Implementing of Gaussian Syntax-Analyzer Using ANTLR

Studying in how to develop a Gaussian syntax-analyzer is significant for there are many researches on chemistry soft wares. The paper develops a Gaussian analyzer using ANTLR, implementing of Gaussian syntax-analyzer using ANTLR is good at analyzing other chemistry software using ANTLR, as well as the ANTLR is discussed on how to implement syntax-analyzer. Test the Gaussian syntax-analyzer using an example as well as build a AST. Whilst the paper improve one kind of syntactical parser methods.