public static DynamicMethod CopyToDynamicMethod([NotNull] MethodDefinition method)
{
if (method == null)
{
throw new ArgumentNullException(nameof(method));
}
var dynamicMethod = new DynamicMethod(
method.Name,
GetRuntimeType(method.ReturnType),
method.Parameters.Select(param => GetRuntimeType(param.ParameterType)).ToArray(),
true);
dynamicMethod.InitLocals = method.Body.InitLocals;
var ilGenerator = dynamicMethod.GetILGenerator();
var copier = new ILCopier(ilGenerator);
copier.CopyFrom(method);
return(dynamicMethod);
}
public Delegate Compile([NotNull] Type delegateType)
{
var syntaxTree = CreateSyntaxTree();
var references = _referenceLocations
.Distinct()
.Where(File.Exists)
.Select(location => MetadataReference.CreateFromFile(location))
.ToList();
var compilation = CSharpCompilation.Create(ExpressionCompilerAssemblyName)
.WithReferences(references)
.WithOptions(_compilerOptions)
.AddSyntaxTrees(syntaxTree);
using (var memoryStream = new MemoryStream())
{
var emitResult = compilation.Emit(memoryStream);
if (!emitResult.Success)
{
throw new CompilationErrorException(emitResult, syntaxTree);
}
memoryStream.Position = 0;
var module = ModuleDefinition.ReadModule(memoryStream);
var method = module.Types
.SelectMany(item => item.Methods)
.Single(item => item.Name == MethodName);
var dynamicMethod = ILCopier.CopyToDynamicMethod(method);
return(dynamicMethod.CreateDelegate(delegateType));
}
}