true;
|
|
|
|
$i += 2;
|
|
|
|
continue;
|
|
}
|
|
|
|
$type_tokens[$rtc] .= $char;
|
|
$was_char = false;
|
|
}
|
|
|
|
self::$memoized_tokens[$string_type] = $type_tokens;
|
|
|
|
return $type_tokens;
|
|
}
|
|
|
|
/**
|
|
* @param string $string_type
|
|
* @param Aliases $aliases
|
|
* @param array<string, string>|null $template_type_map
|
|
* @param array<string, array<int, string>>|null $type_aliases
|
|
*
|
|
* @return array<int, string>
|
|
*/
|
|
public static function fixUpLocalType(
|
|
$string_type,
|
|
Aliases $aliases,
|
|
array $template_type_map = null,
|
|
array $type_aliases = null
|
|
) {
|
|
$type_tokens = self::tokenize($string_type);
|
|
|
|
for ($i = 0, $l = count($type_tokens); $i < $l; $i++) {
|
|
$string_type_token = $type_tokens[$i];
|
|
|
|
if (in_array(
|
|
$string_type_token,
|
|
['<', '>', '|', '?', ',', '{', '}', ':', '::', '[', ']', '(', ')', '&'],
|
|
true
|
|
)) {
|
|
continue;
|
|
}
|
|
|
|
if ($string_type_token[0] === '"'
|
|
|| $string_type_token[0] === '\''
|
|
|| $string_type_token === '0'
|
|
|| preg_match('/[1-9]/', $string_type_token[0])
|
|
) {
|
|
continue;
|
|
}
|
|
|
|
if (isset($type_tokens[$i + 1]) && $type_tokens[$i + 1] === ':') {
|
|
continue;
|
|
}
|
|
|
|
if ($i > 0 && $type_tokens[$i - 1] === '::') {
|
|
continue;
|
|
}
|
|
|
|
$type_tokens[$i] = $string_type_token = self::fixScalarTerms($string_type_token);
|
|
|
|
if (isset(self::$PSALM_RESERVED_WORDS[$string_type_token])) {
|
|
continue;
|
|
}
|
|
|
|
if (isset($template_type_map[$string_type_token])) {
|
|
continue;
|
|
}
|
|
|
|
if (isset($type_tokens[$i + 1])) {
|
|
$next_char = $type_tokens[$i + 1];
|
|
if ($next_char === ':') {
|
|
continue;
|
|
}
|
|
|
|
if ($next_char === '?' && isset($type_tokens[$i + 2]) && $type_tokens[$i + 2] === ':') {
|
|
continue;
|
|
}
|
|
}
|
|
|
|
if ($string_type_token[0] === '$') {
|
|
continue;
|
|
}
|
|
|
|
if (isset($type_aliases[$string_type_token])) {
|
|
$replacement_tokens = $type_aliases[$string_type_token];
|
|
|
|
array_unshift($replacement_tokens, '(');
|
|
array_push($replacement_tokens, ')');
|
|
|
|
$diff = count($replacement_tokens) - 1;
|
|
|
|
array_splice($type_tokens, $i, 1, $replacement_tokens);
|
|
|
|
$i += $diff;
|
|
$l += $diff;
|
|
} else {
|
|
$type_tokens[$i] = self::getFQCLNFromString(
|
|
$string_type_token,
|
|
$aliases
|
|
);
|
|
}
|
|
}
|
|
|
|
return $type_tokens;
|
|
}
|
|
|
|
/**
|
|
* @param string $class
|
|
* @param Aliases $aliases
|
|
*
|
|
* @return string
|
|
*/
|
|
public static function getFQCLNFromString($class, Aliases $aliases)
|
|
{
|
|
if ($class === '') {
|
|
throw new \InvalidArgumentException('$class cannot be empty');
|
|
}
|
|
|
|
if ($class[0] === '\\') {
|
|
return substr($class, 1);
|
|
}
|
|
|
|
$imported_namespaces = $aliases->uses;
|
|
|
|
if (strpos($class, '\\') !== false) {
|
|
$class_parts = explode('\\', $class);
|
|
$first_namespace = array_shift($class_parts);
|
|
|
|
if (isset($imported_namespaces[strtolower($first_namespace)])) {
|
|
return $imported_namespaces[strtolower($first_namespace)] . '\\' . implode('\\', $class_parts);
|
|
}
|
|
} elseif (isset($imported_namespaces[strtolower($class)])) {
|
|
return $imported_namespaces[strtolower($class)];
|
|
}
|
|
|
|
$namespace = $aliases->namespace;
|
|
|
|
return ($namespace ? $namespace . '\\' : '') . $class;
|
|
}
|
|
|
|
/**
|
|
* @param bool $from_calculation
|
|
* @param int|null $value
|
|
*
|
|
* @return Type\Union
|
|
*/
|
|
public static function getInt($from_calculation = false, $value = null)
|
|
{
|
|
if ($value !== null) {
|
|
$union = new Union([new TLiteralInt($value)]);
|
|
} else {
|
|
$union = new Union([new TInt()]);
|
|
}
|
|
|
|
$union->from_calculation = $from_calculation;
|
|
|
|
return $union;
|
|
}
|
|
|
|
/**
|
|
* @return Type\Union
|
|
*/
|
|
public static function getNumeric()
|
|
{
|
|
$type = new TNumeric;
|
|
|
|
return new Union([$type]);
|
|
}
|
|
|
|
/**
|
|
* @param string|null $value
|
|
*
|
|
* @return Type\Union
|
|
*/
|
|
public static function getString($value = null)
|
|
{
|
|
if ($value !== null) {
|
|
$type = new TLiteralString($value);
|
|
} else {
|
|
$type = new TString();
|
|
}
|
|
|
|
return new Union([$type]);
|
|
}
|
|
|
|
/**
|
|
* @return Type\Union
|
|
*/
|
|
public static function getSingleLetter()
|
|
{
|
|
$type = new TSingleLetter;
|
|
|
|
return new Union([$type]);
|
|
}
|
|
|
|
/**
|
|
* @param string $extends
|
|
*
|
|
* @return Type\Union
|
|
*/
|
|
public static function getClassString($extends = 'object')
|
|
{
|
|
return new Union([new TClassString($extends)]);
|
|
}
|
|
|
|
/**
|
|
* @param string $class_type
|
|
*
|
|
* @return Type\Union
|
|
*/
|
|
public static function getLiteralClassString($class_type)
|
|
{
|
|
$type = new TLiteralClassString($class_type);
|
|
|
|
return new Union([$type]);
|
|
}
|
|
|
|
/**
|
|
* @return Type\Union
|
|
*/
|
|
public static function getNull()
|
|
{
|
|
$type = new TNull;
|
|
|
|
return new Union([$type]);
|
|
}
|
|
|
|
/**
|
|
* @param bool $from_loop_isset
|
|
*
|
|
* @return Type\Union
|
|
*/
|
|
public static function getMixed($from_loop_isset = false)
|
|
{
|
|
$type = new TMixed($from_loop_isset);
|
|
|
|
return new Union([$type]);
|
|
}
|
|
|
|
/**
|
|
* @return Type\Union
|
|
*/
|
|
public static function getEmpty()
|
|
{
|
|
$type = new TEmpty();
|
|
|
|
return new Union([$type]);
|
|
}
|
|
|
|
/**
|
|
* @return Type\Union
|
|
*/
|
|
public static function getBool()
|
|
{
|
|
$type = new TBool;
|
|
|
|
return new Union([$type]);
|
|
}
|
|
|
|
/**
|
|
* @param float|null $value
|
|
*
|
|
* @return Type\Union
|
|
*/
|
|
public static function getFloat($value = null)
|
|
{
|
|
if ($value !== null) {
|
|
$type = new TLiteralFloat($value);
|
|
} else {
|
|
$type = new TFloat();
|
|
}
|
|
|
|
return new Union([$type]);
|
|
}
|
|
|
|
/**
|
|
* @return Type\Union
|
|
*/
|
|
public static function getObject()
|
|
{
|
|
$type = new TObject;
|
|
|
|
return new Union([$type]);
|
|
}
|
|
|
|
/**
|
|
* @return Type\Union
|
|
*/
|
|
public static function getClosure()
|
|
{
|
|
$type = new TNamedObject('Closure');
|
|
|
|
return new Union([$type]);
|
|
}
|
|
|
|
/**
|
|
* @return Type\Union
|
|
*/
|
|
public static function getArray()
|
|
{
|
|
$type = new TArray(
|
|
[
|
|
new Type\Union([new TMixed]),
|
|
new Type\Union([new TMixed]),
|
|
]
|
|
);
|
|
|
|
return new Union([$type]);
|
|
}
|
|
|
|
/**
|
|
* @return Type\Union
|
|
*/
|
|
public static function getEmptyArray()
|
|
{
|
|
$array_type = new TArray(
|
|
[
|
|
new Type\Union([new TEmpty]),
|
|
new Type\Union([new TEmpty]),
|
|
]
|
|
);
|
|
|
|
return new Type\Union([
|
|
$array_type,
|
|
]);
|
|
}
|
|
|
|
/**
|
|
* @return Type\Union
|
|
*/
|
|
public static function getVoid()
|
|
{
|
|
$type = new TVoid;
|
|
|
|
return new Union([$type]);
|
|
}
|
|
|
|
/**
|
|
* @return Type\Union
|
|
*/
|
|
public static function getFalse()
|
|
{
|
|
$type = new TFalse;
|
|
|
|
return new Union([$type]);
|
|
}
|
|
|
|
/**
|
|
* @return Type\Union
|
|
*/
|
|
public static function getTrue()
|
|
{
|
|
$type = new TTrue;
|
|
|
|
return new Union([$type]);
|
|
}
|
|
|
|
/**
|
|
* @return Type\Union
|
|
*/
|
|
public static function getResource()
|
|
{
|
|
return new Union([new TResource]);
|
|
}
|
|
|
|
/**
|
|
* Combines two union types into one
|
|
*
|
|
* @param Union $type_1
|
|
* @param Union $type_2
|
|
* @param int $literal_limit any greater number of literal types than this
|
|
* will be merged to a scalar
|
|
*
|
|
* @return Union
|
|
*/
|
|
public static function combineUnionTypes(
|
|
Union $type_1,
|
|
Union $type_2,
|
|
bool $overwrite_empty_array = false,
|
|
bool $allow_mixed_union = true,
|
|
int $literal_limit = 500
|
|
) {
|
|
if ($type_1->isVanillaMixed() && $type_2->isVanillaMixed()) {
|
|
$combined_type = Type::getMixed();
|
|
} else {
|
|
$both_failed_reconciliation = false;
|
|
|
|
if ($type_1->failed_reconciliation) {
|
|
if ($type_2->failed_reconciliation) {
|
|
$both_failed_reconciliation = true;
|
|
} else {
|
|
return $type_2;
|
|
}
|
|
} elseif ($type_2->failed_reconciliation) {
|
|
return $type_1;
|
|
}
|
|
|
|
$combined_type = TypeCombination::combineTypes(
|
|
array_merge(
|
|
array_values($type_1->getTypes()),
|
|
array_values($type_2->getTypes())
|
|
),
|
|
$overwrite_empty_array,
|
|
$allow_mixed_union,
|
|
$literal_limit
|
|
);
|
|
|
|
if (!$type_1->initialized || !$type_2->initialized) {
|
|
$combined_type->initialized = false;
|
|
}
|
|
|
|
if ($type_1->possibly_undefined_from_try || $type_2->possibly_undefined_from_try) {
|
|
$combined_type->possibly_undefined_from_try = true;
|
|
}
|
|
|
|
if ($type_1->from_docblock || $type_2->from_docblock) {
|
|
$combined_type->from_docblock = true;
|
|
}
|
|
|
|
if ($type_1->from_calculation || $type_2->from_calculation) {
|
|
$combined_type->from_calculation = true;
|
|
}
|
|
|
|
if ($type_1->ignore_nullable_issues || $type_2->ignore_nullable_issues) {
|
|
$combined_type->ignore_nullable_issues = true;
|
|
}
|
|
|
|
if ($type_1->ignore_falsable_issues || $type_2->ignore_falsable_issues) {
|
|
$combined_type->ignore_falsable_issues = true;
|
|
}
|
|
|
|
if ($both_failed_reconciliation) {
|
|
$combined_type->failed_reconciliation = true;
|
|
}
|
|
}
|
|
|
|
if ($type_1->possibly_undefined || $type_2->possibly_undefined) {
|
|
$combined_type->possibly_undefined = true;
|
|
}
|
|
|
|
return $combined_type;
|
|
}
|
|
}
|