src/jdk/nashorn/internal/parser/AbstractParser.java

rev 750 : 8032068: implement @sourceURL and #sourceURL directives
Reviewed-by: hannesw, lagergren

*** 24,33 ****
--- 24,34 ----
   */
  
  package jdk.nashorn.internal.parser;
  
  import static jdk.nashorn.internal.parser.TokenType.COMMENT;
+ import static jdk.nashorn.internal.parser.TokenType.DIRECTIVE_COMMENT;
  import static jdk.nashorn.internal.parser.TokenType.EOF;
  import static jdk.nashorn.internal.parser.TokenType.EOL;
  import static jdk.nashorn.internal.parser.TokenType.IDENT;
  
  import jdk.nashorn.internal.ir.IdentNode;
*** 82,91 ****
--- 83,95 ----
      protected Lexer lexer;
  
      /** Is this parser running under strict mode? */
      protected boolean isStrictMode;
  
+     /** //@ sourceURL or //# sourceURL */
+     protected String sourceURL;
+ 
      /**
       * Construct a parser.
       *
       * @param source  Source to parse.
       * @param errors  Error reporting manager.
*** 154,174 ****
       * @return tokenType of next token.
       */
      protected final TokenType nextOrEOL() {
          do {
              nextToken();
!         } while (type == COMMENT);
  
          return type;
      }
  
      /**
       * Seek next token.
       *
       * @return tokenType of next token.
       */
!     private final TokenType nextToken() {
          // Capture last token tokenType.
          last = type;
          if (type != EOF) {
  
              // Set up next token.
--- 158,199 ----
       * @return tokenType of next token.
       */
      protected final TokenType nextOrEOL() {
          do {
              nextToken();
!             if (type == DIRECTIVE_COMMENT) {
!                 checkDirectiveComment();
!             }
!         } while (type == COMMENT || type == DIRECTIVE_COMMENT);
  
          return type;
      }
  
+     // sourceURL= after directive comment
+     private static final String SOURCE_URL_PREFIX = "sourceURL=";
+ 
+     // currently only @sourceURL=foo supported
+     private void checkDirectiveComment() {
+         // if already set, ignore this one
+         if (sourceURL != null) {
+             return;
+         }
+ 
+         final String comment = (String) lexer.getValueOf(token, isStrictMode);
+         final int len = comment.length();
+         // 4 characters for directive comment marker //@\s or //#\s
+         if (len > 4 && comment.substring(4).startsWith(SOURCE_URL_PREFIX)) {
+             sourceURL = comment.substring(4 + SOURCE_URL_PREFIX.length());
+         }
+     }
+ 
      /**
       * Seek next token.
       *
       * @return tokenType of next token.
       */
!     private TokenType nextToken() {
          // Capture last token tokenType.
          last = type;
          if (type != EOF) {
  
              // Set up next token.