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lustre src lustre@effect.erl
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src/lustre@effect.erl

-module(lustre@effect).
-compile([no_auto_import, nowarn_unused_vars]).
-export([from/1, none/0, batch/1, map/2]).
-export_type([effect/1]).
-opaque effect(EXE) :: {effect, list(fun((fun((EXE) -> nil)) -> nil))}.
-spec from(fun((fun((EXF) -> nil)) -> nil)) -> effect(EXF).
from(Effect) ->
{effect, [Effect]}.
-spec none() -> effect(any()).
none() ->
{effect, []}.
-spec batch(list(effect(EXJ))) -> effect(EXJ).
batch(Effects) ->
{effect,
(gleam@list:fold(
Effects,
[],
fun(B, _use1) ->
{effect, A} = _use1,
gleam@list:append(B, A)
end
))}.
-spec map(effect(EXN), fun((EXN) -> EXP)) -> effect(EXP).
map(Effect, F) ->
{effect, L} = Effect,
{effect,
gleam@list:map(
L,
fun(Effect@1) ->
fun(Dispatch) -> Effect@1(fun(A) -> Dispatch(F(A)) end) end
end
)}.