} // ctor
public override DynamicMetaObject FallbackSetMember(DynamicMetaObject target, DynamicMetaObject value, DynamicMetaObject errorSuggestion)
{
// defer the target
if (!target.HasValue)
{
return(Defer(target));
}
if (target.Value == null)
{
return(errorSuggestion ??
new DynamicMetaObject(
ThrowExpression(String.Format(Resources.rsMemberNotResolved, target.LimitType.Name, Name), ReturnType),
target.Restrictions.Merge(BindingRestrictions.GetInstanceRestriction(target.Expression, null))
));
}
else
{
Expression expr;
// restrictions
var restrictions = target.Restrictions.Merge(BindingRestrictions.GetTypeRestriction(target.Expression, target.LimitType));
// try to bind the member
switch (LuaEmit.TrySetMember(target.Expression, target.LimitType, Name, IgnoreCase,
(setType) => LuaEmit.ConvertWithRuntime(Lua, value.Expression, value.LimitType, setType),
out expr))
{
case LuaTrySetMemberReturn.None:
return(errorSuggestion ?? new DynamicMetaObject(ThrowExpression(LuaEmitException.GetMessageText(LuaEmitException.MemberNotFound, target.LimitType.Name, Name), ReturnType), restrictions));
case LuaTrySetMemberReturn.NotWritable:
return(errorSuggestion ?? new DynamicMetaObject(ThrowExpression(LuaEmitException.GetMessageText(LuaEmitException.CanNotWriteMember, target.LimitType.Name, Name), ReturnType), restrictions));
case LuaTrySetMemberReturn.ValidExpression:
return(new DynamicMetaObject(Lua.EnsureType(expr, ReturnType), restrictions.Merge(Lua.GetSimpleRestriction(value))));
default:
throw new ArgumentException("return of TryGetMember.");
}
}
} // func FallbackSetMember