Hastlayer-SDK

using ICSharpCode.Decompiler.CSharp.Syntax;
using System;

namespace Hast.Transformer.Models;

/// <summary>
/// Represents the size of an array.
/// </summary>
/// <remarks>
/// <para>
/// A separate model for this so adding support for multi-dimensional arrays will be possible by extending it.
/// </para>
/// </remarks>
public interface IArraySize
{
    /// <summary>
    /// Gets the Length of the array.
    /// </summary>
    int Length { get; }
}

/// <summary>
/// Container for the sizes of statically sized arrays.
/// </summary>
public interface IArraySizeHolder
{
    /// <summary>
    /// Returns the size of the <paramref name="arrayHolder"/>.
    /// </summary>
    IArraySize GetSize(AstNode arrayHolder);

    /// <summary>
    /// Sets the <paramref name="length"/> of the <paramref name="arrayHolder"/>.
    /// </summary>
    void SetSize(AstNode arrayHolder, int length);

    /// <summary>
    /// Clones the node.
    /// </summary>
    IArraySizeHolder Clone();
}

public static class ArraySizeHolderExtensions
{
    public static IArraySize GetSizeOrThrow(this IArraySizeHolder arraySizeHolder, AstNode arrayHolder) =>
        arraySizeHolder.GetSize(arrayHolder) ?? throw new NotSupportedException(
            $"The length of the array holder \"{arrayHolder.GetFullName()}\" couldn't be statically determined. Only " +
            "arrays with dimensions defined at compile-time are supported. If the array size is actually static " +
            "just Hastlayer can't figure it out for some reason then you can configure it manually via " +
            "TransformerConfiguration by using the quoted full name.");
}