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package record_builder
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type ('field, 'head, 'tail, 'all_fields, 'extra) fold_step =
('head, 'all_fields, 'extra) accum ->
('all_fields -> 'field) * ('tail, 'all_fields, 'extra) accumEach part of the fold has a type of this form.
type ('field, 'tail, 'all_fields, 'extra) handle_one_field =
('field,
('field, 'tail) Hlist.cons,
'tail,
'all_fields Hlist.nonempty,
'extra)
fold_stepA step of the fold over a single field has this type.
Each argument to Fields.make_creator should take that field as an argument and return something of this type (see field below).
type ('record, 'all_fields, 'extra) handle_all_fields =
('record,
'all_fields Hlist.nonempty,
Hlist.nil,
'all_fields Hlist.nonempty,
'extra)
fold_stepThe overall fold of multiple steps created by applying Fields.make_creator without an initial value should have a type of this form. You then supply it as an argument to build_for_record below.