C# CodeGenContext.pop方法代码示例

 internal void GenCode(CodeGenContext context)
 {
     for (Node stmt = this; stmt != null; stmt = stmt.nd_next)
     {
         stmt.GenCode0(context);
         if (stmt.nd_next != null && context.Reachable())
             context.pop();
     }
 }

        internal override void GenCode0(CodeGenContext context)
        {
            PERWAPI.CILLabel finalLabel = context.NewLabel();

            int RescueTemp = context.CreateLocal("rescueTemp", PERWAPI.PrimitiveType.Object);
            context.ldnull();
            context.stloc(RescueTemp);

            if (ensure != null)
            {
                context.StartBlock(Clause.Try); // outer try block with finally

                context.StartBlock(Clause.Try); // inner try block with catch
            }

            GenInnerBlock(context, RescueTemp);

            if (ensure != null)
            {
                context.Goto(finalLabel);

                PERWAPI.TryBlock innerTry = context.EndTryBlock();

                context.StartBlock(Clause.Catch);
                GenRescue(context, null, 0, null);
                context.EndCatchBlock(Runtime.SystemExceptionRef, innerTry);

                PERWAPI.TryBlock outerTry = context.EndTryBlock();
                
                // Fixme: reset labels to prevent branches out of finally block.    
                context.StartBlock(Clause.Finally);
                ensure.GenCode(context);
                if (context.Reachable())
                    context.pop();
                context.endfinally();
                context.EndFinallyBlock(outerTry);

                context.CodeLabel(finalLabel);
                context.newEndPoint(location);
            }

            context.ldloc(RescueTemp);

            context.ReleaseLocal(RescueTemp, true);
        }

        internal override void GenCode0(CodeGenContext context)
        {
            CodeGenContext Begin = context.CreateMethod(FileClass(), MethAttr.PublicStatic, "Begin" + (seq++), PrimitiveType.Object,
                    new Param(ParamAttr.Default, "recv", PrimitiveType.Object),
                    new Param(ParamAttr.Default, "caller", Runtime.FrameRef));

            Begin.startMethod(this.location);

            AddScopeLocals(Begin);

            AddScopeBody(Begin);

            Begin.ReleaseLocal(0, true);

            Begin.Close();


            // Begin(recv, caller);
            context.ldarg("recv");
            context.ldloc(0);
            context.call(Begin.Method);
            context.pop();
        }

        internal void GenCode(CodeGenContext context, PERWAPI.CILLabel endLabel, int RescueTemp, int exception)
        {
            for (RESCUE_CLAUSE clause = this; clause != null; clause = clause.next)
            {
                PERWAPI.CILLabel nextClause = context.NewLabel();
                PERWAPI.CILLabel thisClause = context.NewLabel();

                context.ldc_i4(0);
                LOCAL exceptionCaught = context.StoreInLocal("caught", PERWAPI.PrimitiveType.Boolean, this.location);

                for (Node type = clause.types; type != null; type = type.nd_next)
                {
                    PERWAPI.CILLabel label1 = context.NewLabel();

                    // Precompute each separately to avoid computing a list of types
                    type.GenCode0(context);
                    LOCAL tt = context.StoreInLocal("type", PERWAPI.PrimitiveType.Object, type.location);

                    new METHOD_CALL(tt, ID.intern(Tokens.tEQQ), new AST.LOCAL(exception, type.location), type.location).GenCode(context);

                    context.ReleaseLocal(tt.local, true);

                    context.call(Runtime.Eval.Test);
                    context.brfalse(label1);
                    context.PushTrue();
                    context.stloc(exceptionCaught.local);
                    context.CodeLabel(label1);                  
                }

                context.ldloc(exceptionCaught.local);
                context.brtrue(thisClause);
                context.ReleaseLocal(exceptionCaught.local, true);

                context.br(nextClause);

                context.CodeLabel(thisClause);

                if (clause.var != null)
                {
                    clause.var.Assign(context, new AST.LOCAL(exception, clause.var.location));
                    context.pop();
                }

                if (clause.body != null)
                    clause.body.GenCode(context);
                else
                    context.ldnull();

                if (context.Reachable())
                    context.stloc(RescueTemp);

                // reset $!
                //Eval.ruby_errinfo.value = null;
                context.ldsfld(Runtime.Eval.ruby_errinfo);
                context.ldnull();
                context.stfld(Runtime.global_variable.value);

                context.Goto(endLabel);

                context.CodeLabel(nextClause);
            }
        }

        internal override void Assign(CodeGenContext context, Node rhs)
        {
            // Gen right hand sides
            ListGen mrhs;
            if (rhs is ListGen && !(rhs is MultipleRHS))
                mrhs = (ListGen)rhs;
            else
                mrhs = new ARGS(null, null, rhs, null, location, true);

            bool created;
            ISimple list = mrhs.GenArgList(context, out created);
            list.GenSimple(context);
            context.callvirt(Runtime.ArgList.CheckSingleRHS);
            int array = context.StoreInTemp("mrhs", Runtime.ArgListRef, location);

            context.ReleaseLocal(list, created);

            // Gen assignments to left hand sides
            for (LVALUE l = elements; l != null; l = (LVALUE)l.nd_next)
            {
                l.Assign(context, new MultipleRHS(array, l.location));
                context.pop();
            }

            context.ldloc(array);
            context.callvirt(Runtime.ArgList.ToRubyArray);

            context.ReleaseLocal(array, true);
        }

        internal override void GenCode0(CodeGenContext context)
        {
            Labels original = context.labels;

            // ---------------- Create new label context for loop ----------------------
            context.labels = new Labels();
            context.labels.Next = context.NewLabel();
            context.labels.Break = context.NewLabel();
            context.labels.Redo = context.NewLabel();
            context.labels.Retry = context.NewLabel();
            context.labels.Return = original.Return;

            context.CodeLabel(context.labels.Retry);

            context.newStartPoint(location);

            context.ldnull();
            context.stloc(parent_scope.returnTemp);

            context.CodeLabel(context.labels.Redo);

            if (body != null)
            {
                body.GenCode(context);
                if (context.Reachable())
                    context.pop();
            }

            context.CodeLabel(context.labels.Next);

            // if (Eval.Test(cond))
            context.newLine(cond.location);
            cond.GenCode(context);
            context.call(Runtime.Eval.Test);
            if (whileTrue)
                context.brtrue(context.labels.Retry);
            else
                context.brfalse(context.labels.Retry);

            context.CodeLabel(context.labels.Break);

            context.newEndPoint(location);

            context.ldloc(parent_scope.returnTemp);

            // --------------------- Restore Label context -------------------------
            context.labels = original;
        }