11 Jun
2010
11 Jun
'10
5:57 a.m.
Eric Niebler wrote:
It should be fixed now. Give it a shot. Fixed indeed.
Just curious, what does your custom generator do?
Given a proto expression X, it builds a table_expr< typename proto::tag_of<X>::type, X> basically I add the tag of the expression in the expression wrapper type. Sounds silly but later, we need to know if a given expression is of tag A or B and doing so cut a lot of compile time compared to calling tag_of each time. It also allow us to overload table_expr behavior based on tag without relying on the internal type of proto expression, making it easy for developper to add such special behavior on some non-trivial expression node.