ParserATNFactory.java 文件源码

public ParserATNFactory(Grammar g) {
    if (g == null) {
        throw new NullPointerException("g");
    }

    this.g = g;

    ATNType atnType = g instanceof LexerGrammar ? ATNType.LEXER : ATNType.PARSER;
    int maxTokenType = g.getMaxTokenType();
    this.atn = new ATN(atnType, maxTokenType);
}