CompilerServices.cs

using System;
using System.Collections.Generic;
using System.Dynamic;
using System.Reflection;
using System.Runtime.CompilerServices;
using System.Text.RegularExpressions;

namespace ServiceStack.Razor.Compilation
{
	/// <summary>
    /// Provides service methods for compilation.
    /// </summary>
    public static class CompilerServices
    {
        private static readonly Type DynamicType = typeof(DynamicObject);
        private static readonly Type ExpandoType = typeof(ExpandoObject);

        /// <summary>
        /// Determines if the specified type is an anonymous type.
        /// </summary>
        /// <param name="type">The type to check.</param>
        /// <returns>True if the type is an anonymous type, otherwise false.</returns>
        public static bool IsAnonymousType(Type type)
        {
            if (type == null)
                throw new ArgumentNullException("type");

            return (type.IsClass
                    && type.IsSealed
                    && type.BaseType == typeof(object)
                    && type.Name.StartsWith("<>")
                    && type.IsDefined(typeof(CompilerGeneratedAttribute), true));
        }

        /// <summary>
        /// Determines if the specified type is a dynamic type.
        /// </summary>
        /// <param name="type">The type to check.</param>
        /// <returns>True if the type is an anonymous type, otherwise false.</returns>
        public static bool IsDynamicType(Type type)
        {
            if (type == null)
                throw new ArgumentNullException("type");

            return (DynamicType.IsAssignableFrom(type)
                    || ExpandoType.IsAssignableFrom(type)
                    || IsAnonymousType(type));
        }

        /// <summary>
        /// Generates a random class name.
        /// </summary>
        /// <returns>A new random class name.</returns>
        public static string GenerateClassName()
        {
            return Regex.Replace(Guid.NewGuid().ToString("N"), @"[^A-Za-z]*", "");
        }

        /// <summary>
        /// Gets the public or protected constructors of the specified type.
        /// </summary>
        /// <param name="type">The target type.</param>
        /// <returns>An enumerable of constructors.</returns>
        public static IEnumerable<ConstructorInfo> GetConstructors(Type type)
        {
            if (type == null)
                throw new ArgumentNullException("type");

            var constructors = type
                .GetConstructors(BindingFlags.Public | BindingFlags.Instance);

            return constructors;
        }

        /// <summary>
        /// Gets an enumerable of all assemblies loaded in the current domain.
        /// </summary>
        /// <returns>An enumerable of loaded assemblies.</returns>
        public static IEnumerable<Assembly> GetLoadedAssemblies()
        {
            var domain = AppDomain.CurrentDomain;
            return domain.GetAssemblies();
        }
    }
}