In the aspect of syntax analysis semantic analysis and the intermediate code generation of system front an abstract syntax tree is built after syntax analysis and semantic analysis and then this abstract syntax tree is traversed to generate the intermediate code .

在系统前端语法分析、语义分析及中间代码生成方面，先经过 语法、语义分析建立抽象语法 树，然后对抽象语法树进行遍历生成中间 代码。