public override void VisitUnboxAnyInstruction(UnboxAnyInstruction instruction)
{
ControlState.EvaluationStack.PopValue(out CilValueReference objRef);
var obj = ManagedMemory.Load(objRef);
var type = instruction.TypeSpec.GetCilType(_program);
var value = type.Unbox(obj, ManagedMemory, _program);
ControlState.EvaluationStack.PushValue(value);
ControlState.MoveToNextInstruction();
}
public override CILInstructionType BuildNode(ParseTreeNode node)
{
var instrTypeParseTreeNode = node.GetFirstChildWithGrammarName(GrammarNames.INSTR_TYPE);
CILInstructionType result = null;
var boxParseTreeNode = instrTypeParseTreeNode?.GetFirstChildWithGrammarName(GrammarNames.keyword_box);
if (boxParseTreeNode != null)
{
result = new BoxInstruction();
}
var newarrParseTreeNode = instrTypeParseTreeNode?.GetFirstChildWithGrammarName(GrammarNames.keyword_newarr);
if (newarrParseTreeNode != null)
{
result = new NewArrayInstruction();
}
var unboxanyParseTreeNode = instrTypeParseTreeNode?.GetFirstChildWithGrammarName(GrammarNames.keyword_unboxany);
if (unboxanyParseTreeNode != null)
{
result = new UnboxAnyInstruction();
}
if (result != null)
{
var typeSpecParseTreeNode = node.GetFirstChildWithGrammarName(GrammarNames.typeSpec);
result.TypeSpecification = TypeSpecParseTreeNodeHelper.GetValue(typeSpecParseTreeNode);
return(result);
}
throw new ArgumentException("Cannot recognize CIL instruction type.");
}
public abstract void VisitUnboxAnyInstruction(UnboxAnyInstruction instruction);
