BadLogicAndExpression.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.Logic;
 
public class BadLogicAndExpression : BadBinaryExpression
{
    public BadLogicAndExpression(BadExpression left, BadExpression right, BadSourcePosition position) : base(
        left,
        right,
        position
    ) { }
 
    public static BadObject And(BadObject left, BadObject right, BadSourcePosition pos)
    {
        if (left is not IBadBoolean lBool)
        {
            throw new BadRuntimeException($"Can not apply operator '&&' to {left}. expected boolean", pos);
        }
 
        if (!lBool.Value)
        {
            return BadObject.False;
        }
 
        if (right is IBadBoolean rBool)
        {
            return rBool.Value ? BadObject.True : BadObject.False;
        }
 
        throw new BadRuntimeException($"Can not apply operator '&&' to {left} and {right}", pos);
    }
 
    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();
 
        if (left is not IBadBoolean lBool)
        {
            throw new BadRuntimeException($"Can not apply operator '{GetSymbol()}' to {left}. expected boolean", Position);
        }
 
        if (!lBool.Value)
        {
            yield return BadObject.False;
 
            yield break;
        }
 
        BadObject right = BadObject.Null;
 
        foreach (BadObject o in Right.Execute(context))
        {
            right = o;
 
            yield return o;
        }
 
        right = right.Dereference();
 
        if (right is not IBadBoolean rBool)
        {
            throw new BadRuntimeException($"Can not apply operator '{GetSymbol()}' to {left} and {right}", Position);
        }
 
        if (rBool.Value)
        {
            yield return BadObject.True;
        }
        else
        {
            yield return BadObject.False;
        }
    }
 
    protected override string GetSymbol()
    {
        return "&&";
    }
}