TypeResolutionContext.cs
74 lines
| 2.7 KiB
| text/x-csharp
|
CSharpLexer
cin
|
r289 | using System; | |
| using System.Collections.Generic; | |||
| using Implab.Diagnostics; | |||
| namespace Implab.ServiceHost.Unity { | |||
| using static Trace<TypeResolver>; | |||
| /// <summary> | |||
| /// Позволяет обойти вложенные типы и собрать цеочку из типов и параметров генериков, которые они предлагают | |||
| /// </summary> | |||
| internal class TypeResolutionContext { | |||
| readonly TypeResolver m_resolver; | |||
| readonly List<Type> m_genericParameters = new List<Type>(); | |||
| public IEnumerable<Type> GenericParameters { get { return m_genericParameters; } } | |||
| public Type ResolvedType { get; private set; } | |||
| public int ArrayRank { get; private set; } | |||
| public bool ThrowOnFail { get; private set; } | |||
| public TypeResolutionContext(TypeResolver resolver, bool throwOnFail) { | |||
| m_resolver = resolver; | |||
| ThrowOnFail = throwOnFail; | |||
| } | |||
| public Type MakeType() { | |||
| return m_genericParameters.Count > 0 ? | |||
| ResolvedType?.MakeGenericType(m_genericParameters.ToArray()) : | |||
| ResolvedType; | |||
| } | |||
| public void Visit(SpecializedTypeReference typeReference) { | |||
| typeReference.GenericType.Visit(this); | |||
| if (ResolvedType != null) { | |||
| foreach (var genericParamRef in typeReference.GenericParameters) { | |||
| var context = new TypeResolutionContext(m_resolver, ThrowOnFail); | |||
| genericParamRef.Visit(context); | |||
| m_genericParameters.Add(context.MakeType()); | |||
| } | |||
| } | |||
| } | |||
| public void Visit(NestedTypeReference typeReference) { | |||
| typeReference.DeclaringType.Visit(this); | |||
| if (ResolvedType != null) | |||
| ResolvedType = ResolvedType?.GetNestedType(typeReference.ClrName) ?? Failed(typeReference); | |||
| } | |||
| public void Visit(RootTypeReference typeReference) { | |||
| ResolvedType = m_resolver.Resolve(typeReference.Namespace, typeReference.ClrName) ?? Failed(typeReference); | |||
| } | |||
| public void Visit(ArrayTypeReference typeReference) { | |||
| var context = new TypeResolutionContext(m_resolver, ThrowOnFail); | |||
| typeReference.ItemsType.Visit(context); | |||
| ResolvedType = typeReference.Rank == 1 ? | |||
| context.MakeType()?.MakeArrayType() : | |||
| context.MakeType()?.MakeArrayType(typeReference.Rank); | |||
| } | |||
| Type Failed(TypeReference reference) { | |||
| Log($"Falied to resolve {reference}"); | |||
| if (ThrowOnFail) | |||
| throw new Exception($"Failed to resolve {reference}"); | |||
| return null; | |||
| } | |||
| } | |||
| } |