private static DynamicExpression MakeDynamic(CallSiteBinder binder, Type returnType, ReadOnlyCollection <Expression> args)
{
ContractUtils.RequiresNotNull(binder, "binder");
for (int i = 0; i < args.Count; i++)
{
Expression arg = args[i];
ValidateDynamicArgument(arg);
}
Type delegateType = DelegateHelpers.MakeCallSiteDelegate(args, returnType);
// Since we made a delegate with argument types that exactly match,
// we can skip delegate and argument validation
switch (args.Count)
{
case 1: return(DynamicExpression.Make(returnType, delegateType, binder, args[0]));
case 2: return(DynamicExpression.Make(returnType, delegateType, binder, args[0], args[1]));
case 3: return(DynamicExpression.Make(returnType, delegateType, binder, args[0], args[1], args[2]));
case 4: return(DynamicExpression.Make(returnType, delegateType, binder, args[0], args[1], args[2], args[3]));
default: return(DynamicExpression.Make(returnType, delegateType, binder, args));
}
}
public static Expression MakeDynamic(Type type, CallSiteBinder binder, IEnumerable <Expression> arguments, Type[] argumentTypes)
{
if (argumentTypes == null)
{
return(Expression.Dynamic(binder, type, arguments));
}
else
{
// NB: This is a trick to leverage MakeCallSiteDelegate; we should refactor it to take in an array of types.
var args = argumentTypes.Map(a => (Expression)Expression.Default(a)).ToReadOnly();
var delegateType = DelegateHelpers.MakeCallSiteDelegate(args, type);
return(Expression.MakeDynamic(delegateType, binder, arguments));
}
}