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gleam_stdlib

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A standard library for the Gleam programming language

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

-module(gleam@pair).

-compile([no_auto_import, nowarn_unused_vars]).



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



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

first(Pair) ->

    {A, _} = Pair,

    A.



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

second(Pair) ->

    {_, A} = Pair,

    A.



-spec swap({EX, EY}) -> {EY, EX}.

swap(Pair) ->

    {A, B} = Pair,

    {B, A}.



-spec map_first({EZ, FA}, fun((EZ) -> FB)) -> {FB, FA}.

map_first(Pair, Fun) ->

    {A, B} = Pair,

    {Fun(A), B}.



-spec map_second({FC, FD}, fun((FD) -> FE)) -> {FC, FE}.

map_second(Pair, Fun) ->

    {A, B} = Pair,

    {A, Fun(B)}.



-spec new(FF, FG) -> {FF, FG}.

new(First, Second) ->

    {First, Second}.