我有一个ParseTree监听器实现,用于在标准VBA模块中获取全局作用域声明:
public class DeclarationSectionListener : DeclarationListener
{
private bool _insideProcedure;
public override void EnterVariableStmt(VisualBasic6Parser.VariableStmtContext context)
{
var visibility = context.visibility();
if (!_insideProcedure && visibility == null
|| visibility.GetText() == Tokens.Public
|| visibility.GetText() == Tokens.Global)
{
base.EnterVariableStmt(context);
}
}
public override void EnterConstStmt(VisualBasic6Parser.ConstStmtContext context)
{
var visibility = context.visibility();
if (!_insideProcedure && visibility == null
|| visibility.GetText() == Tokens.Public
|| visibility.GetText() == Tokens.Global)
{
base.EnterConstStmt(context);
}
}
public override void EnterArg(VisualBasic6Parser.ArgContext context)
{
return;
}
public override void EnterSubStmt(VisualBasic6Parser.SubStmtContext context)
{
_insideProcedure = true;
}
public override void EnterFunctionStmt(VisualBasic6Parser.FunctionStmtContext context)
{
_insideProcedure = true;
}
public override void EnterPropertyGetStmt(VisualBasic6Parser.PropertyGetStmtContext context)
{
_insideProcedure = true;
}
public override void EnterPropertyLetStmt(VisualBasic6Parser.PropertyLetStmtContext context)
{
_insideProcedure = true;
}
public override void ExitPropertySetStmt(VisualBasic6Parser.PropertySetStmtContext context)
{
_insideProcedure = true;
}
}
有没有办法告诉树行者停止行走?说我有一个这样的VBA模块:
Public Const foo = 123
Public bar As String
Public Sub DoSomething()
' some code
End Sub
' ...
' 10K more lines of code
' ...
Private Function GetSomething() As String
' some code
End Function
我希望树浏览器在输入
Public Sub DoSomething()
时立即停止分析树,因为我对下面的内容不感兴趣。目前,我正在遍历整个分析树,只是在过程范围内不做任何事情。从解析树监听器实现中,是否有一种方法告诉步行者停止步行该树?
最佳答案
是的,您可以执行以下任一操作:
ParseTreeWalker
的新类,并提供您自己的 walk
实现,该实现了解您需要的取消概念。从current implementation of walk
开始并对其进行修改以满足您的需求是很有意义的。 关于c# - 步行者可以停下来吗?,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/28529041/