Package com.sonar.sslr.api

Class Preprocessor2

java.lang.Object
com.sonar.sslr.api.Preprocessor2
Direct Known Subclasses:
CobolPreprocessor
public abstract class Preprocessor2 extends Object
A Preprocessor can be used to modify the content of the LexerOuput before launching the parser. A proprocessor can be used for instance to replace a token or a list of tokens by another token or list of tokens.

  • Constructor Details

    • Preprocessor2

      public Preprocessor2()

  • Method Details

    • process

      public abstract boolean process(Token token, LexerOutput output)
      This method is called just before adding a new Token to the LexerOutput. The Preprocessor is able to intercept this token and do what ever it wants with it.
      Parameters:
      token - the token to preprocess
      output - the lexer output that can be used to inject any tokens.
      Returns:
      false if that token hasn't been pre-processed and true otherwise. If the method returns true, no other preprocessing operations will be done on this token and this token won't be added to the LexerOutput

    • endLexing

      public void endLexing(LexerOutput output)
      Method calls after having lexed a source code. Some additional operations can be done by the Preprocessor on the LexerOuput if required.

    • startLexing

      public void startLexing()
      Method calls before starting lexing the source code. This method can be overridden to initialize a state for instance.