src/op5/ninja_sdk/parsegen/js/LalrVisitorJSGenerator.php

   1 <?php
   2
   3 class LalrVisitorJSGenerator extends js_class_generator {
   4         private $grammar;
   5
   6         public function __construct( $parser_name, $grammar ) {
   7                 $this->classname = $parser_name . "Visitor";
   8                 $this->grammar = $grammar->get_rules();
   9         }
  10
  11         public function generate($skip_generated_note = false) {
  12                 parent::generate($skip_generated_note);
  13
  14                 $this->init_class();
  15                 foreach( $this->grammar as $name => $item ) {
  16                         if( $name[0] != '_' ) {
  17                                 $this->generate_visitor( $name, $item );
  18                         }
  19                 }
  20                 $this->generate_acceptor();
  21                 $this->finish_class();
  22         }
  23
  24         private function generate_visitor( $name, $item ) {
  25                 $item_name = $item->get_name();
  26
  27                 /* Transparent rules doesn't have a visitor method */
  28                 if( $item_name[0] == '_' )
  29                         return;
  30
  31                 $args = array();
  32                 foreach( $item->get_symbols() as $i => $symbol ) {
  33                         if( $item->symbol_enabled($i) ) {
  34                                 $args[] = rtrim($symbol,'0123456789').$i;
  35                         }
  36                 }
  37
  38                 $this->comment( strval( $item ) );
  39                 $this->init_function( 'visit_'.$name, $args );
  40                 $this->finish_function();
  41         }
  42
  43         private function generate_acceptor() {
  44                 $this->init_function( 'accept', array('result') );
  45                 $this->finish_function();
  46         }
  47 }