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Proper type name parser for native AOT compiler
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.../tools/aot/ILCompiler.Compiler/Compiler/DependencyAnalysis/ReflectionMethodBodyScanner.cs
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src/coreclr/tools/aot/ILCompiler.Compiler/Compiler/DependencyAnalysis/TypeNameParser.cs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,141 @@ | ||
| // Licensed to the .NET Foundation under one or more agreements. | ||
| // The .NET Foundation licenses this file to you under the MIT license. | ||
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| using System.Collections.Generic; | ||
| using System.Diagnostics; | ||
| using System.IO; | ||
| using System.Reflection; | ||
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| using Internal.TypeSystem; | ||
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| namespace System.Reflection | ||
| { | ||
| internal unsafe ref partial struct TypeNameParser | ||
| { | ||
| private TypeSystemContext _context; | ||
| private ModuleDesc _callingModule; | ||
| private List<ModuleDesc> _referencedModules; | ||
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| public static TypeDesc ResolveType(string name, ModuleDesc callingModule, TypeSystemContext context, List<ModuleDesc> referencedModules) | ||
| { | ||
| return new System.Reflection.TypeNameParser(name) | ||
| { | ||
| _context = context, | ||
| _callingModule = callingModule, | ||
| _referencedModules = referencedModules | ||
| }.Parse()?.Value; | ||
| } | ||
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| private sealed class Type | ||
| { | ||
| public Type(TypeDesc type) => Value = type; | ||
| public TypeDesc Value { get; } | ||
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| public Type MakeArrayType() => new Type(Value.MakeArrayType()); | ||
| public Type MakeArrayType(int rank) => new Type(Value.MakeArrayType(rank)); | ||
| public Type MakePointerType() => new Type(Value.MakePointerType()); | ||
| public Type MakeByRefType() => new Type(Value.MakeByRefType()); | ||
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| public Type MakeGenericType(Type[] typeArguments) | ||
| { | ||
| TypeDesc[] instantiation = new TypeDesc[typeArguments.Length]; | ||
| for (int i = 0; i < typeArguments.Length; i++) | ||
| instantiation[i] = typeArguments[i].Value; | ||
| return new Type(((MetadataType)Value).MakeInstantiatedType(instantiation)); | ||
| } | ||
| } | ||
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| private static bool CheckTopLevelAssemblyQualifiedName() => true; | ||
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| private Type GetType(string typeName, ReadOnlySpan<string> nestedTypeNames, string assemblyNameIfAny) | ||
| { | ||
| ModuleDesc module = null; | ||
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| if (assemblyNameIfAny != null) | ||
| { | ||
| AssemblyName an = TryParseAssemblyName(assemblyNameIfAny); | ||
| if (an != null) | ||
| module = _context.ResolveAssembly(an, throwIfNotFound: false); | ||
| } | ||
| else | ||
| { | ||
| module = _callingModule; | ||
| } | ||
|
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| if (module == null) | ||
| return null; | ||
|
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| Type type = GetTypeCore(module, typeName, nestedTypeNames); | ||
| if (type != null) | ||
| { | ||
| _referencedModules?.Add(module); | ||
| return type; | ||
| } | ||
|
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| // If it didn't resolve and wasn't assembly-qualified, we also try core library | ||
| if (assemblyNameIfAny == null) | ||
| { | ||
| type = GetTypeCore(_context.SystemModule, typeName, nestedTypeNames); | ||
| if (type != null) | ||
| { | ||
| _referencedModules?.Add(_context.SystemModule); | ||
| return type; | ||
| } | ||
| } | ||
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| return null; | ||
| } | ||
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| private static AssemblyName TryParseAssemblyName(string assemblyName) | ||
| { | ||
| try | ||
| { | ||
| return new AssemblyName(assemblyName); | ||
| } | ||
| catch (FileLoadException) | ||
| { | ||
| return null; | ||
| } | ||
| catch (ArgumentException) | ||
| { | ||
| return null; | ||
| } | ||
| } | ||
|
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| private static Type GetTypeCore(ModuleDesc module, string typeName, ReadOnlySpan<string> nestedTypeNames) | ||
| { | ||
| string typeNamespace, name; | ||
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| int separator = typeName.LastIndexOf('.'); | ||
| if (separator <= 0) | ||
| { | ||
| typeNamespace = ""; | ||
| name = typeName; | ||
| } | ||
| else | ||
| { | ||
| if (typeName[separator - 1] == '.') | ||
| separator--; | ||
| typeNamespace = typeName.Substring(0, separator); | ||
| name = typeName.Substring(separator + 1); | ||
| } | ||
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| MetadataType type = module.GetType(typeNamespace, name, throwIfNotFound: false); | ||
| if (type == null) | ||
| return null; | ||
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| for (int i = 0; i < nestedTypeNames.Length; i++) | ||
| { | ||
| type = type.GetNestedType(nestedTypeNames[i]); | ||
| if (type == null) | ||
| return null; | ||
| } | ||
|
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| return new Type(type); | ||
| } | ||
|
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| private static void ParseError() | ||
| { | ||
| } | ||
| } | ||
| } |
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