Hastlayer-SDK

using System;
using System.Linq;

namespace ICSharpCode.Decompiler.CSharp.Syntax;

public static class ArrayCreateExpressionExtensions
{
    public static int GetStaticLength(this ArrayCreateExpression expression)
    {
        // The array has its length explicitly specified, i.e. new int[5]-style.
        if (expression.Arguments.Count != 0)
        {
            var lengthArgument = expression.Arguments.Single();

            if (lengthArgument is not PrimitiveExpression)
            {
                throw new NotSupportedException(
                    "Only arrays with statically defined dimension length are supported. Consider adding the " +
                    "dimension sizes directly into the array initialization or use a const field. The " +
                    $"dynamically sized array creation was: {expression}{".".AddParentEntityName(expression)}");
            }

            return ((PrimitiveExpression)lengthArgument).Value.ToString().ToTechnicalInt();
        }

        // The array is initialized in-place, i.e. new[] { 1, 2, 3 }-style.
        return expression.Initializer.Elements.Count;
    }

    public static bool HasInitializer(this ArrayCreateExpression expression) => expression.Initializer.Elements.Count != 0;

    public static AstType GetElementType(this ArrayCreateExpression expression) =>
        // Sometimes instead of `new Task<uint>[2]` an array instantiation will be in form of `new Task<bool>[2][] {}`
        // even if the task is still one-dimensional. In this case its type will be a ComposedType.
        expression.Type is ComposedType composedType ? composedType.BaseType : expression.Type;
}