How to use

start

method

in

com.intellij.lexer.Lexer

@Override
public void start(@NotNull CharSequence buffer, int startOffset, int endOffset, int initialState) {
  eexLexer.start(buffer, startOffset, endOffset, initialState & 0xFFFF);
  if (eexLexer.getTokenType() == ELIXIR) {
    elixirLexer.start(buffer, startOffset, endOffset);
  } else {
    elixirLexer.start(buffer, startOffset, endOffset);
  }
}

protected void start(@NotNull CharSequence charSequence) {
  lexer.start(charSequence);
}

private void restoreElixirPosition(@Nullable LexerPosition elixirPosition) {
  if (elixirPosition != null) {
    elixirLexer.start(getBufferSequence(), eexLexer.getTokenStart(), eexLexer.getTokenEnd());
    elixirLexer.restore(elixirPosition);
  }
}

public void advance() {
  if (eexLexer.getTokenType() == ELIXIR) {
    elixirLexer.advance();
    if (elixirLexer.getTokenType() == null) {
      eexLexer.advance();
    }
  } else {
    eexLexer.advance();
    if (eexLexer.getTokenType() == ELIXIR) {
      // start automatically does equivalent of `advance` since `elixirLexer` is also a look-ahead lexer
      elixirLexer.start(getBufferSequence(), eexLexer.getTokenStart(), eexLexer.getTokenEnd());
    }
  }
}

@Override
public void start(@NotNull CharSequence buffer, int startOffset, int endOffset, int initialState) {
 if (initialState == 0 && myTryCatchEnabled) {
  initialState = -1;
 }
 myMainLexer.start(buffer, startOffset, endOffset, initialState);
 myTokenStart = myTokenEnd = startOffset;
 myTokenType = null;
 myIsSublexing = false;
}

  @Override
  public void start(@NotNull CharSequence buffer, int startOffset, int endOffset, int initialState) {
    int newStartOffset = (startOffset == 0)
        ? prefix.length()
        : startOffset;

    int newEndOffset = (endOffset == buffer.length())
        ? endOffset - suffix.length()
        : endOffset;

    CharSequence newBuffer = buffer.subSequence(newStartOffset, newEndOffset);
    myDelegate.start(newBuffer, 0, newBuffer.length(), initialState);

    this.afterPrefix = false;
    this.delegateEOF = false;
    this.afterEOF = false;
  }
}

private void initTokenListAndCharSequence(Lexer lexer) {
  lexer.start(processedText);