Antlr（ANother Tool for Language Recognition）是一个工具，它为我们构造自己的识别器（recognizers）、编译器（compiler）和转换器（translators）提供了一个基础。通过定义自己的语言规则，Antlr可以为我们生成相应的语言解析器，这样便可以省却了自己全手工打造的劳苦。-ANTLR, ANother Tool for Language Recognition, (formerly PCCTS) is a language tool that provides a

fr a mework for constructing recognizers, compilers, and translators from grammatical descr iptions containing Java, C++, or C# actions [You can use PCCTS 1.xx to generate C?based parsers].