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596 lines
20 KiB
596 lines
20 KiB
using System; |
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using System.Collections.Immutable; |
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using System.Reflection; |
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using System.Reflection.Metadata; |
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using System.Reflection.Metadata.Ecma335; |
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using System.Reflection.PortableExecutable; |
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|
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using ICSharpCode.Decompiler.TypeSystem; |
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using ICSharpCode.Decompiler.Util; |
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|
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using SRM = System.Reflection.Metadata; |
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|
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namespace ICSharpCode.Decompiler |
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{ |
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public static partial class SRMExtensions |
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{ |
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public static bool HasFlag(this TypeDefinition typeDefinition, TypeAttributes attribute) |
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=> (typeDefinition.Attributes & attribute) == attribute; |
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public static bool HasFlag(this MethodDefinition methodDefinition, MethodAttributes attribute) |
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=> (methodDefinition.Attributes & attribute) == attribute; |
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public static bool HasFlag(this FieldDefinition fieldDefinition, FieldAttributes attribute) |
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=> (fieldDefinition.Attributes & attribute) == attribute; |
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public static bool HasFlag(this PropertyDefinition propertyDefinition, PropertyAttributes attribute) |
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=> (propertyDefinition.Attributes & attribute) == attribute; |
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public static bool HasFlag(this EventDefinition eventDefinition, EventAttributes attribute) |
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=> (eventDefinition.Attributes & attribute) == attribute; |
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|
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public static bool IsTypeKind(this HandleKind kind) => |
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kind == HandleKind.TypeDefinition || kind == HandleKind.TypeReference |
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|| kind == HandleKind.TypeSpecification; |
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public static bool IsMemberKind(this HandleKind kind) => |
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kind == HandleKind.MethodDefinition || kind == HandleKind.PropertyDefinition |
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|| kind == HandleKind.FieldDefinition || kind == HandleKind.EventDefinition |
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|| kind == HandleKind.MemberReference || kind == HandleKind.MethodSpecification; |
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public static bool IsEntityHandle(this Handle handle) => |
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handle.IsNil || (byte)handle.Kind < 112; |
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public static bool IsValueType(this TypeDefinitionHandle handle, MetadataReader reader) |
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{ |
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return reader.GetTypeDefinition(handle).IsValueType(reader); |
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} |
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public static bool IsValueType(this TypeDefinition typeDefinition, MetadataReader reader) |
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{ |
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EntityHandle baseType = typeDefinition.GetBaseTypeOrNil(); |
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if (baseType.IsNil) |
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return false; |
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if (baseType.IsKnownType(reader, KnownTypeCode.Enum)) |
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return true; |
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if (!baseType.IsKnownType(reader, KnownTypeCode.ValueType)) |
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return false; |
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var thisType = typeDefinition.GetFullTypeName(reader); |
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return !thisType.IsKnownType(KnownTypeCode.Enum); |
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} |
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public static bool IsEnum(this TypeDefinitionHandle handle, MetadataReader reader) |
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{ |
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return reader.GetTypeDefinition(handle).IsEnum(reader); |
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} |
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public static bool IsEnum(this TypeDefinition typeDefinition, MetadataReader reader) |
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{ |
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EntityHandle baseType = typeDefinition.GetBaseTypeOrNil(); |
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if (baseType.IsNil) |
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return false; |
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return baseType.IsKnownType(reader, KnownTypeCode.Enum); |
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} |
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public static bool IsEnum(this TypeDefinitionHandle handle, MetadataReader reader, |
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out PrimitiveTypeCode underlyingType) |
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{ |
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return reader.GetTypeDefinition(handle).IsEnum(reader, out underlyingType); |
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} |
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public static bool IsEnum(this TypeDefinition typeDefinition, MetadataReader reader, |
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out PrimitiveTypeCode underlyingType) |
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{ |
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underlyingType = 0; |
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EntityHandle baseType = typeDefinition.GetBaseTypeOrNil(); |
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if (baseType.IsNil) |
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return false; |
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if (!baseType.IsKnownType(reader, KnownTypeCode.Enum)) |
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return false; |
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foreach (var handle in typeDefinition.GetFields()) |
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{ |
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var field = reader.GetFieldDefinition(handle); |
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if ((field.Attributes & FieldAttributes.Static) != 0) |
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continue; |
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var blob = reader.GetBlobReader(field.Signature); |
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if (blob.ReadSignatureHeader().Kind != SignatureKind.Field) |
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return false; |
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underlyingType = (PrimitiveTypeCode)blob.ReadByte(); |
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return true; |
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} |
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return false; |
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} |
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public static bool IsDelegate(this TypeDefinitionHandle handle, MetadataReader reader) |
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{ |
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return reader.GetTypeDefinition(handle).IsDelegate(reader); |
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} |
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public static bool IsDelegate(this TypeDefinition typeDefinition, MetadataReader reader) |
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{ |
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var baseType = typeDefinition.GetBaseTypeOrNil(); |
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return !baseType.IsNil && baseType.IsKnownType(reader, KnownTypeCode.MulticastDelegate); |
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} |
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public static bool HasBody(this MethodDefinition methodDefinition) |
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{ |
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const MethodAttributes noBodyAttrs = MethodAttributes.Abstract | MethodAttributes.PinvokeImpl; |
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const MethodImplAttributes noBodyImplAttrs = MethodImplAttributes.InternalCall |
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| MethodImplAttributes.Native | MethodImplAttributes.Unmanaged | MethodImplAttributes.Runtime; |
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return (methodDefinition.Attributes & noBodyAttrs) == 0 && |
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(methodDefinition.ImplAttributes & noBodyImplAttrs) == 0 && |
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methodDefinition.RelativeVirtualAddress > 0; |
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} |
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public static int GetCodeSize(this MethodBodyBlock body) |
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{ |
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if (body == null) |
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throw new ArgumentNullException(nameof(body)); |
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|
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return body.GetILReader().Length; |
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} |
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public static MethodDefinitionHandle GetAny(this PropertyAccessors accessors) |
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{ |
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if (!accessors.Getter.IsNil) |
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return accessors.Getter; |
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return accessors.Setter; |
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} |
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public static MethodDefinitionHandle GetAny(this EventAccessors accessors) |
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{ |
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if (!accessors.Adder.IsNil) |
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return accessors.Adder; |
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if (!accessors.Remover.IsNil) |
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return accessors.Remover; |
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return accessors.Raiser; |
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} |
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public static TypeDefinitionHandle GetDeclaringType(this EntityHandle entity, MetadataReader metadata) |
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{ |
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switch (entity.Kind) |
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{ |
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case HandleKind.TypeDefinition: |
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var td = metadata.GetTypeDefinition((TypeDefinitionHandle)entity); |
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return td.GetDeclaringType(); |
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case HandleKind.FieldDefinition: |
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var fd = metadata.GetFieldDefinition((FieldDefinitionHandle)entity); |
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return fd.GetDeclaringType(); |
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case HandleKind.MethodDefinition: |
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var md = metadata.GetMethodDefinition((MethodDefinitionHandle)entity); |
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return md.GetDeclaringType(); |
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case HandleKind.EventDefinition: |
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var ed = metadata.GetEventDefinition((EventDefinitionHandle)entity); |
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return metadata.GetMethodDefinition(ed.GetAccessors().GetAny()).GetDeclaringType(); |
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case HandleKind.PropertyDefinition: |
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var pd = metadata.GetPropertyDefinition((PropertyDefinitionHandle)entity); |
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return metadata.GetMethodDefinition(pd.GetAccessors().GetAny()).GetDeclaringType(); |
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default: |
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throw new ArgumentOutOfRangeException(); |
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} |
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} |
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public static TypeReferenceHandle GetDeclaringType(this TypeReference tr) |
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{ |
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switch (tr.ResolutionScope.Kind) |
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{ |
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case HandleKind.TypeReference: |
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return (TypeReferenceHandle)tr.ResolutionScope; |
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default: |
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return default(TypeReferenceHandle); |
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} |
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} |
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public static FullTypeName GetFullTypeName(this EntityHandle handle, MetadataReader reader) |
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{ |
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if (handle.IsNil) |
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throw new ArgumentNullException(nameof(handle)); |
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switch (handle.Kind) |
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{ |
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case HandleKind.TypeDefinition: |
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return ((TypeDefinitionHandle)handle).GetFullTypeName(reader); |
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case HandleKind.TypeReference: |
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return ((TypeReferenceHandle)handle).GetFullTypeName(reader); |
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case HandleKind.TypeSpecification: |
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return ((TypeSpecificationHandle)handle).GetFullTypeName(reader); |
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default: |
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throw new ArgumentOutOfRangeException(); |
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} |
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} |
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public static bool IsKnownType(this EntityHandle handle, MetadataReader reader, |
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KnownTypeCode knownType) |
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{ |
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return !handle.IsNil |
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&& GetFullTypeName(handle, reader) == KnownTypeReference.Get(knownType).TypeName; |
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} |
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internal static bool IsKnownType(this EntityHandle handle, MetadataReader reader, |
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KnownAttribute knownType) |
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{ |
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return !handle.IsNil |
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&& GetFullTypeName(handle, reader) == knownType.GetTypeName(); |
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} |
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public static FullTypeName GetFullTypeName(this TypeSpecificationHandle handle, MetadataReader reader) |
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{ |
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if (handle.IsNil) |
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throw new ArgumentNullException(nameof(handle)); |
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var ts = reader.GetTypeSpecification(handle); |
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return ts.DecodeSignature(new Metadata.FullTypeNameSignatureDecoder(reader), default(Unit)); |
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} |
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public static FullTypeName GetFullTypeName(this TypeReferenceHandle handle, MetadataReader reader) |
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{ |
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if (handle.IsNil) |
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throw new ArgumentNullException(nameof(handle)); |
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var tr = reader.GetTypeReference(handle); |
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string name; |
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try |
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{ |
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name = reader.GetString(tr.Name); |
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} |
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catch (BadImageFormatException) |
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{ |
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name = $"TR{reader.GetToken(handle):x8}"; |
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} |
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name = ReflectionHelper.SplitTypeParameterCountFromReflectionName( |
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name, out var typeParameterCount); |
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TypeReferenceHandle declaringTypeHandle; |
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try |
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{ |
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declaringTypeHandle = tr.GetDeclaringType(); |
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} |
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catch (BadImageFormatException) |
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{ |
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declaringTypeHandle = default; |
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} |
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if (declaringTypeHandle.IsNil) |
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{ |
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string ns; |
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try |
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{ |
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ns = tr.Namespace.IsNil ? "" : reader.GetString(tr.Namespace); |
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} |
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catch (BadImageFormatException) |
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{ |
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ns = ""; |
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} |
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return new FullTypeName(new TopLevelTypeName(ns, name, typeParameterCount)); |
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} |
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else |
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{ |
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return declaringTypeHandle.GetFullTypeName(reader).NestedType(name, typeParameterCount); |
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} |
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} |
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public static FullTypeName GetFullTypeName(this TypeDefinitionHandle handle, MetadataReader reader) |
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{ |
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if (handle.IsNil) |
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throw new ArgumentNullException(nameof(handle)); |
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return reader.GetTypeDefinition(handle).GetFullTypeName(reader); |
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} |
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public static FullTypeName GetFullTypeName(this TypeDefinition td, MetadataReader reader) |
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{ |
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TypeDefinitionHandle declaringTypeHandle; |
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string name = ReflectionHelper.SplitTypeParameterCountFromReflectionName( |
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reader.GetString(td.Name), out var typeParameterCount); |
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if ((declaringTypeHandle = td.GetDeclaringType()).IsNil) |
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{ |
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string @namespace = td.Namespace.IsNil ? "" : reader.GetString(td.Namespace); |
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return new FullTypeName(new TopLevelTypeName(@namespace, name, typeParameterCount)); |
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} |
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else |
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{ |
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return declaringTypeHandle.GetFullTypeName(reader).NestedType(name, typeParameterCount); |
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} |
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} |
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public static FullTypeName GetFullTypeName(this ExportedType type, MetadataReader metadata) |
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{ |
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string name = ReflectionHelper.SplitTypeParameterCountFromReflectionName( |
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metadata.GetString(type.Name), out int typeParameterCount); |
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if (type.Implementation.Kind == HandleKind.ExportedType) |
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{ |
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var outerType = metadata.GetExportedType((ExportedTypeHandle)type.Implementation); |
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return outerType.GetFullTypeName(metadata).NestedType(name, typeParameterCount); |
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} |
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else |
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{ |
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string ns = type.Namespace.IsNil ? "" : metadata.GetString(type.Namespace); |
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return new TopLevelTypeName(ns, name, typeParameterCount); |
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} |
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} |
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public static bool IsAnonymousType(this TypeDefinition type, MetadataReader metadata) |
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{ |
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string name = metadata.GetString(type.Name); |
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if (type.Namespace.IsNil && type.HasGeneratedName(metadata) |
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&& (name.Contains("AnonType") || name.Contains("AnonymousType"))) |
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{ |
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return type.IsCompilerGenerated(metadata); |
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} |
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return false; |
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} |
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#region HasGeneratedName |
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public static bool IsGeneratedName(this StringHandle handle, MetadataReader metadata) |
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{ |
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return !handle.IsNil |
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&& (metadata.GetString(handle).StartsWith("<", StringComparison.Ordinal) |
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|| metadata.GetString(handle).Contains("$")); |
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} |
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public static bool HasGeneratedName(this MethodDefinitionHandle handle, MetadataReader metadata) |
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{ |
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return metadata.GetMethodDefinition(handle).Name.IsGeneratedName(metadata); |
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} |
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public static bool HasGeneratedName(this TypeDefinitionHandle handle, MetadataReader metadata) |
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{ |
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return metadata.GetTypeDefinition(handle).Name.IsGeneratedName(metadata); |
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} |
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public static bool HasGeneratedName(this TypeDefinition type, MetadataReader metadata) |
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{ |
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return type.Name.IsGeneratedName(metadata); |
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} |
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public static bool HasGeneratedName(this FieldDefinitionHandle handle, MetadataReader metadata) |
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{ |
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return metadata.GetFieldDefinition(handle).Name.IsGeneratedName(metadata); |
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} |
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#endregion |
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#region IsCompilerGenerated |
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public static bool IsCompilerGenerated(this MethodDefinitionHandle handle, MetadataReader metadata) |
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{ |
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return metadata.GetMethodDefinition(handle).IsCompilerGenerated(metadata); |
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} |
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public static bool IsCompilerGeneratedOrIsInCompilerGeneratedClass(this MethodDefinitionHandle handle, |
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MetadataReader metadata) |
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{ |
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MethodDefinition method = metadata.GetMethodDefinition(handle); |
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if (method.IsCompilerGenerated(metadata)) |
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return true; |
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TypeDefinitionHandle declaringTypeHandle = method.GetDeclaringType(); |
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if (!declaringTypeHandle.IsNil && declaringTypeHandle.IsCompilerGenerated(metadata)) |
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return true; |
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return false; |
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} |
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public static bool IsCompilerGeneratedOrIsInCompilerGeneratedClass(this TypeDefinitionHandle handle, |
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MetadataReader metadata) |
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{ |
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TypeDefinition type = metadata.GetTypeDefinition(handle); |
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if (type.IsCompilerGenerated(metadata)) |
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return true; |
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TypeDefinitionHandle declaringTypeHandle = type.GetDeclaringType(); |
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if (!declaringTypeHandle.IsNil && declaringTypeHandle.IsCompilerGenerated(metadata)) |
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return true; |
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return false; |
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} |
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public static bool IsCompilerGenerated(this MethodDefinition method, MetadataReader metadata) |
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{ |
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return method.GetCustomAttributes().HasKnownAttribute(metadata, KnownAttribute.CompilerGenerated); |
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} |
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public static bool IsCompilerGenerated(this FieldDefinitionHandle handle, MetadataReader metadata) |
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{ |
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return metadata.GetFieldDefinition(handle).IsCompilerGenerated(metadata); |
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} |
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public static bool IsCompilerGenerated(this FieldDefinition field, MetadataReader metadata) |
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{ |
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return field.GetCustomAttributes().HasKnownAttribute(metadata, KnownAttribute.CompilerGenerated); |
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} |
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public static bool IsCompilerGenerated(this TypeDefinitionHandle handle, MetadataReader metadata) |
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{ |
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return metadata.GetTypeDefinition(handle).IsCompilerGenerated(metadata); |
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} |
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public static bool IsCompilerGenerated(this TypeDefinition type, MetadataReader metadata) |
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{ |
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return type.GetCustomAttributes().HasKnownAttribute(metadata, KnownAttribute.CompilerGenerated); |
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} |
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#endregion |
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#region Attribute extensions |
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/// <summary> |
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/// Gets the type of the attribute. |
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/// </summary> |
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public static EntityHandle GetAttributeType(this SRM.CustomAttribute attribute, MetadataReader reader) |
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{ |
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switch (attribute.Constructor.Kind) |
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{ |
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case HandleKind.MethodDefinition: |
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var md = reader.GetMethodDefinition((MethodDefinitionHandle)attribute.Constructor); |
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return md.GetDeclaringType(); |
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case HandleKind.MemberReference: |
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var mr = reader.GetMemberReference((MemberReferenceHandle)attribute.Constructor); |
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return mr.Parent; |
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default: |
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throw new BadImageFormatException("Unexpected token kind for attribute constructor: " |
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+ attribute.Constructor.Kind); |
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} |
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} |
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public static bool HasKnownAttribute(this CustomAttributeHandleCollection customAttributes, |
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MetadataReader metadata, KnownAttribute type) |
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{ |
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foreach (var handle in customAttributes) |
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{ |
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var customAttribute = metadata.GetCustomAttribute(handle); |
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if (customAttribute.IsKnownAttribute(metadata, type)) |
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return true; |
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} |
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return false; |
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} |
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internal static bool IsKnownAttribute(this SRM.CustomAttribute attr, MetadataReader metadata, |
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KnownAttribute attrType) |
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{ |
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return attr.GetAttributeType(metadata).IsKnownType(metadata, attrType); |
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} |
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public static Nullability? GetNullableContext(this CustomAttributeHandleCollection customAttributes, |
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MetadataReader metadata) |
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{ |
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foreach (var handle in customAttributes) |
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{ |
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var customAttribute = metadata.GetCustomAttribute(handle); |
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if (customAttribute.IsKnownAttribute(metadata, KnownAttribute.NullableContext)) |
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{ |
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// Decode |
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CustomAttributeValue<IType> value; |
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try |
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{ |
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value = customAttribute.DecodeValue( |
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Metadata.MetadataExtensions.MinimalAttributeTypeProvider); |
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} |
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catch (BadImageFormatException) |
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{ |
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continue; |
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} |
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catch (Metadata.EnumUnderlyingTypeResolveException) |
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{ |
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continue; |
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} |
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if (value.FixedArguments.Length == 1 && value.FixedArguments[0].Value is byte b && b <= 2) |
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{ |
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return (Nullability)b; |
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} |
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} |
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} |
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return null; |
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} |
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#endregion |
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public static unsafe BlobReader GetInitialValue(this FieldDefinition field, PEReader pefile, |
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ICompilation typeSystem) |
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{ |
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if (!field.HasFlag(FieldAttributes.HasFieldRVA)) |
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return default; |
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int rva = field.GetRelativeVirtualAddress(); |
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if (rva == 0) |
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return default; |
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int size = field.DecodeSignature(new FieldValueSizeDecoder(typeSystem), default); |
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var sectionData = pefile.GetSectionData(rva); |
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if (sectionData.Length == 0 && size != 0) |
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throw new BadImageFormatException($"Field data (rva=0x{rva:x}) could not be found" |
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+ "in any section!"); |
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if (size < 0 || size > sectionData.Length) |
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throw new BadImageFormatException($"Invalid size {size} for field data!"); |
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return sectionData.GetReader(0, size); |
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} |
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|
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sealed class FieldValueSizeDecoder : ISignatureTypeProvider<int, GenericContext> |
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{ |
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readonly MetadataModule module; |
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readonly int pointerSize; |
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|
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public FieldValueSizeDecoder(ICompilation typeSystem = null) |
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{ |
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this.module = (MetadataModule)typeSystem?.MainModule; |
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if (module == null) |
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this.pointerSize = IntPtr.Size; |
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else |
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this.pointerSize = module.PEFile.Reader.PEHeaders.PEHeader.Magic == PEMagic.PE32 ? 4 : 8; |
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} |
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|
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public int GetArrayType(int elementType, ArrayShape shape) => |
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GetPrimitiveType(PrimitiveTypeCode.Object); |
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public int GetSZArrayType(int elementType) => GetPrimitiveType(PrimitiveTypeCode.Object); |
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public int GetByReferenceType(int elementType) => pointerSize; |
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public int GetFunctionPointerType(MethodSignature<int> signature) => pointerSize; |
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public int GetGenericInstantiation(int genericType, ImmutableArray<int> typeArguments) |
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=> genericType; |
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public int GetGenericMethodParameter(GenericContext genericContext, int index) => 0; |
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public int GetGenericTypeParameter(GenericContext genericContext, int index) => 0; |
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public int GetModifiedType(int modifier, int unmodifiedType, bool isRequired) => unmodifiedType; |
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public int GetPinnedType(int elementType) => elementType; |
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public int GetPointerType(int elementType) => pointerSize; |
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|
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public int GetPrimitiveType(PrimitiveTypeCode typeCode) |
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{ |
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switch (typeCode) |
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{ |
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case PrimitiveTypeCode.Boolean: |
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case PrimitiveTypeCode.Byte: |
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case PrimitiveTypeCode.SByte: |
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return 1; |
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case PrimitiveTypeCode.Char: |
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case PrimitiveTypeCode.Int16: |
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case PrimitiveTypeCode.UInt16: |
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return 2; |
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case PrimitiveTypeCode.Int32: |
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case PrimitiveTypeCode.UInt32: |
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case PrimitiveTypeCode.Single: |
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return 4; |
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case PrimitiveTypeCode.Int64: |
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case PrimitiveTypeCode.UInt64: |
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case PrimitiveTypeCode.Double: |
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return 8; |
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case PrimitiveTypeCode.IntPtr: |
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case PrimitiveTypeCode.UIntPtr: |
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return pointerSize; |
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default: |
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return 0; |
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} |
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} |
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|
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public int GetTypeFromDefinition(MetadataReader reader, TypeDefinitionHandle handle, |
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byte rawTypeKind) |
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{ |
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var td = reader.GetTypeDefinition(handle); |
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return td.GetLayout().Size; |
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} |
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|
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public int GetTypeFromReference(MetadataReader reader, TypeReferenceHandle handle, |
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byte rawTypeKind) |
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{ |
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var typeDef = module?.ResolveType(handle, new GenericContext()).GetDefinition(); |
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if (typeDef == null || typeDef.MetadataToken.IsNil) |
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return 0; |
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reader = typeDef.ParentModule.PEFile.Metadata; |
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var td = reader.GetTypeDefinition((TypeDefinitionHandle)typeDef.MetadataToken); |
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return td.GetLayout().Size; |
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} |
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|
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public int GetTypeFromSpecification(MetadataReader reader, GenericContext genericContext, |
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TypeSpecificationHandle handle, byte rawTypeKind) |
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{ |
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return reader.GetTypeSpecification(handle).DecodeSignature(this, genericContext); |
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} |
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} |
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|
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public static EntityHandle GetBaseTypeOrNil(this TypeDefinition definition) |
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{ |
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try |
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{ |
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return definition.BaseType; |
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} |
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catch (BadImageFormatException) |
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{ |
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return default; |
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} |
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} |
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|
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public static string ToILSyntax(this SignatureCallingConvention callConv) |
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{ |
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return callConv switch |
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{ |
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SignatureCallingConvention.Default => "default", |
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SignatureCallingConvention.CDecl => "unmanaged cdecl", |
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SignatureCallingConvention.StdCall => "unmanaged stdcall", |
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SignatureCallingConvention.ThisCall => "unmanaged thiscall", |
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SignatureCallingConvention.FastCall => "unmanaged fastcall", |
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SignatureCallingConvention.VarArgs => "vararg", |
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SignatureCallingConvention.Unmanaged => "unmanaged", |
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_ => callConv.ToString().ToLowerInvariant() |
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}; |
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} |
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} |
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}
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