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<?php
declare(strict_types=1);
/*
* This file is part of PHP CS Fixer.
*
* (c) Fabien Potencier <[email protected]>
* Dariusz Rumiński <[email protected]>
*
* This source file is subject to the MIT license that is bundled
* with this source code in the file LICENSE.
*/
namespace PhpCsFixer\Tokenizer;
use PhpCsFixer\Utils;
/**
* Representation of single token.
* As a token prototype you should understand a single element generated by token_get_all.
*
* @author Dariusz Rumiński <[email protected]>
*/
final class Token
{
/**
* Content of token prototype.
*/
private string $content;
/**
* ID of token prototype, if available.
*/
private ?int $id = null;
/**
* If token prototype is an array.
*/
private bool $isArray;
/**
* Flag is token was changed.
*/
private bool $changed = false;
/**
* @param array{int, string}|string $token token prototype
*/
public function __construct($token)
{
if (\is_array($token)) {
if (!\is_int($token[0])) {
throw new \InvalidArgumentException(sprintf(
'Id must be an int, got "%s".',
get_debug_type($token[0])
));
}
if (!\is_string($token[1])) {
throw new \InvalidArgumentException(sprintf(
'Content must be a string, got "%s".',
get_debug_type($token[1])
));
}
if ('' === $token[1]) {
throw new \InvalidArgumentException('Cannot set empty content for id-based Token.');
}
$this->isArray = true;
$this->id = $token[0];
$this->content = $token[1];
} elseif (\is_string($token)) {
$this->isArray = false;
$this->content = $token;
} else {
throw new \InvalidArgumentException(sprintf('Cannot recognize input value as valid Token prototype, got "%s".', get_debug_type($token)));
}
}
/**
* @return list<int>
*/
public static function getCastTokenKinds(): array
{
static $castTokens = [T_ARRAY_CAST, T_BOOL_CAST, T_DOUBLE_CAST, T_INT_CAST, T_OBJECT_CAST, T_STRING_CAST, T_UNSET_CAST];
return $castTokens;
}
/**
* Get classy tokens kinds: T_CLASS, T_INTERFACE and T_TRAIT.
*
* @return list<int>
*/
public static function getClassyTokenKinds(): array
{
static $classTokens;
if (null === $classTokens) {
$classTokens = [T_CLASS, T_TRAIT, T_INTERFACE];
if (\defined('T_ENUM')) { // @TODO: drop condition when PHP 8.1+ is required
$classTokens[] = T_ENUM;
}
}
return $classTokens;
}
/**
* Get object operator tokens kinds: T_OBJECT_OPERATOR and (if available) T_NULLSAFE_OBJECT_OPERATOR.
*
* @return list<int>
*/
public static function getObjectOperatorKinds(): array
{
static $objectOperators = null;
if (null === $objectOperators) {
$objectOperators = [T_OBJECT_OPERATOR];
if (\defined('T_NULLSAFE_OBJECT_OPERATOR')) {
$objectOperators[] = T_NULLSAFE_OBJECT_OPERATOR;
}
}
return $objectOperators;
}
/**
* Check if token is equals to given one.
*
* If tokens are arrays, then only keys defined in parameter token are checked.
*
* @param array{0: int, 1?: string}|string|Token $other token or it's prototype
* @param bool $caseSensitive perform a case sensitive comparison
*/
public function equals($other, bool $caseSensitive = true): bool
{
if (\defined('T_AMPERSAND_FOLLOWED_BY_VAR_OR_VARARG')) { // @TODO: drop condition when PHP 8.1+ is required
if ('&' === $other) {
return '&' === $this->content && (null === $this->id || $this->isGivenKind([T_AMPERSAND_FOLLOWED_BY_VAR_OR_VARARG, T_AMPERSAND_NOT_FOLLOWED_BY_VAR_OR_VARARG]));
}
if (null === $this->id && '&' === $this->content) {
return $other instanceof self && '&' === $other->content && (null === $other->id || $other->isGivenKind([T_AMPERSAND_FOLLOWED_BY_VAR_OR_VARARG, T_AMPERSAND_NOT_FOLLOWED_BY_VAR_OR_VARARG]));
}
}
if ($other instanceof self) {
// Inlined getPrototype() on this very hot path.
// We access the private properties of $other directly to save function call overhead.
// This is only possible because $other is of the same class as `self`.
if (!$other->isArray) {
$otherPrototype = $other->content;
} else {
$otherPrototype = [
$other->id,
$other->content,
];
}
} else {
$otherPrototype = $other;
}
if ($this->isArray !== \is_array($otherPrototype)) {
return false;
}
if (!$this->isArray) {
return $this->content === $otherPrototype;
}
if ($this->id !== $otherPrototype[0]) {
return false;
}
if (isset($otherPrototype[1])) {
if ($caseSensitive) {
if ($this->content !== $otherPrototype[1]) {
return false;
}
} elseif (0 !== strcasecmp($this->content, $otherPrototype[1])) {
return false;
}
}
// detect unknown keys
unset($otherPrototype[0], $otherPrototype[1]);
return [] === $otherPrototype;
}
/**
* Check if token is equals to one of given.
*
* @param list<array{0: int, 1?: string}|string|Token> $others array of tokens or token prototypes
* @param bool $caseSensitive perform a case sensitive comparison
*/
public function equalsAny(array $others, bool $caseSensitive = true): bool
{
foreach ($others as $other) {
if ($this->equals($other, $caseSensitive)) {
return true;
}
}
return false;
}
/**
* A helper method used to find out whether a certain input token has to be case-sensitively matched.
*
* @param array<int, bool>|bool $caseSensitive global case sensitiveness or an array of booleans, whose keys should match
* the ones used in $sequence. If any is missing, the default case-sensitive
* comparison is used
* @param int $key the key of the token that has to be looked up
*
* @deprecated
*/
public static function isKeyCaseSensitive($caseSensitive, int $key): bool
{
Utils::triggerDeprecation(new \InvalidArgumentException(sprintf(
'Method "%s" is deprecated and will be removed in the next major version.',
__METHOD__
)));
if (\is_array($caseSensitive)) {
return $caseSensitive[$key] ?? true;
}
return $caseSensitive;
}
/**
* @return array{int, string}|string
*/
public function getPrototype()
{
if (!$this->isArray) {
return $this->content;
}
return [
$this->id,
$this->content,
];
}
/**
* Get token's content.
*
* It shall be used only for getting the content of token, not for checking it against excepted value.
*
* @return non-empty-string
*/
public function getContent(): string
{
return $this->content;
}
/**
* Get token's id.
*
* It shall be used only for getting the internal id of token, not for checking it against excepted value.
*/
public function getId(): ?int
{
return $this->id;
}
/**
* Get token's name.
*
* It shall be used only for getting the name of token, not for checking it against excepted value.
*
* @return null|string token name
*/
public function getName(): ?string
{
if (null === $this->id) {
return null;
}
return self::getNameForId($this->id);
}
/**
* Get token's name.
*
* It shall be used only for getting the name of token, not for checking it against excepted value.
*
* @return null|string token name
*/
public static function getNameForId(int $id): ?string
{
if (CT::has($id)) {
return CT::getName($id);
}
$name = token_name($id);
return 'UNKNOWN' === $name ? null : $name;
}
/**
* Generate array containing all keywords that exists in PHP version in use.
*
* @return array<int, int>
*/
public static function getKeywords(): array
{
static $keywords = null;
if (null === $keywords) {
$keywords = self::getTokenKindsForNames(['T_ABSTRACT', 'T_ARRAY', 'T_AS', 'T_BREAK', 'T_CALLABLE', 'T_CASE',
'T_CATCH', 'T_CLASS', 'T_CLONE', 'T_CONST', 'T_CONTINUE', 'T_DECLARE', 'T_DEFAULT', 'T_DO',
'T_ECHO', 'T_ELSE', 'T_ELSEIF', 'T_EMPTY', 'T_ENDDECLARE', 'T_ENDFOR', 'T_ENDFOREACH',
'T_ENDIF', 'T_ENDSWITCH', 'T_ENDWHILE', 'T_EVAL', 'T_EXIT', 'T_EXTENDS', 'T_FINAL',
'T_FINALLY', 'T_FN', 'T_FOR', 'T_FOREACH', 'T_FUNCTION', 'T_GLOBAL', 'T_GOTO', 'T_HALT_COMPILER',
'T_IF', 'T_IMPLEMENTS', 'T_INCLUDE', 'T_INCLUDE_ONCE', 'T_INSTANCEOF', 'T_INSTEADOF',
'T_INTERFACE', 'T_ISSET', 'T_LIST', 'T_LOGICAL_AND', 'T_LOGICAL_OR', 'T_LOGICAL_XOR',
'T_NAMESPACE', 'T_MATCH', 'T_NEW', 'T_PRINT', 'T_PRIVATE', 'T_PROTECTED', 'T_PUBLIC', 'T_REQUIRE',
'T_REQUIRE_ONCE', 'T_RETURN', 'T_STATIC', 'T_SWITCH', 'T_THROW', 'T_TRAIT', 'T_TRY',
'T_UNSET', 'T_USE', 'T_VAR', 'T_WHILE', 'T_YIELD', 'T_YIELD_FROM', 'T_READONLY', 'T_ENUM',
]) + [
CT::T_ARRAY_TYPEHINT => CT::T_ARRAY_TYPEHINT,
CT::T_CLASS_CONSTANT => CT::T_CLASS_CONSTANT,
CT::T_CONST_IMPORT => CT::T_CONST_IMPORT,
CT::T_CONSTRUCTOR_PROPERTY_PROMOTION_PRIVATE => CT::T_CONSTRUCTOR_PROPERTY_PROMOTION_PRIVATE,
CT::T_CONSTRUCTOR_PROPERTY_PROMOTION_PROTECTED => CT::T_CONSTRUCTOR_PROPERTY_PROMOTION_PROTECTED,
CT::T_CONSTRUCTOR_PROPERTY_PROMOTION_PUBLIC => CT::T_CONSTRUCTOR_PROPERTY_PROMOTION_PUBLIC,
CT::T_FUNCTION_IMPORT => CT::T_FUNCTION_IMPORT,
CT::T_NAMESPACE_OPERATOR => CT::T_NAMESPACE_OPERATOR,
CT::T_USE_LAMBDA => CT::T_USE_LAMBDA,
CT::T_USE_TRAIT => CT::T_USE_TRAIT,
];
}
return $keywords;
}
/**
* Generate array containing all predefined constants that exists in PHP version in use.
*
* @see https://php.net/manual/en/language.constants.predefined.php
*
* @return array<int, int>
*/
public static function getMagicConstants(): array
{
static $magicConstants = null;
if (null === $magicConstants) {
$magicConstants = self::getTokenKindsForNames(['T_CLASS_C', 'T_DIR', 'T_FILE', 'T_FUNC_C', 'T_LINE', 'T_METHOD_C', 'T_NS_C', 'T_TRAIT_C']);
}
return $magicConstants;
}
/**
* Check if token prototype is an array.
*
* @return bool is array
*/
public function isArray(): bool
{
return $this->isArray;
}
/**
* Check if token is one of type cast tokens.
*/
public function isCast(): bool
{
return $this->isGivenKind(self::getCastTokenKinds());
}
/**
* Check if token is one of classy tokens: T_CLASS, T_INTERFACE, T_TRAIT or T_ENUM.
*/
public function isClassy(): bool
{
return $this->isGivenKind(self::getClassyTokenKinds());
}
/**
* Check if token is one of comment tokens: T_COMMENT or T_DOC_COMMENT.
*/
public function isComment(): bool
{
static $commentTokens = [T_COMMENT, T_DOC_COMMENT];
return $this->isGivenKind($commentTokens);
}
/**
* Check if token is one of object operator tokens: T_OBJECT_OPERATOR or T_NULLSAFE_OBJECT_OPERATOR.
*/
public function isObjectOperator(): bool
{
return $this->isGivenKind(self::getObjectOperatorKinds());
}
/**
* Check if token is one of given kind.
*
* @param int|list<int> $possibleKind kind or array of kinds
*/
public function isGivenKind($possibleKind): bool
{
return $this->isArray && (\is_array($possibleKind) ? \in_array($this->id, $possibleKind, true) : $this->id === $possibleKind);
}
/**
* Check if token is a keyword.
*/
public function isKeyword(): bool
{
$keywords = self::getKeywords();
return $this->isArray && isset($keywords[$this->id]);
}
/**
* Check if token is a native PHP constant: true, false or null.
*/
public function isNativeConstant(): bool
{
static $nativeConstantStrings = ['true', 'false', 'null'];
return $this->isArray && \in_array(strtolower($this->content), $nativeConstantStrings, true);
}
/**
* Returns if the token is of a Magic constants type.
*
* @see https://php.net/manual/en/language.constants.predefined.php
*/
public function isMagicConstant(): bool
{
$magicConstants = self::getMagicConstants();
return $this->isArray && isset($magicConstants[$this->id]);
}
/**
* Check if token is whitespace.
*
* @param null|string $whitespaces whitespace characters, default is " \t\n\r\0\x0B"
*/
public function isWhitespace(?string $whitespaces = " \t\n\r\0\x0B"): bool
{
if (null === $whitespaces) {
$whitespaces = " \t\n\r\0\x0B";
}
if ($this->isArray && !$this->isGivenKind(T_WHITESPACE)) {
return false;
}
return '' === trim($this->content, $whitespaces);
}
/**
* @return array{
* id: int|null,
* name: string|null,
* content: string,
* isArray: bool,
* changed: bool,
* }
*/
public function toArray(): array
{
return [
'id' => $this->id,
'name' => $this->getName(),
'content' => $this->content,
'isArray' => $this->isArray,
'changed' => $this->changed,
];
}
public function toJson(): string
{
$jsonResult = json_encode($this->toArray(), JSON_PRETTY_PRINT | JSON_NUMERIC_CHECK);
if (JSON_ERROR_NONE !== json_last_error()) {
$jsonResult = json_encode(
[
'errorDescription' => 'Cannot encode Tokens to JSON.',
'rawErrorMessage' => json_last_error_msg(),
],
JSON_PRETTY_PRINT | JSON_NUMERIC_CHECK
);
}
return $jsonResult;
}
/**
* @param list<string> $tokenNames
*
* @return array<int, int>
*/
private static function getTokenKindsForNames(array $tokenNames): array
{
$keywords = [];
foreach ($tokenNames as $keywordName) {
if (\defined($keywordName)) {
$keyword = \constant($keywordName);
$keywords[$keyword] = $keyword;
}
}
return $keywords;
}
}