trekel / src / plex / Trekel / Lexer.plex

<?php

/**
 * Copyright 2010 Joey Mazzarelli. All rights reserved.
 *
 * Redistribution and use in source, with or without modification, is
 * permitted provided that the following condition is met:
 *
 *    1. Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *
 * THIS SOFTWARE IS PROVIDED BY JOEY MAZZARELLI ``AS IS'' AND ANY EXPRESS
 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL JOEY MAZZARELLI OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
 * THE POSSIBILITY OF SUCH DAMAGE.
 *
 * The views and conclusions contained in the software and documentation
 * are those of the authors and should not be interpreted as representing
 * official policies, either expressed or implied, of Joey Mazzarelli.
 */

class Trekel_Lexer {

  private $input;
  private $N;
  public $token;
  public $value;
  public $line;

  function __construct ($data) {
    $this->input = $data;
    $this->N = 0;
  }

/*!lex2php
%input $this->input
%counter $this->N
%token $this->token
%value $this->value
%line $this->line
%matchlongest true

// Regular expression tokens

GETTER = /[a-zA-Z][a-zA-Z0-9_]*\(\)/
IDENTIFIER = /[a-zA-Z][a-zA-Z0-9_]*/
DQUOTESTRING = /"([^"]|(\\"))*"/
PSEUDO = /:[a-zA-Z][a-zA-Z0-9_-]*/
SQUOTESTRING = /'([^']|(''))*'/
WHITESPACE = /\s+/

*/

/*!lex2php

// === Literal Tokens ===
'*' { $this->token = Trekel_Parser::T_IDENTIFIER; }
'[' { $this->token = Trekel_Parser::T_LBRACKET; }
']' { $this->token = Trekel_Parser::T_RBRACKET; }
'=' { $this->token = Trekel_Parser::T_EQ; }
'^=' { $this->token = Trekel_Parser::T_STARTSWITH; }
'$=' { $this->token = Trekel_Parser::T_ENDSWITH; }
'*=' { $this->token = Trekel_Parser::T_CONTAINS; }
'!=' { $this->token = Trekel_Parser::T_NEQ; }
'@=' { $this->token = Trekel_Parser::T_REGEX; }
'>' { $this->token = Trekel_Parser::T_CHILD; }
'+' { $this->token = Trekel_Parser::T_ADJACENT; }
'~' { $this->token = Trekel_Parser::T_SIBLING; }

// === Regular expression tokens ===
GETTER { $this->token = Trekel_Parser::T_GETTER; }
IDENTIFIER { $this->token = Trekel_Parser::T_IDENTIFIER; }
PSEUDO { $this->token = Trekel_Parser::T_PSEUDO; }
DQUOTESTRING { $this->token = Trekel_Parser::T_STRING; }
SQUOTESTRING { $this->token = Trekel_Parser::T_STRING; }
WHITESPACE { return false; }

*/

} // end Trekel_Lexer

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