BadAddExpression.cs

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using BadScript2.Common;
using BadScript2.Runtime;
using BadScript2.Runtime.Error;
using BadScript2.Runtime.Objects;
using BadScript2.Runtime.Objects.Native;
 
namespace BadScript2.Parser.Expressions.Binary.Math;
 
public class BadAddExpression : BadBinaryExpression
{
    public BadAddExpression(BadExpression left, BadExpression right, BadSourcePosition position) : base(
        left,
        right,
        position
    ) { }
 
 
    protected override string GetSymbol()
    {
        return "+";
    }
 
    public static BadObject Add(BadObject left, BadObject right, BadSourcePosition pos)
    {
        switch (left)
        {
            case IBadString lStr when right is IBadNative rNative:
                return BadObject.Wrap(lStr.Value + rNative.Value);
            case IBadString lStr:
                return BadObject.Wrap(lStr.Value + right);
            case IBadNumber lNum when right is IBadString rStr:
                return BadObject.Wrap(lNum.Value + rStr.Value);
            case IBadNumber lNum when right is IBadNumber rNum:
                return BadObject.Wrap(lNum.Value + rNum.Value);
            case IBadNumber:
                break;
            case IBadBoolean lBool:
            {
                if (right is IBadString rStr)
                {
                    return BadObject.Wrap(lBool.Value + rStr.Value);
                }
 
                break;
            }
            default:
            {
                if (right is IBadString rStr)
                {
                    return BadObject.Wrap(left + rStr.Value);
                }
 
                break;
            }
        }
 
        throw new BadRuntimeException($"Can not apply operator '+' to {left} and {right}", pos);
    }
 
    public static IEnumerable<BadObject> AddWithOverride(
        BadExecutionContext? context,
        BadObject leftRef,
        BadObject right,
        BadSourcePosition position)
    {
        BadObject left = leftRef.Dereference();
 
        if (left.HasProperty(BadStaticKeys.ADD_OPERATOR_NAME, context?.Scope))
        {
            foreach (BadObject o in ExecuteOperatorOverride(
                         left,
                         right,
                         context!,
                         BadStaticKeys.ADD_OPERATOR_NAME,
                         position
                     ))
            {
                yield return o;
            }
        }
        else
        {
            yield return Add(left, right, position);
        }
    }
 
    protected override IEnumerable<BadObject> InnerExecute(BadExecutionContext context)
    {
        BadObject left = BadObject.Null;
 
        foreach (BadObject o in Left.Execute(context))
        {
            left = o;
 
            yield return o;
        }
 
        left = left.Dereference();
        BadObject right = BadObject.Null;
 
        foreach (BadObject o in Right.Execute(context))
        {
            right = o;
 
            yield return o;
        }
 
        right = right.Dereference();
 
        foreach (BadObject? o in AddWithOverride(context, left, right, Position))
        {
            yield return o;
        }
    }
}