public bool Compile(string command, out List <Command> commands, out string errorMessage)
{
var antlrInputStream = new AntlrInputStream(command);
//词法分析
var lexer = new EMacroLexer(antlrInputStream);
var tokenStream = new CommonTokenStream(lexer);
//语法分析
var parser = new EMacroParser(tokenStream);
parser.ErrorHandler = new CompileErrorStrategy(); //错误自动退出
parser.RemoveErrorListeners();
CompileErrorListener compileErrorListener = new CompileErrorListener(); //输出错误信息
parser.AddErrorListener(compileErrorListener);
EMacroParser.StatContext tree = null; //分析树
try
{
tree = parser.stat();
}
catch
{
errorMessage = compileErrorListener.GetErrorMessage();
commands = new List <Command>();
return(false);
}
//遍历分析树
var walker = new ParseTreeWalker();
commands = new List <Command>();
walker.Walk(new CompileListener(commands), tree);
errorMessage = null;
return(true);
}
/// <summary>
/// Exit a parse tree produced by <see cref="EMacroParser.stat"/>.
/// <para>The default implementation does nothing.</para>
/// </summary>
/// <param name="context">The parse tree.</param>
public virtual void ExitStat([NotNull] EMacroParser.StatContext context)
{
}
