protected override sealed void Execute(SmallBasicEngine engine)
{
BaseValue second = engine.EvaluationStack.Pop();
BaseValue first = engine.EvaluationStack.Pop();
engine.EvaluationStack.Push(this.Execute(first, second));
}
protected override void Execute(SmallBasicEngine engine)
{
BaseValue value = engine.EvaluationStack.Pop();
executeAux(new ArrayValue(engine.Memory), this.array, this.indicesCount);
BaseValue executeAux(ArrayValue memory, string index, int remainingIndices)
{
if (remainingIndices == 0)
{
memory.SetIndex(index, value);
}
else
{
ArrayValue nextMemory =
memory.TryGetValue(index, out BaseValue elementValue) && elementValue is ArrayValue elementArrayValue
? elementArrayValue
: new ArrayValue();
string nextIndex = engine.EvaluationStack.Pop().ToString();
memory.SetIndex(index, executeAux(nextMemory, nextIndex, remainingIndices - 1));
}
return(memory);
}
}
protected override void Execute(SmallBasicEngine engine)
{
BaseValue value = engine.EvaluationStack.Pop();
executeAux(engine.Memory, this.array, this.indicesCount);
BaseValue executeAux(Dictionary <string, BaseValue> memory, string index, int remainingIndices)
{
if (remainingIndices == 0)
{
memory[index] = value;
}
else
{
Dictionary <string, BaseValue> nextMemory =
memory.TryGetValue(index, out BaseValue elementValue) && elementValue is ArrayValue elementArrayValue
? elementArrayValue.ToDictionary()
: new Dictionary <string, BaseValue>();
string nextIndex = engine.EvaluationStack.Pop().ToString();
memory[index] = executeAux(nextMemory, nextIndex, remainingIndices - 1);
}
return(new ArrayValue(memory));
}
}
protected override BaseValue Execute(BaseValue first, BaseValue second)
{
if (first is NumberValue && second is NumberValue)
{
return(new NumberValue(first.ToNumber() + second.ToNumber()));
}
return(StringValue.Create(first.ToString() + second.ToString()));
}
protected override BaseValue Execute(BaseValue first, BaseValue second)
{
decimal divisor = second.ToNumber();
if (divisor == 0)
{
divisor = 1;
}
return(new NumberValue(first.ToNumber() / divisor));
}
public PushValueInstruction(BaseValue value, TextRange range)
: base(range)
{
this.value = value;
}
protected abstract BaseValue Execute(BaseValue value);
protected override sealed void Execute(SmallBasicEngine engine)
{
BaseValue value = engine.EvaluationStack.Pop();
engine.EvaluationStack.Push(this.Execute(value));
}
protected abstract BaseValue Execute(BaseValue first, BaseValue second);
protected override BaseValue Execute(BaseValue first, BaseValue second) => new BooleanValue(first.ToNumber() >= second.ToNumber());
protected override BaseValue Execute(BaseValue first, BaseValue second) => new BooleanValue(first.ToString() != second.ToString());
protected override BaseValue Execute(BaseValue value) => new NumberValue(-value.ToNumber());
protected override BaseValue Execute(BaseValue first, BaseValue second) => new NumberValue(first.ToNumber() * second.ToNumber());