关键词: 编译器生成器, 编译器前端生成器, Front, Elegant, 语法, 语义

Abstract: The expressivity in semantic domain of a compiler front-end generator for Elegant—Front is enhanced to access the expressive level of attribute grammar rules in Elegant through extending the grammar and semantics of Front using embedding text and optional grammar structures.A compiler front-end of Modelica modeling language is developed and the front-ends of Front itself，ScanGen，Diagrams are compiled using the extended Front，rusulting in that the extended Front runs well with backward compatibility，and can meet the needs of developing complex program language’s compiler front-end.

Key words: compiler generator, compiler front-end generator, Front, Elegant, grammar, semantics