public PrgState execute(PrgState state)
{
MapInterface<String, int> symTbl = state.SymTable;
HeapInterface<int> heap = state.HeapTable;
heap.Update (symTbl [Id], Exp.eval (symTbl, heap));
return null;
}
public PrgState execute(PrgState state)
{
ListInterface<int> output = state.Output;
MapInterface<String, int> symTbl = state.SymTable;
HeapInterface<int> heap = state.HeapTable;
output.Add (Exp.eval (symTbl, heap));
return null;
}
public PrgState execute(PrgState state)
{
MapInterface<String, int> symTbl = state.SymTable;
HeapInterface<int> heap = state.HeapTable;
int val = exp.eval (symTbl, heap);
symTbl [id] = val;
return null;
}
public PrgState execute(PrgState state)
{
Exp difSwitch = new ArithExp (Exp, "-", ExpCase2);
Exp difSwitch2 = new ArithExp (Exp, "-", ExpCase1);
IStmt ifSwitch = new IfStmt (difSwitch2, DefaultCase, Case1);
IStmt switchStmt = new IfStmt (difSwitch, ifSwitch, Case2);
state.ExeStack.Push (switchStmt);
return null;
}
public PrgState execute(PrgState state)
{
MapInterface<String, int> symTbl = state.SymTable;
HeapInterface<int> heap = state.HeapTable;
if (Exp.eval (symTbl, heap) != 0) {
state.ExeStack.Push (this);
state.ExeStack.Push (this.Stmt);
}
return null;
}
public PrgState execute(PrgState state)
{
state.ExeStack.Push (new IfStmt (Exp, ThenS, new SkipStmt ()));
return null;
}
public PrgState execute(PrgState state)
{
state.ExeStack.Push (new CompStmt (stmt, new WhileStmt (new NotExp (exp), stmt)));
return null;
}
public PrgState execute(PrgState state)
{
state.ExeStack.Push(new CompStmt(stmt, new WhileStmt(new NotExp(exp), stmt)));
return(null);
}
public PrgState execute(PrgState state)
{
state.ExeStack.Push(second);
state.ExeStack.Push(first);
return(null);
}
public PrgState execute(PrgState state)
{
state.ExeStack.Push (second);
state.ExeStack.Push (first);
return null;
}