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Edit File : ParseCommand.php \| Size : 4.90 KB
<?php /* * This file is part of Psy Shell. * * (c) 2012-2018 Justin Hileman * * For the full copyright and license information, please view the LICENSE * file that was distributed with this source code. / namespace Psy\Command; use PhpParser\Node; use PhpParser\Parser; use Psy\Context; use Psy\ContextAware; use Psy\Input\CodeArgument; use Psy\ParserFactory; use Psy\VarDumper\Presenter; use Psy\VarDumper\PresenterAware; use Symfony\Component\Console\Input\InputInterface; use Symfony\Component\Console\Input\InputOption; use Symfony\Component\Console\Output\OutputInterface; use Symfony\Component\VarDumper\Caster\Caster; /* * Parse PHP code and show the abstract syntax tree. / class ParseCommand extends Command implements ContextAware, PresenterAware { /* * Context instance (for ContextAware interface). * * @var Context / protected $context; private $presenter; private $parserFactory; private $parsers; /* * {@inheritdoc} / public function __construct($name = null) { $this->parserFactory = new ParserFactory(); $this->parsers = []; parent::__construct($name); } /* * ContextAware interface. * * @param Context $context / public function setContext(Context $context) { $this->context = $context; } /* * PresenterAware interface. * * @param Presenter $presenter / public function setPresenter(Presenter $presenter) { $this->presenter = clone $presenter; $this->presenter->addCasters([ 'PhpParser\Node' => function (Node $node, array $a) { $a = [ Caster::PREFIX_VIRTUAL . 'type' => $node->getType(), Caster::PREFIX_VIRTUAL . 'attributes' => $node->getAttributes(), ]; foreach ($node->getSubNodeNames() as $name) { $a[Caster::PREFIX_VIRTUAL . $name] = $node->$name; } return $a; }, ]); } /* * {@inheritdoc} / protected function configure() { $definition = [ new CodeArgument('code', CodeArgument::REQUIRED, 'PHP code to parse.'), new InputOption('depth', '', InputOption::VALUE_REQUIRED, 'Depth to parse.', 10), ]; if ($this->parserFactory->hasKindsSupport()) { $msg = 'One of PhpParser\\ParserFactory constants: ' . \implode(', ', ParserFactory::getPossibleKinds()) . " (default is based on current interpreter's version)."; $defaultKind = $this->parserFactory->getDefaultKind(); $definition[] = new InputOption('kind', '', InputOption::VALUE_REQUIRED, $msg, $defaultKind); } $this ->setName('parse') ->setDefinition($definition) ->setDescription('Parse PHP code and show the abstract syntax tree.') ->setHelp( <<<'HELP' Parse PHP code and show the abstract syntax tree. This command is used in the development of PsySH. Given a string of PHP code, it pretty-prints the PHP Parser parse tree. See https://github.com/nikic/PHP-Parser It prolly won't be super useful for most of you, but it's here if you want to play. HELP ); } /* * {@inheritdoc} / protected function execute(InputInterface $input, OutputInterface $output) { $code = $input->getArgument('code'); if (\strpos('<?', $code) === false) { $code = '<?php ' . $code; } $parserKind = $this->parserFactory->hasKindsSupport() ? $input->getOption('kind') : null; $depth = $input->getOption('depth'); $nodes = $this->parse($this->getParser($parserKind), $code); $output->page($this->presenter->present($nodes, $depth)); $this->context->setReturnValue($nodes); } /* * Lex and parse a string of code into statements. * * @param Parser $parser * @param string $code * * @return array Statements / private function parse(Parser $parser, $code) { try { return $parser->parse($code); } catch (\PhpParser\Error $e) { if (\strpos($e->getMessage(), 'unexpected EOF') === false) { throw $e; } // If we got an unexpected EOF, let's try it again with a semicolon. return $parser->parse($code . ';'); } } /* * Get (or create) the Parser instance. * * @param string\|null $kind One of Psy\ParserFactory constants (only for PHP parser 2.0 and above) * * @return Parser */ private function getParser($kind = null) { if (!\array_key_exists($kind, $this->parsers)) { $this->parsers[$kind] = $this->parserFactory->createParser($kind); } return $this->parsers[$kind]; } } Back

Edit File : ParseCommand.php | Size : 4.90 KB

<?php

/*
 * This file is part of Psy Shell.
 *
 * (c) 2012-2018 Justin Hileman
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Psy\Command;

use PhpParser\Node;
use PhpParser\Parser;
use Psy\Context;
use Psy\ContextAware;
use Psy\Input\CodeArgument;
use Psy\ParserFactory;
use Psy\VarDumper\Presenter;
use Psy\VarDumper\PresenterAware;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Input\InputOption;
use Symfony\Component\Console\Output\OutputInterface;
use Symfony\Component\VarDumper\Caster\Caster;

/**
 * Parse PHP code and show the abstract syntax tree.
 */
class ParseCommand extends Command implements ContextAware, PresenterAware
{
    /**
     * Context instance (for ContextAware interface).
     *
     * @var Context
     */
    protected $context;

private $presenter;
    private $parserFactory;
    private $parsers;

/**
     * {@inheritdoc}
     */
    public function __construct($name = null)
    {
        $this->parserFactory = new ParserFactory();
        $this->parsers       = [];

parent::__construct($name);
    }

/**
     * ContextAware interface.
     *
     * @param Context $context
     */
    public function setContext(Context $context)
    {
        $this->context = $context;
    }

/**
     * PresenterAware interface.
     *
     * @param Presenter $presenter
     */
    public function setPresenter(Presenter $presenter)
    {
        $this->presenter = clone $presenter;
        $this->presenter->addCasters([
            'PhpParser\Node' => function (Node $node, array $a) {
                $a = [
                    Caster::PREFIX_VIRTUAL . 'type'       => $node->getType(),
                    Caster::PREFIX_VIRTUAL . 'attributes' => $node->getAttributes(),
                ];

foreach ($node->getSubNodeNames() as $name) {
                    $a[Caster::PREFIX_VIRTUAL . $name] = $node->$name;
                }

return $a;
            },
        ]);
    }

/**
     * {@inheritdoc}
     */
    protected function configure()
    {
        $definition = [
            new CodeArgument('code', CodeArgument::REQUIRED, 'PHP code to parse.'),
            new InputOption('depth', '', InputOption::VALUE_REQUIRED, 'Depth to parse.', 10),
        ];

if ($this->parserFactory->hasKindsSupport()) {
            $msg = 'One of PhpParser\\ParserFactory constants: '
                . \implode(', ', ParserFactory::getPossibleKinds())
                . " (default is based on current interpreter's version).";
            $defaultKind = $this->parserFactory->getDefaultKind();

$definition[] = new InputOption('kind', '', InputOption::VALUE_REQUIRED, $msg, $defaultKind);
        }

$this
            ->setName('parse')
            ->setDefinition($definition)
            ->setDescription('Parse PHP code and show the abstract syntax tree.')
            ->setHelp(
                <<<'HELP'
Parse PHP code and show the abstract syntax tree.

This command is used in the development of PsySH. Given a string of PHP code,
it pretty-prints the PHP Parser parse tree.

See https://github.com/nikic/PHP-Parser

It prolly won't be super useful for most of you, but it's here if you want to play.
HELP
            );
    }

/**
     * {@inheritdoc}
     */
    protected function execute(InputInterface $input, OutputInterface $output)
    {
        $code = $input->getArgument('code');
        if (\strpos('<?', $code) === false) {
            $code = '<?php ' . $code;
        }

$parserKind = $this->parserFactory->hasKindsSupport() ? $input->getOption('kind') : null;
        $depth      = $input->getOption('depth');
        $nodes      = $this->parse($this->getParser($parserKind), $code);
        $output->page($this->presenter->present($nodes, $depth));

$this->context->setReturnValue($nodes);
    }

/**
     * Lex and parse a string of code into statements.
     *
     * @param Parser $parser
     * @param string $code
     *
     * @return array Statements
     */
    private function parse(Parser $parser, $code)
    {
        try {
            return $parser->parse($code);
        } catch (\PhpParser\Error $e) {
            if (\strpos($e->getMessage(), 'unexpected EOF') === false) {
                throw $e;
            }

// If we got an unexpected EOF, let's try it again with a semicolon.
            return $parser->parse($code . ';');
        }
    }

/**
     * Get (or create) the Parser instance.
     *
     * @param string|null $kind One of Psy\ParserFactory constants (only for PHP parser 2.0 and above)
     *
     * @return Parser
     */
    private function getParser($kind = null)
    {
        if (!\array_key_exists($kind, $this->parsers)) {
            $this->parsers[$kind] = $this->parserFactory->createParser($kind);
        }

return $this->parsers[$kind];
    }
}

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