-module(gleam@function).
-compile(no_auto_import).

-export([compose/2, curry2/1, curry3/1, curry4/1, curry5/1, curry6/1, flip/1, identity/1, constant/1]).

-spec compose(fun((DVY) -> DVZ), fun((DVZ) -> DWA)) -> fun((DVY) -> DWA).
compose(Fun1, Fun2) ->
    fun(A) -> Fun2(Fun1(A)) end.

-spec curry2(fun((DWB, DWC) -> DWD)) -> fun((DWB) -> fun((DWC) -> DWD)).
curry2(Fun) ->
    fun(A) -> fun(B) -> Fun(A, B) end end.

-spec curry3(fun((DWF, DWG, DWH) -> DWI)) -> fun((DWF) -> fun((DWG) -> fun((DWH) -> DWI))).
curry3(Fun) ->
    fun(A) -> fun(B) -> fun(C) -> Fun(A, B, C) end end end.

-spec curry4(fun((DWK, DWL, DWM, DWN) -> DWO)) -> fun((DWK) -> fun((DWL) -> fun((DWM) -> fun((DWN) -> DWO)))).
curry4(Fun) ->
    fun(A) -> fun(B) -> fun(C) -> fun(D) -> Fun(A, B, C, D) end end end end.

-spec curry5(fun((DWQ, DWR, DWS, DWT, DWU) -> DWV)) -> fun((DWQ) -> fun((DWR) -> fun((DWS) -> fun((DWT) -> fun((DWU) -> DWV))))).
curry5(Fun) ->
    fun(A) ->
        fun(B) ->
            fun(C) -> fun(D) -> fun(E) -> Fun(A, B, C, D, E) end end end
        end
    end.

-spec curry6(fun((DWX, DWY, DWZ, DXA, DXB, DXC) -> DXD)) -> fun((DWX) -> fun((DWY) -> fun((DWZ) -> fun((DXA) -> fun((DXB) -> fun((DXC) -> DXD)))))).
curry6(Fun) ->
    fun(A) ->
        fun(B) ->
            fun(C) ->
                fun(D) -> fun(E) -> fun(F) -> Fun(A, B, C, D, E, F) end end end
            end
        end
    end.

-spec flip(fun((DXF, DXG) -> DXH)) -> fun((DXG, DXF) -> DXH).
flip(Fun) ->
    fun(B, A) -> Fun(A, B) end.

-spec identity(DXI) -> DXI.
identity(X) ->
    X.

-spec constant(DXJ) -> fun((any()) -> DXJ).
constant(Value) ->
    fun(_) -> Value end.