The BOOST_PP_LIST_FOLD_LEFT_2ND macro folds (or accumulates) the elements of a list left-to-right.
Usage
BOOST_PP_LIST_FOLD_LEFT_2ND(op, state, list)
Arguments
- op
-
A ternary operation of the form op(d, state, elem).
This macro is called for each element in list--each time returning a new state.
This operation is expanded by BOOST_PP_LIST_FOLD_LEFT with the next available BOOST_PP_WHILE iteration,
the current state, and the current element.
- state
-
The initial state of the fold.
- list
-
The list to be folded.
Remarks
For the
list, (
0, (
1, (
2,
BOOST_PP_NIL))), this macro expands to:
op(d, op(d, op(d, state, 0), 1), 2)
This macro is deprecated.
Use BOOST_PP_LIST_FOLD_LEFT_d instead.
See Also
Requirements
Sample Code