100 lines
3.1 KiB
PHP
100 lines
3.1 KiB
PHP
<?php
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/*
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[The "BSD licence"]
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Copyright (c) 2005-2008 Terence Parr
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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1. Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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3. The name of the author may not be used to endorse or promote products
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derived from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/** A parser for TokenStreams. "parser grammars" result in a subclass
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* of this.
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*/
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class AntlrParser extends BaseRecognizer {
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public $input;
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public function __construct($input, $state = null) {
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parent::__construct($state); // share the state object with another parser
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$this->setTokenStream($input);
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}
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public function reset() {
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parent::reset(); // reset all recognizer state variables
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if ( $this->input!=null ) {
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$this->input->seek(0); // rewind the input
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}
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}
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protected function getCurrentInputSymbol($input) {
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return $this->input->LT(1);
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}
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protected function getMissingSymbol($input, $e, $expectedTokenType, $follow)
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{
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$tokenText = null;
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if ( $expectedTokenType==TokenConst::$EOF ){
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$tokenText = "<missing EOF>";
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} else {
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$tokenNames = $this->getTokenNames();
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$tokenText = "<missing ".$tokenNames[$expectedTokenType].">";
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}
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$t = CommonToken::forTypeAndText($expectedTokenType, $tokenText);
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$current = $input->LT(1);
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if ( $current->getType() == TokenConst::$EOF ) {
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$current = $this->input->LT(-1);
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}
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$t->line = $current->getLine();
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$t->charPositionInLine = $current->getCharPositionInLine();
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$t->channel = $DEFAULT_TOKEN_CHANNEL;
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return $t;
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}
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/** Set the token stream and reset the parser */
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public function setTokenStream($input) {
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$this->input = null;
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$this->reset();
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$this->input = $input;
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}
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public function getTokenStream() {
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return $this->input;
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}
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public function getSourceName() {
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return $this->input->getSourceName();
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}
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public function traceIn($ruleName, $ruleIndex) {
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parent::traceIn($ruleName, $ruleIndex, $this->input->LT(1));
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}
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public function traceOut($ruleName, $ruleIndex) {
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parent::traceOut($ruleName, $ruleIndex, $this->input->LT(1));
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}
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}
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?>
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