Library Coq.extraction.ExtrOcamlBasic
Extraction to Ocaml : use of basic Ocaml types
Extract Inductive bool =>
bool [
true false ].
Extract Inductive option =>
option [
Some None ].
Extract Inductive unit =>
unit [ "()" ].
Extract Inductive list =>
list [ "[]" "( :: )" ].
Extract Inductive prod => "( * )" [ "" ].
NB: The "" above is a hack, but produce nicer code than "(,)"
Mapping sumbool to bool and sumor to option is not always nicer,
but it helps when realizing stuff like
lt_eq_lt_dec
Extract Inductive sumbool =>
bool [
true false ].
Extract Inductive sumor =>
option [
Some None ].
Restore laziness of andb, orb.
NB: without these Extract Constant, andb/orb would be inlined
by extraction in order to have laziness, producing inelegant
(if ... then ... else false) and (if ... then true else ...).
Extract Inlined Constant andb => "(&&)".
Extract Inlined Constant orb => "(||)".