bbradson
559 lines
22 KiB
C#
559 lines
22 KiB
C#
// Copyright (c) 2023 bradson
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// This Source Code Form is subject to the terms of the Mozilla Public
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// License, v. 2.0. If a copy of the MPL was not distributed with this
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// file, You can obtain one at https://mozilla.org/MPL/2.0/.
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using System.Runtime.CompilerServices;
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using Mono.Cecil;
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using Mono.Cecil.Cil;
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using Mono.Collections.Generic;
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using Verse;
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using CallSite = Mono.Cecil.CallSite;
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namespace FisheryLib.Cecil;
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public static class CecilExtensions
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{
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public static MethodReference ImportReference(this ModuleDefinition module, Delegate method)
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=> module.ImportReference(method.Method);
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public static MethodReference MakeGenericMethod<T>(this MethodReference genericMethodDefinition,
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ICollection<T> genericArguments) where T : TypeReference
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{
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if (genericArguments.Count != genericMethodDefinition.GenericParameters.Count)
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ThrowForInvalidGenericArgumentCount(genericMethodDefinition, genericArguments);
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var genericInstanceMethod = new GenericInstanceMethod(genericMethodDefinition);
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foreach (var genericArgument in genericArguments)
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genericInstanceMethod.GenericArguments.Add(genericArgument);
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return genericInstanceMethod;
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}
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private static void ThrowForInvalidGenericArgumentCount<T>(IGenericParameterProvider genericParameterProvider,
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ICollection<T> genericArguments) where T : TypeReference
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=> throw new ArgumentException(
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$"Invalid generic argument count for {genericParameterProvider}. Received {
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genericArguments.Count}, must be {genericParameterProvider.GenericParameters.Count}");
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public static MethodReference MakeGenericMethod<T>(this MethodReference genericMethodDefinition,
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params T[] genericArguments) where T : TypeReference
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=> MakeGenericMethod(genericMethodDefinition, (ICollection<T>)genericArguments);
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public static MethodReference ImportMethodWithGenericArguments<T>(this ModuleDefinition module, MethodInfo method,
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ICollection<T> genericArguments) where T : TypeReference
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=> module.ImportReference(method.IsGenericMethodDefinition ? method : method.GetGenericMethodDefinition())
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.MakeGenericMethod(genericArguments);
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public static MethodReference ImportMethodWithGenericArguments<T>(this ModuleDefinition module, MethodInfo method,
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params T[] genericArguments) where T : TypeReference
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=> module.ImportMethodWithGenericArguments(method, (ICollection<T>)genericArguments);
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public static MethodReference ImportMethodWithGenericArguments<T>(this ModuleDefinition module, Delegate method,
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ICollection<T> genericArguments) where T : TypeReference
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=> module.ImportMethodWithGenericArguments(method.Method, genericArguments);
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public static MethodReference ImportMethodWithGenericArguments<T>(this ModuleDefinition module, Delegate method,
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params T[] genericArguments) where T : TypeReference
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=> module.ImportMethodWithGenericArguments(method.Method, (ICollection<T>)genericArguments);
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public static TypeReference MakeGenericType<T>(this TypeReference genericTypeDefinition,
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ICollection<T> genericArguments) where T : TypeReference
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{
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if (genericArguments.Count != genericTypeDefinition.GenericParameters.Count)
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ThrowForInvalidGenericArgumentCount(genericTypeDefinition, genericArguments);
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var genericInstanceType = new GenericInstanceType(genericTypeDefinition);
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foreach (var genericArgument in genericArguments)
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genericInstanceType.GenericArguments.Add(genericArgument);
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return genericInstanceType;
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}
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public static TypeReference MakeGenericType<T>(this TypeReference genericTypeDefinition,
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params T[] genericArguments) where T : TypeReference
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=> MakeGenericType(genericTypeDefinition, (ICollection<T>)genericArguments);
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public static TypeReference ImportTypeWithGenericArguments<T>(this ModuleDefinition module, Type type,
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ICollection<T> genericArguments) where T : TypeReference
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=> module.ImportReference(type.IsGenericTypeDefinition ? type : type.GetElementType())
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.MakeGenericType(genericArguments);
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public static TypeReference ImportTypeWithGenericArguments<T>(this ModuleDefinition module, Type type,
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params T[] genericArguments) where T : TypeReference
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=> module.ImportTypeWithGenericArguments(type, (ICollection<T>)genericArguments);
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public static VariableDefinition DeclareLocal(this ILProcessor ilProcessor, Type localType)
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{
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var variableDefinition = new VariableDefinition(ilProcessor.GetModule().ImportReference(localType));
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ilProcessor.Body.Variables.Add(variableDefinition);
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return variableDefinition;
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}
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public static VariableDefinition DeclareLocal(this ILProcessor ilProcessor, TypeReference localType)
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{
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var variableDefinition = new VariableDefinition(localType);
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ilProcessor.Body.Variables.Add(variableDefinition);
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return variableDefinition;
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}
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public static void InsertAt(this ILProcessor ilProcessor, int index, Instruction instruction)
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=> ilProcessor.instructions.Insert(index, instruction);
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public static void InsertAt(this ILProcessor ilProcessor, int index, OpCode opCode)
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=> ilProcessor.InsertAt(index, Instruction.Create(opCode));
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public static void InsertAt(this ILProcessor ilProcessor, int index, OpCode opCode, TypeReference type)
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=> ilProcessor.InsertAt(index, Instruction.Create(opCode, type));
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public static void InsertAt(this ILProcessor ilProcessor, int index, OpCode opCode, Type type)
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=> ilProcessor.InsertAt(index, opCode, ilProcessor.GetModule().ImportReference(type));
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public static void InsertAt(this ILProcessor ilProcessor, int index, OpCode opCode, CallSite site)
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=> ilProcessor.InsertAt(index, Instruction.Create(opCode, site));
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public static void InsertAt(this ILProcessor ilProcessor, int index, OpCode opCode, MethodReference method)
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=> ilProcessor.InsertAt(index, Instruction.Create(opCode, method));
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public static void InsertAt(this ILProcessor ilProcessor, int index, OpCode opCode, MethodBase method,
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params Type[] genericArguments)
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=> ilProcessor.InsertAt(index, Instruction.Create(opCode,
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ImportReferenceWithOptionalGenericArguments(method, ilProcessor.GetModule(), genericArguments)));
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public static void InsertAt(this ILProcessor ilProcessor, int index, OpCode opCode, Delegate method,
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params Type[] genericArguments)
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=> ilProcessor.InsertAt(index, opCode, method.Method, genericArguments);
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private static MethodReference ImportReferenceWithOptionalGenericArguments(MethodBase method,
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ModuleDefinition module, params Type[] genericArguments)
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=> genericArguments.Length > 0
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? module.ImportMethodWithGenericArguments((MethodInfo)method, genericArguments)
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: module.ImportReference(method);
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public static void InsertAt(this ILProcessor ilProcessor, int index, OpCode opCode, FieldReference field)
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=> ilProcessor.InsertAt(index, Instruction.Create(opCode, field));
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public static void InsertAt(this ILProcessor ilProcessor, int index, OpCode opCode, FieldInfo field)
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=> ilProcessor.InsertAt(index, opCode, ilProcessor.GetModule().ImportReference(field));
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public static void InsertAt(this ILProcessor ilProcessor, int index, OpCode opCode, string value)
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=> ilProcessor.InsertAt(index, Instruction.Create(opCode, value));
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public static void InsertAt(this ILProcessor ilProcessor, int index, OpCode opCode, sbyte value)
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=> ilProcessor.InsertAt(index, Instruction.Create(opCode, value));
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public static void InsertAt(this ILProcessor ilProcessor, int index, OpCode opCode, byte value)
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=> ilProcessor.InsertAt(index, Instruction.Create(opCode, value));
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public static void InsertAt(this ILProcessor ilProcessor, int index, OpCode opCode, int value)
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=> ilProcessor.InsertAt(index, Instruction.Create(opCode, value));
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public static void InsertAt(this ILProcessor ilProcessor, int index, OpCode opCode, long value)
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=> ilProcessor.InsertAt(index, Instruction.Create(opCode, value));
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public static void InsertAt(this ILProcessor ilProcessor, int index, OpCode opCode, nint value)
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=> ilProcessor.InsertAt(index, Instruction.Create(opCode, value));
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public static void InsertAt(this ILProcessor ilProcessor, int index, OpCode opCode, float value)
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=> ilProcessor.InsertAt(index, Instruction.Create(opCode, value));
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public static void InsertAt(this ILProcessor ilProcessor, int index, OpCode opCode, double value)
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=> ilProcessor.InsertAt(index, Instruction.Create(opCode, value));
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public static void InsertAt(this ILProcessor ilProcessor, int index, OpCode opCode, Instruction target)
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=> ilProcessor.InsertAt(index, Instruction.Create(opCode, target));
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public static void InsertAt(this ILProcessor ilProcessor, int index, OpCode opCode, Instruction[] targets)
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=> ilProcessor.InsertAt(index, Instruction.Create(opCode, targets));
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public static void InsertAt(this ILProcessor ilProcessor, int index, OpCode opCode, VariableDefinition variable)
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=> ilProcessor.InsertAt(index, Instruction.Create(opCode, variable));
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public static void InsertAt(this ILProcessor ilProcessor, int index, OpCode opCode, ParameterDefinition parameter)
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=> ilProcessor.InsertAt(index, Instruction.Create(opCode, parameter));
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public static void InsertAt(this ILProcessor ilProcessor, int index, OpCode opCode, object operand)
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=> ilProcessor.InsertAt(index, CreateInstruction(opCode, operand));
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public static void InsertAt(this ILProcessor ilProcessor, int index, object instruction)
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{
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var module = ilProcessor.GetModule();
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ilProcessor.InsertAt(index, instruction switch
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{
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Instruction codeInstruction => codeInstruction,
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OpCode opCode => Instruction.Create(opCode),
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ITuple tuple => CreateInstruction(tuple is [OpCode opCode, _, ..]
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? opCode
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: ThrowArgumentExceptionForInvalidType<OpCode>(instruction),
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tuple[1] switch
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{
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MethodBase => ImportMethodFromTuple(tuple, module),
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FieldInfo fieldInfo => module.ImportReference(fieldInfo),
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Type => ImportTypeFromTuple(tuple, module),
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ParameterInfo parameterInfo => GetParameterDefinition(ilProcessor, parameterInfo),
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Delegate @delegate => module.ImportReference(@delegate.Method),
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_ => tuple[1]
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}),
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_ => ThrowArgumentExceptionForInvalidType<Instruction>(instruction)
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});
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}
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private static ParameterDefinition GetParameterDefinition(ILProcessor ilProcessor, ParameterInfo parameterInfo)
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{
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var parameters = ilProcessor.Body.Method.Parameters;
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foreach (var parameter in parameters)
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{
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if (parameter.Name == parameterInfo.Name)
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return parameter;
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}
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return ThrowHelper.ThrowArgumentException<ParameterDefinition>($"Could not find parameter named {
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parameterInfo.Name} in method {ilProcessor.Body.Method.FullName}");
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}
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private static MethodReference ImportMethodFromTuple(ITuple tuple, ModuleDefinition module)
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{
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var tupleLength = tuple.Length;
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Guard.IsGreaterThanOrEqualTo(tupleLength, 2);
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if (tupleLength == 2)
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return module.ImportReference((MethodBase)tuple[1]);
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var methodInfo = (MethodInfo)tuple[1];
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switch (tuple[2])
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{
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case Type[] typeArray:
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{
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return module.ImportMethodWithGenericArguments(methodInfo, typeArray);
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}
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case Type:
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{
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var genericArguments = new Type[tupleLength - 2];
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for (var i = 2; i < tupleLength; i++)
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genericArguments[i - 2] = (Type)tuple[i];
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return module.ImportMethodWithGenericArguments(methodInfo, genericArguments);
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}
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case Collection<GenericParameter> genericParameterCollection:
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{
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return module.ImportMethodWithGenericArguments(methodInfo, genericParameterCollection);
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}
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case Collection<TypeReference> typeReferenceCollection:
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{
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return module.ImportMethodWithGenericArguments(methodInfo, typeReferenceCollection);
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}
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case TypeReference:
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{
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var genericArguments = new TypeReference[tupleLength - 2];
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for (var i = 2; i < tupleLength; i++)
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genericArguments[i - 2] = (TypeReference)tuple[i];
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return module.ImportMethodWithGenericArguments(methodInfo, genericArguments);
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}
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default:
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{
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return ThrowHelper.ThrowArgumentException<MethodReference>(
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$"Tuple contains invalid type: {tuple[2].GetType().FullName}");
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}
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}
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}
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private static TypeReference ImportTypeFromTuple(ITuple tuple, ModuleDefinition module)
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{
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var tupleLength = tuple.Length;
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Guard.IsGreaterThanOrEqualTo(tupleLength, 2);
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if (tupleLength == 2)
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return module.ImportReference((Type)tuple[1]);
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var type = (Type)tuple[1];
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switch (tuple[2])
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{
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case Type[] typeArray:
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{
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return module.ImportTypeWithGenericArguments(type, typeArray);
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}
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case Type:
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{
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var genericArguments = new Type[tupleLength - 2];
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for (var i = 2; i < tupleLength; i++)
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genericArguments[i - 2] = (Type)tuple[i];
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return module.ImportTypeWithGenericArguments(type, genericArguments);
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}
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case Collection<GenericParameter> genericParameterCollection:
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{
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return module.ImportTypeWithGenericArguments(type, genericParameterCollection);
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}
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case Collection<TypeReference> typeReferenceCollection:
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{
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return module.ImportTypeWithGenericArguments(type, typeReferenceCollection);
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}
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case TypeReference:
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{
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var genericArguments = new TypeReference[tupleLength - 2];
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for (var i = 2; i < tupleLength; i++)
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genericArguments[i - 2] = (TypeReference)tuple[i];
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return module.ImportTypeWithGenericArguments(type, genericArguments);
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}
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default:
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{
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return ThrowHelper.ThrowArgumentException<TypeReference>(
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$"Tuple contains invalid type: {tuple[2].GetType().FullName}");
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}
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}
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}
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public static void InsertRange(this ILProcessor ilProcessor, int index, IEnumerable<Instruction> instructions)
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{
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foreach (var instruction in instructions)
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ilProcessor.InsertAt(index++, instruction);
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}
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public static void InsertRange(this ILProcessor ilProcessor, int index, params Instruction[] instructions)
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{
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for (var i = 0; i < instructions.Length; i++)
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ilProcessor.InsertAt(index++, instructions[i]);
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}
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public static void InsertRange(this ILProcessor ilProcessor, int index, IEnumerable<object> instructions)
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{
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foreach (var instruction in instructions)
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ilProcessor.InsertAt(index++, instruction);
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}
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public static void InsertRange(this ILProcessor ilProcessor, int index, params object[] instructions)
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{
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for (var i = 0; i < instructions.Length; i++)
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ilProcessor.InsertAt(index++, instructions[i]);
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}
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public static void ReplaceBodyWith(this ILProcessor ilProcessor, Delegate replacement)
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=> ilProcessor.ReplaceBodyWith(replacement.Method);
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public static void ReplaceBodyWith(this ILProcessor ilProcessor, MethodInfo replacement)
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{
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var oldBody = ilProcessor.Body;
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var module = oldBody.Method.Module;
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if (replacement.IsGenericMethod)
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replacement = replacement.GetGenericMethodDefinition();
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if (replacement.DeclaringType!.IsGenericType)
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{
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replacement = AccessTools.DeclaredMethod(replacement.DeclaringType.GetGenericTypeDefinition(),
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replacement.Name, replacement.GetParameters().GetTypes());
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}
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var newMethodReference = module.ImportReference(replacement);
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var newBody = newMethodReference.Resolve().Body;
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oldBody.Instructions.Clear();
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foreach (var instruction in newBody.instructions)
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{
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oldBody.Instructions.Add(new(instruction.OpCode, instruction.Operand switch
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{
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FieldReference field => module.ImportReference(field, newMethodReference),
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MethodReference method => module.ImportReference(method, newMethodReference),
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TypeReference type => module.ImportReference(type, newMethodReference),
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_ => instruction.Operand
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}));
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}
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oldBody.Variables.Clear();
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foreach (var variable in newBody.Variables)
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oldBody.Variables.Add(new(module.ImportReference(variable.VariableType, newMethodReference)));
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oldBody.MaxStackSize = newBody.MaxStackSize;
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oldBody.ExceptionHandlers.Clear();
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foreach (var exceptionHandler in newBody.ExceptionHandlers)
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{
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var handler = new ExceptionHandler(exceptionHandler.HandlerType)
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{
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TryStart = exceptionHandler.TryStart,
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TryEnd = exceptionHandler.TryEnd,
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FilterStart = exceptionHandler.FilterStart,
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HandlerStart = exceptionHandler.HandlerStart,
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HandlerEnd = exceptionHandler.HandlerEnd
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};
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if (exceptionHandler.CatchType is { } catchType)
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handler.CatchType = module.ImportReference(catchType, newMethodReference);
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oldBody.ExceptionHandlers.Add(handler);
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}
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oldBody.Method.ImplAttributes = newBody.Method.ImplAttributes;
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}
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public static MethodDefinition GetMethod(this ILProcessor ilProcessor) => ilProcessor.Body.Method;
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public static MethodDefinition? GetMethod(this TypeDefinition type, string name, Type?[]? parameters = null)
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{
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var methods = type.Methods;
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MethodDefinition? foundMethod = null;
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for (var i = 0; i < methods.Count; i++)
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{
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var method = methods[i];
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if (method.Name != name
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|| !TestForMatchingTypes(parameters, method.Parameters, static p => p.ParameterType.Name))
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{
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continue;
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}
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if (foundMethod != null)
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ThrowForAmbiguousMatch(type, name, parameters);
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else
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foundMethod = method;
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}
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return foundMethod;
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}
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public static TypeDefinition? GetTypeDefinition(this ModuleDefinition module, Type type)
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=> type.DeclaringType is { } declaringType
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? module.GetTypeDefinition(declaringType)?.NestedTypes.GetNamed(type.Name)
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: module.GetType(type.Namespace, type.Name);
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private static void ThrowForAmbiguousMatch(TypeDefinition type, string name, Type?[]? parameters)
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=> throw new AmbiguousMatchException($"Ambiguous match found for type: {type.FullName}, name: {
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name}, parameters: {parameters.ToStringSafeEnumerable()}");
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private static bool TestForMatchingTypes<T>(Type?[]? types, Collection<T>? testedTypes,
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Func<T, string> typeNameGetter)
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{
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if (types is null)
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return true;
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if (testedTypes is null || testedTypes.Count != types.Length)
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return false;
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var typesNotMatching = false;
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for (var i = 0; i < types.Length; i++)
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{
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var type = types[i];
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if (type is null || type.IsGenericParameter)
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continue;
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if (typeNameGetter(testedTypes[i]) != type.Name)
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typesNotMatching = true;
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}
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return !typesNotMatching;
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}
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public static ModuleDefinition GetModule(this ILProcessor ilProcessor) => ilProcessor.GetMethod().Module;
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public static Collection<TypeReference>? TryGetGenericArguments(this MethodReference method)
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=> method is GenericInstanceMethod instanceMethod
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? instanceMethod.GenericArguments
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: method.DeclaringType.TryGetGenericArguments();
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public static Collection<TypeReference>? TryGetGenericArguments(this TypeReference type)
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{
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while (type != null)
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{
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if (type is GenericInstanceType instanceType)
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return instanceType.GenericArguments;
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type = type.DeclaringType;
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}
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return null;
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}
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public static Collection<TypeReference>? TryGetGenericArguments(this TypeReference type,
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IGenericParameterProvider provider)
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{
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while (type != null)
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{
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if (type is GenericInstanceType instanceType)
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return instanceType.GenericArguments.ConvertAll(g => g.TryGetGenericParameterType(provider) ?? g);
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type = type.DeclaringType;
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}
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return null;
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}
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public static Collection<TypeReference>? TryGetGenericArguments(this IGenericParameterProvider provider)
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=> provider switch
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{
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null => ThrowHelper.ThrowArgumentNullException<Collection<TypeReference>>(nameof(provider)),
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MethodReference method => method.TryGetGenericArguments(),
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TypeReference type => type.TryGetGenericArguments(),
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_ => ThrowHelper.ThrowArgumentException<Collection<TypeReference>>(
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$"Generic parameter provider has unsupported type: {provider.GetType()}")
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};
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public static TypeReference? TryGetGenericParameterType(this TypeReference typeReference,
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IGenericParameterProvider provider)
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=> typeReference is GenericParameter genericParameter
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? TryGetUnderlyingType(genericParameter, provider)
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: null;
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public static TypeReference? TryGetUnderlyingType(GenericParameter genericParameter,
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IGenericParameterProvider provider)
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|
=> (genericParameter.Owner is TypeReference ownerType && provider is MemberReference providerMember
|
|
? providerMember.TryGetParentOfName(ownerType.Name)
|
|
: provider)?.TryGetGenericArguments()?[genericParameter.Position];
|
|
|
|
|
|
public static Collection<TOutput> ConvertAll<TInput, TOutput>(this Collection<TInput> collection,
|
|
Converter<TInput, TOutput> converter)
|
|
{
|
|
var result = new Collection<TOutput>(collection.Count);
|
|
|
|
for (var i = 0; i < collection.Count; i++)
|
|
result.Add(converter(collection[i])); // somehow throws OutOfRangeExceptions when using set_Item here
|
|
// Storing collection.Count in a var makes no difference
|
|
|
|
return result;
|
|
}
|
|
|
|
private static TypeReference? TryGetParentOfName(this MemberReference providerMember, string name)
|
|
{
|
|
var type = providerMember as TypeReference ?? providerMember.DeclaringType;
|
|
while (type != null)
|
|
{
|
|
if (type.Name == name)
|
|
return type;
|
|
|
|
type = type.DeclaringType;
|
|
}
|
|
|
|
return null;
|
|
}
|
|
|
|
private static T ThrowArgumentExceptionForInvalidType<T>(object instruction)
|
|
=> ThrowHelper.ThrowArgumentException<T>(nameof(instruction),
|
|
// ReSharper disable once ConditionalAccessQualifierIsNonNullableAccordingToAPIContract
|
|
$"Argument is of invalid type: {instruction?.GetType().FullName ?? "NULL"}");
|
|
|
|
private static Instruction CreateInstruction(OpCode opCode, object operand)
|
|
=> operand switch
|
|
{
|
|
TypeReference type => Instruction.Create(opCode, type),
|
|
CallSite site => Instruction.Create(opCode, site),
|
|
MethodReference method => Instruction.Create(opCode, method),
|
|
FieldReference field => Instruction.Create(opCode, field),
|
|
string value => Instruction.Create(opCode, value),
|
|
sbyte value => Instruction.Create(opCode, value),
|
|
byte value => Instruction.Create(opCode, value),
|
|
int value => Instruction.Create(opCode, value),
|
|
long value => Instruction.Create(opCode, value),
|
|
float value => Instruction.Create(opCode, value),
|
|
double value => Instruction.Create(opCode, value),
|
|
nint value => Instruction.Create(opCode, value),
|
|
Instruction target => Instruction.Create(opCode, target),
|
|
Instruction[] targets => Instruction.Create(opCode, targets),
|
|
VariableDefinition variable => Instruction.Create(opCode, variable),
|
|
ParameterDefinition parameter => Instruction.Create(opCode, parameter),
|
|
_ => ThrowHelper.ThrowArgumentException<Instruction>(nameof(operand),
|
|
// ReSharper disable once ConditionalAccessQualifierIsNonNullableAccordingToAPIContract
|
|
$"Operand for OpCode {opCode} is of invalid type: {operand?.GetType().FullName ?? "NULL"}")
|
|
};
|
|
} |