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gleam_stdlib

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A standard library for the Gleam programming language

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gleam_stdlib gen src gleam@pair.erl
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gen/src/gleam@pair.erl 

-module(gleam@pair).

-compile(no_auto_import).



-export([first/1, second/1, swap/1, map_first/2, map_second/2]).



-spec first({BK, any()}) -> BK.

first(Pair) ->

    {A, _@1} = Pair,

    A.



-spec second({any(), BN}) -> BN.

second(Pair) ->

    {_@1, A} = Pair,

    A.



-spec swap({BO, BP}) -> {BP, BO}.

swap(Pair) ->

    {A, B} = Pair,

    {B, A}.



-spec map_first({BQ, BR}, fun((BQ) -> BS)) -> {BS, BR}.

map_first(Pair, Fun) ->

    {A, B} = Pair,

    {Fun(A), B}.



-spec map_second({BT, BU}, fun((BU) -> BV)) -> {BT, BV}.

map_second(Pair, Fun) ->

    {A, B} = Pair,

    {A, Fun(B)}.