protected override object DoEvaluate(ScriptThread thread)
{
thread.CurrentNode = this;
if (children == null)
{
throw new ParserException();
}
if (children.Length == 1)
{
var e = children[0].Term switch
{
KeyTerm key => key.Text == "true" ? true : key.Text == "false" ? false : key.Text == "null" ? null : throw new ParserException("Invalid"),
IdentifierTerminal => new IdentifierNode(children[0].AsString),
_ => children[0].Evaluate(thread),
};
thread.CurrentNode = Parent;
// EbisterNodeでなければおそらくリテラルの即値（としておく）
return(e is EbisterNode node ? node : new LiteralNode(EbiValueBase.ToEbiObject(e)));
}
else if (children.Length == 3)
{
if (children[0]?.Evaluate(thread) is not ExpressionNode left)
{
throw new ParserException();
}
if (children[1].Term is not KeyTerm t)
{
throw new ParserException();
}
if (children[2]?.Evaluate(thread) is not ExpressionNode right)
{
throw new ParserException();
}
thread.CurrentNode = Parent;
return(new BinaryExpressionNode(t.Text, left, right));
}
else
{
throw new ParserException("invalid children size");
}
}
public LiteralNode(EbiValueBase value) => Value = value;
public EbiVariable(EbiValueBase value) : base(value)
{
}
public EbiVariable(EbiValueBase value, EbiType suitableType) : base(value, suitableType)
{
}
public void Set(EbiValueBase value) => Value = value;
