public Delegate Compile(string name, LambdaExpression expression)
{
if (expression == null)
{
throw new ArgumentNullException(nameof(expression));
}
if (name == null)
{
throw new ArgumentNullException(nameof(name));
}
using (Timer.Step("MethodBuilderCompiler.Compile"))
{
expression.AssertNoPrivateMethods();
var typeB = _module.DefineType(name, TypeAttributes.Public);
var v = new AddFieldsForConstantsVisitor(typeB);
expression = v.VisitAndConvert(expression, nameof(Compile));
var methodB = typeB.DefineMethod(
MethodName,
MethodAttributes.Public | MethodAttributes.Static,
expression.ReturnType,
expression.Parameters.Select(p => p.Type).ToArray());
expression.CompileToMethod(methodB);
var type = typeB.CreateType();
foreach (var f in v.Fields)
{
var fi = type.GetField(f.Value.Name);
fi.SetValue(null, f.Key.Value);
}
var method = type.GetMethod(MethodName);
var del = Delegate.CreateDelegate(expression.Type, method);
return(del);
}
}