void PopAndAssert(HappySymbolTable st)
{
DebugAssert.AreEqual(st, _scopeStack.Pop(), "Item at top of scope stack was not the current node");
}
public override void BeforeVisit(ForWhereClause node)
{
var whereSymbolTable = new HappySymbolTable("where(" + node.LoopVariableName + ")", this.TopSymbolTable);
whereSymbolTable.Add(node.LoopVariableName);
node.GetExtension<ScopeExtension>().SymbolTable = whereSymbolTable;
_scopeStack.Push(whereSymbolTable);
base.BeforeVisit(node);
}