the whole shebang
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225
vendor/nikic/php-parser/grammar/rebuildParser.php
vendored
Normal file
225
vendor/nikic/php-parser/grammar/rebuildParser.php
vendored
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<?php
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$grammarFile = __DIR__ . '/zend_language_parser.phpy';
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$skeletonFile = __DIR__ . '/kmyacc.php.parser';
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$tmpGrammarFile = __DIR__ . '/tmp_parser.phpy';
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$tmpResultFile = __DIR__ . '/tmp_parser.php';
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$parserResultFile = __DIR__ . '/../lib/PHPParser/Parser.php';
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$debugParserResultFile = __DIR__ . '/../lib/PHPParser/Parser/Debug.php';
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// check for kmyacc.exe binary in this directory, otherwise fall back to global name
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$kmyacc = __DIR__ . '/kmyacc.exe';
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if (!file_exists($kmyacc)) {
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$kmyacc = 'kmyacc';
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}
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$options = array_flip($argv);
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$optionDebug = isset($options['--debug']);
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$optionKeepTmpGrammar = isset($options['--keep-tmp-grammar']);
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///////////////////////////////
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/// Utility regex constants ///
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///////////////////////////////
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const LIB = '(?(DEFINE)
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(?<singleQuotedString>\'[^\\\\\']*+(?:\\\\.[^\\\\\']*+)*+\')
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(?<doubleQuotedString>"[^\\\\"]*+(?:\\\\.[^\\\\"]*+)*+")
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(?<string>(?&singleQuotedString)|(?&doubleQuotedString))
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(?<comment>/\*[^*]*+(?:\*(?!/)[^*]*+)*+\*/)
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(?<code>\{[^\'"/{}]*+(?:(?:(?&string)|(?&comment)|(?&code)|/)[^\'"/{}]*+)*+})
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)';
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const PARAMS = '\[(?<params>[^[\]]*+(?:\[(?¶ms)\][^[\]]*+)*+)\]';
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const ARGS = '\((?<args>[^()]*+(?:\((?&args)\)[^()]*+)*+)\)';
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///////////////////
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/// Main script ///
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///////////////////
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echo 'Building temporary preproprocessed grammar file.', "\n";
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$grammarCode = file_get_contents($grammarFile);
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$grammarCode = resolveConstants($grammarCode);
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$grammarCode = resolveNodes($grammarCode);
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$grammarCode = resolveMacros($grammarCode);
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$grammarCode = resolveArrays($grammarCode);
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file_put_contents($tmpGrammarFile, $grammarCode);
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echo "Building parser.\n";
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$output = trim(shell_exec("$kmyacc -l -m $skeletonFile -p PHPParser_Parser $tmpGrammarFile 2>&1"));
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echo "Output: \"$output\"\n";
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moveFileWithDirCheck($tmpResultFile, $parserResultFile);
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if ($optionDebug) {
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echo "Building debug parser.\n";
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$output = trim(shell_exec("$kmyacc -t -v -l -m $skeletonFile -p PHPParser_Parser $tmpGrammarFile 2>&1"));
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echo "Output: \"$output\"\n";
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moveFileWithDirCheck($tmpResultFile, $debugParserResultFile);
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}
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if (!$optionKeepTmpGrammar) {
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unlink($tmpGrammarFile);
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}
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///////////////////////////////
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/// Preprocessing functions ///
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///////////////////////////////
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function resolveConstants($code) {
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return preg_replace('~[A-Z][a-zA-Z_]++::~', 'PHPParser_Node_$0', $code);
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}
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function resolveNodes($code) {
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return preg_replace_callback(
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'~(?<name>[A-Z][a-zA-Z_]++)\s*' . PARAMS . '~',
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function($matches) {
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// recurse
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$matches['params'] = resolveNodes($matches['params']);
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$params = magicSplit(
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'(?:' . PARAMS . '|' . ARGS . ')(*SKIP)(*FAIL)|,',
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$matches['params']
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);
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$paramCode = '';
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foreach ($params as $param) {
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$paramCode .= $param . ', ';
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}
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return 'new PHPParser_Node_' . $matches['name'] . '(' . $paramCode . '$attributes)';
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},
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$code
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);
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}
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function resolveMacros($code) {
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return preg_replace_callback(
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'~\b(?<!::|->)(?!array\()(?<name>[a-z][A-Za-z]++)' . ARGS . '~',
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function($matches) {
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// recurse
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$matches['args'] = resolveMacros($matches['args']);
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$name = $matches['name'];
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$args = magicSplit(
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'(?:' . PARAMS . '|' . ARGS . ')(*SKIP)(*FAIL)|,',
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$matches['args']
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);
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if ('error' == $name) {
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assertArgs(1, $args, $name);
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return 'throw new PHPParser_Error(' . $args[0] . ')';
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}
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if ('init' == $name) {
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return '$$ = array(' . implode(', ', $args) . ')';
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}
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if ('push' == $name) {
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assertArgs(2, $args, $name);
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return $args[0] . '[] = ' . $args[1] . '; $$ = ' . $args[0];
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}
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if ('pushNormalizing' == $name) {
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assertArgs(2, $args, $name);
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return 'if (is_array(' . $args[1] . ')) { $$ = array_merge(' . $args[0] . ', ' . $args[1] . '); } else { ' . $args[0] . '[] = ' . $args[1] . '; $$ = ' . $args[0] . '; }';
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}
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if ('toArray' == $name) {
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assertArgs(1, $args, $name);
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return 'is_array(' . $args[0] . ') ? ' . $args[0] . ' : array(' . $args[0] . ')';
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}
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if ('parseVar' == $name) {
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assertArgs(1, $args, $name);
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return 'substr(' . $args[0] . ', 1)';
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}
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if ('parseEncapsed' == $name) {
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assertArgs(2, $args, $name);
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return 'foreach (' . $args[0] . ' as &$s) { if (is_string($s)) { $s = PHPParser_Node_Scalar_String::parseEscapeSequences($s, ' . $args[1] . '); } }';
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}
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if ('parseEncapsedDoc' == $name) {
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assertArgs(1, $args, $name);
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return 'foreach (' . $args[0] . ' as &$s) { if (is_string($s)) { $s = PHPParser_Node_Scalar_String::parseEscapeSequences($s, null); } } $s = preg_replace(\'~(\r\n|\n|\r)$~\', \'\', $s); if (\'\' === $s) array_pop(' . $args[0] . ');';
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}
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throw new Exception(sprintf('Unknown macro "%s"', $name));
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},
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$code
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);
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}
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function assertArgs($num, $args, $name) {
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if ($num != count($args)) {
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die('Wrong argument count for ' . $name . '().');
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}
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}
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function resolveArrays($code) {
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return preg_replace_callback(
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'~' . PARAMS . '~',
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function ($matches) {
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$elements = magicSplit(
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'(?:' . PARAMS . '|' . ARGS . ')(*SKIP)(*FAIL)|,',
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$matches['params']
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);
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// don't convert [] to array, it might have different meaning
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if (empty($elements)) {
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return $matches[0];
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}
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$elementCodes = array();
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foreach ($elements as $element) {
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// convert only arrays where all elements have keys
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if (false === strpos($element, ':')) {
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return $matches[0];
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}
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list($key, $value) = explode(':', $element, 2);
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$elementCodes[] = "'" . $key . "' =>" . $value;
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}
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return 'array(' . implode(', ', $elementCodes) . ')';
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},
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$code
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);
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}
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function moveFileWithDirCheck($fromPath, $toPath) {
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$dir = dirname($toPath);
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if (!is_dir($dir)) {
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mkdir($dir, 0777, true);
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}
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rename($fromPath, $toPath);
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}
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//////////////////////////////
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/// Regex helper functions ///
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//////////////////////////////
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function regex($regex) {
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return '~' . LIB . '(?:' . str_replace('~', '\~', $regex) . ')~';
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}
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function magicSplit($regex, $string) {
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$pieces = preg_split(regex('(?:(?&string)|(?&comment)|(?&code))(*SKIP)(*FAIL)|' . $regex), $string);
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foreach ($pieces as &$piece) {
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$piece = trim($piece);
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}
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return array_filter($pieces);
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}
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