当前位置: 首页>>代码示例>>C#>>正文


C# CodeGen.IsGenerator方法代码示例

本文整理汇总了C#中CodeGen.IsGenerator方法的典型用法代码示例。如果您正苦于以下问题:C# CodeGen.IsGenerator方法的具体用法?C# CodeGen.IsGenerator怎么用?C# CodeGen.IsGenerator使用的例子?那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在CodeGen的用法示例。


在下文中一共展示了CodeGen.IsGenerator方法的1个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的C#代码示例。

示例1: Emit

        // ***WITH STATEMENT CODE GENERATION ALGORITHM***
        //
        //GRAMMAR :=
        //with EXPR as VAR:
        //    BLOCK
        //
        //CODE GEN :=
        //
        //mgr = (EXPR)
        //exit = mgr.__exit__  # Not calling it yet
        //value = mgr.__enter__()
        //exc = True
        //isTryYielded = False
        //try:
        //
        //   VAR = value  # Only if "as VAR" is present
        //   BLOCK
        //   // if yield happens in the Block,
        //   // then isTryYielded is set to True by Yield's Code Gen
        //except:
        //   # The exceptional case is handled here
        //   exc = False
        //   if not exit(*sys.exc_info()):
        //        raise
        //   # The exception is consumed if exit() returns true
        //finally:
        //    # The normal and non-local-goto cases are handled here
        //    if  isTryYielded = False && exc == True :
        //        exit(None, None, None)
        internal override void Emit(CodeGen cg)
        {
            Slot exc = null;
            Slot isTryYielded = null;
            Slot exit = null;

            if (cg.IsGenerator()) {
                exc = cg.Names.GetTempSlot("with", typeof(object));
                isTryYielded = cg.Names.GetTempSlot("with", typeof(object));
                exit = cg.Names.GetTempSlot("with", typeof(object));
            } else {
                exc = cg.GetLocalTmp(typeof(object));
                isTryYielded = cg.GetLocalTmp(typeof(object));
                exit = cg.GetLocalTmp(typeof(object));
            }

            // mgr = (EXPR)
            Slot mgr = cg.GetLocalTmp(typeof(object));
            contextManager.Emit(cg);
            mgr.EmitSet(cg);

            // exit = mgr.__exit__ # not calling it yet
            cg.EmitCallerContext();
            mgr.EmitGet(cg);
            cg.EmitSymbolId("__exit__");
            cg.EmitCall(typeof(Ops), "GetAttr");
            exit.EmitSet(cg);

            mgr.EmitGet(cg);
            cg.FreeLocalTmp(mgr);
            cg.EmitSymbolId("__enter__");
            cg.EmitObjectArray(new Expression[0]);
            cg.EmitCall(typeof(Ops), "Invoke", new Type[] { typeof(object), typeof(SymbolId), typeof(object[]) });
            Slot value = cg.GetLocalTmp(typeof(object));
            value.EmitSet(cg);

            // exc = True
            cg.EmitConstantBoxed(true);
            exc.EmitSet(cg);

            Slot choiceVar = null;

            if (yieldTargets != null && yieldTargets.Count > 0) {
                Label startOfBlock = cg.DefineLabel();
                choiceVar = cg.GetLocalTmp(typeof(int));
                cg.EmitInt(-1);
                choiceVar.EmitSet(cg);
                cg.Emit(OpCodes.Br, startOfBlock);

                int index = 0;
                foreach (YieldTarget yt in yieldTargets) {
                    cg.MarkLabel(yt.TopBranchTarget);
                    cg.EmitInt(index++);
                    choiceVar.EmitSet(cg);
                    cg.Emit(OpCodes.Br, startOfBlock);
                }

                cg.MarkLabel(startOfBlock);
            }

            cg.EmitConstantBoxed(false);
            isTryYielded.EmitSet(cg);

            Label beforeFinally = cg.DefineLabel();

            cg.PushWithTryBlock(isTryYielded);
            cg.BeginExceptionBlock();

            if (yieldTargets != null && yieldTargets.Count > 0) {
                int index = 0;
                foreach (YieldTarget yt in yieldTargets) {
//.........这里部分代码省略.........
开发者ID:FabioNascimento,项目名称:DICommander,代码行数:101,代码来源:Statements.cs


注:本文中的CodeGen.IsGenerator方法示例由纯净天空整理自Github/MSDocs等开源代码及文档管理平台,相关代码片段筛选自各路编程大神贡献的开源项目,源码版权归原作者所有,传播和使用请参考对应项目的License;未经允许,请勿转载。