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Fixed ArgsAsList transform to work with cons

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The `reverse_fold` requires a bidirectional sequence while `cons` is a forward sequence
This commit is contained in:
Nikita Kniazev
2019-04-02 00:45:13 +03:00
parent 95fcb88bb1
commit bbb67405da
1 changed files with 5 additions and 7 deletions
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12
test/examples.cpp
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@@ -178,20 +178,18 @@ struct CalcArity
struct ArgsAsList
: proto::when<
proto::function<proto::terminal<_>, proto::vararg<proto::terminal<_> > >
/*<< Use a `reverse_fold<>` transform to iterate over the children
of this node in reverse order, building a fusion list from back to
front. >>*/
, proto::reverse_fold<
/*<< Use a `fold<>` transform to iterate over the children of this
node in forward order, building a fusion list from front to back. >>*/
, proto::fold<
/*<< The first child expression of a `function<>` node is the
function being invoked. We don't want that in our list, so use
`pop_front()` to remove it. >>*/
proto::_pop_front(_)
/*<< `nil` is the initial state used by the `reverse_fold<>`
transform. >>*/
/*<< `nil` is the initial state used by the `fold<>` transform. >>*/
, fusion::nil()
/*<< Put the rest of the function arguments in a fusion cons
list. >>*/
, fusion::cons<proto::_value, proto::_state>(proto::_value, proto::_state)
, proto::functional::push_back(proto::_state, proto::_value)
>
>
{};