-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, tap/2]).

-spec compose(fun((CKV) -> CKW), fun((CKW) -> CKX)) -> fun((CKV) -> CKX).
compose(Fun1, Fun2) ->
    fun(A) -> Fun2(Fun1(A)) end.

-spec curry2(fun((CKY, CKZ) -> CLA)) -> fun((CKY) -> fun((CKZ) -> CLA)).
curry2(Fun) ->
    fun(A) -> fun(B) -> Fun(A, B) end end.

-spec curry3(fun((CLC, CLD, CLE) -> CLF)) -> fun((CLC) -> fun((CLD) -> fun((CLE) -> CLF))).
curry3(Fun) ->
    fun(A) -> fun(B) -> fun(C) -> Fun(A, B, C) end end end.

-spec curry4(fun((CLH, CLI, CLJ, CLK) -> CLL)) -> fun((CLH) -> fun((CLI) -> fun((CLJ) -> fun((CLK) -> CLL)))).
curry4(Fun) ->
    fun(A) -> fun(B) -> fun(C) -> fun(D) -> Fun(A, B, C, D) end end end end.

-spec curry5(fun((CLN, CLO, CLP, CLQ, CLR) -> CLS)) -> fun((CLN) -> fun((CLO) -> fun((CLP) -> fun((CLQ) -> fun((CLR) -> CLS))))).
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((CLU, CLV, CLW, CLX, CLY, CLZ) -> CMA)) -> fun((CLU) -> fun((CLV) -> fun((CLW) -> fun((CLX) -> fun((CLY) -> fun((CLZ) -> CMA)))))).
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((CMC, CMD) -> CME)) -> fun((CMD, CMC) -> CME).
flip(Fun) ->
    fun(B, A) -> Fun(A, B) end.

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

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

-spec tap(CMI, fun((CMI) -> any())) -> CMI.
tap(Arg, Effect) ->
    Effect(Arg),
    Arg.