public SemanticStack Clone()
{
SemanticStack ss = new SemanticStack();
SemanticValue[] svs = vals.ToArray();
for (int i = svs.Length - 1; i >= 0; i--)
{
ss.Push(svs[i].Clone());
}
return(ss);
}
/// <summary>
/// 开始一个流图结点的编译，继承最左前导块的语义与变量当前引用
/// </summary>
/// <param name="node"></param>
/// <param name="il"></param>
private void BeginGraphNode(FlowGraphNode node)
{
if (node.SemanticStacks.Count > 0)
{
semanticStack = node.SemanticStacks[0].Clone();
}
else
{
semanticStack = new SemanticStack();
}
if (node.VarReferencesList.Count > 0)
{
varReferences = new Dictionary <string, DAGNode>(node.VarReferencesList[0]);
}
else
{
varReferences = new Dictionary <string, DAGNode>();
}
}