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<?php |
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namespace Remorhaz\UniLex\Lexer; |
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use Remorhaz\UniLex\Exception; |
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use Remorhaz\UniLex\IO\CharBufferInterface; |
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use Remorhaz\UniLex\IO\TokenExtractInterface; |
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use function array_diff; |
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use function array_intersect; |
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use function array_key_first; |
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use function array_keys; |
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use function count; |
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abstract class TokenMatcherTemplate implements TokenMatcherInterface |
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{ |
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private $token; |
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private $mode = self::DEFAULT_MODE; |
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/** |
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* @return Token |
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* @throws Exception |
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*/ |
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public function getToken(): Token |
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{ |
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if (!isset($this->token)) { |
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throw new Exception("Token is not defined"); |
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} |
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return $this->token; |
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} |
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protected function createContext( |
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CharBufferInterface $buffer, |
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TokenFactoryInterface $tokenFactory |
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): TokenMatcherContextInterface { |
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$onConstruct = function (): void { |
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unset($this->token); |
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}; |
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$onSetNewToken = function (int $tokenType) use ($tokenFactory): void { |
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$this->token = $tokenFactory->createToken($tokenType); |
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}; |
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$onGetToken = function (): Token { |
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return $this->getToken(); |
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}; |
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$onSetMode = function (string $mode): void { |
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$this->mode = $mode; |
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}; |
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$onGetMode = function (): string { |
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return $this->mode; |
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}; |
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return new class ( |
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$buffer, |
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$onConstruct, |
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$onSetNewToken, |
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$onGetToken, |
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$onSetMode, |
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$onGetMode |
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) implements TokenMatcherContextInterface { |
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private $buffer; |
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private $onSetNewToken; |
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private $onGetToken; |
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private $onSetMode; |
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private $onGetMode; |
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private $regExps = []; |
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public function __construct( |
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CharBufferInterface $buffer, |
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callable $onConstruct, |
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callable $onSetNewToken, |
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callable $onGetToken, |
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callable $onSetMode, |
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callable $onGetMode |
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) { |
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$this->buffer = $buffer; |
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$this->onSetNewToken = $onSetNewToken; |
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$this->onGetToken = $onGetToken; |
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$this->onSetMode = $onSetMode; |
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$this->onGetMode = $onGetMode; |
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call_user_func($onConstruct); |
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} |
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public function setNewToken(int $tokenType): TokenMatcherContextInterface |
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{ |
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call_user_func($this->onSetNewToken, $tokenType); |
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return $this; |
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} |
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/** |
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* @param string $name |
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* @param $value |
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* @return TokenMatcherContextInterface |
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*/ |
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public function setTokenAttribute(string $name, $value): TokenMatcherContextInterface |
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{ |
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$this |
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->getToken() |
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->setAttribute($name, $value); |
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return $this; |
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} |
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public function getToken(): Token |
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{ |
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return call_user_func($this->onGetToken); |
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} |
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public function getBuffer(): CharBufferInterface |
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{ |
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return $this->buffer; |
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} |
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public function getSymbolString(): string |
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{ |
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$buffer = $this->getBuffer(); |
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if ($buffer instanceof TokenExtractInterface) { |
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return $buffer->getTokenAsString(); |
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} |
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throw new Exception("Extracting strings is not supported by buffer"); |
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} |
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public function getSymbolList(): array |
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{ |
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$buffer = $this->getBuffer(); |
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if ($buffer instanceof TokenExtractInterface) { |
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return $buffer->getTokenAsArray(); |
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} |
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throw new Exception("Extracting arrays is not supported by buffer"); |
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} |
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public function getMode(): string |
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{ |
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return call_user_func($this->onGetMode); |
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} |
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public function setMode(string $mode): TokenMatcherContextInterface |
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{ |
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call_user_func($this->onSetMode, $mode); |
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return $this; |
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} |
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public function setRegExps(string ...$regExps): void |
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{ |
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$this->regExps = $regExps; |
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} |
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public function allowRegExps(string ...$regExps): void |
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{ |
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$this->regExps = array_intersect($this->regExps, $regExps); |
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} |
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public function getRegExp(): string |
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{ |
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if (count($this->regExps) == 1) { |
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return $this->regExps[array_key_first($this->regExps)]; |
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} |
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throw new Exception("Target regular expression is undefined"); |
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} |
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}; |
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} |
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} |
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remorhaz /
php-unilex
