private static CodeFile BuildStructure(AntlrInputStream inputStream)
{
if (inputStream == null)
{
throw new ArgumentNullException(nameof(inputStream));
}
CdeltaLexer lexer = new CdeltaLexer(inputStream);
CommonTokenStream tokenStream = new CommonTokenStream(lexer);
CdeltaParser parser = new CdeltaParser(tokenStream);
CdeltaParser.CodeFileContext result = parser.codeFile();
CodeFile codeFile = new CodeFile();
CdeltaGrammarVisitor visitor = new CdeltaGrammarVisitor(inputStream.ToString(), ref codeFile);
visitor.Visit(result);
codeFile.Finish();
codeFile.Verify();
return(codeFile);
}