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

first(Pair) ->

    {A, _} = Pair,

    A.



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

second(Pair) ->

    {_, A} = Pair,

    A.



-spec swap({FA, FB}) -> {FB, FA}.

swap(Pair) ->

    {A, B} = Pair,

    {B, A}.



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

map_first(Pair, Fun) ->

    {A, B} = Pair,

    {Fun(A), B}.



-spec map_second({FF, FG}, fun((FG) -> FH)) -> {FF, FH}.

map_second(Pair, Fun) ->

    {A, B} = Pair,

    {A, Fun(B)}.



-spec new(FI, FJ) -> {FI, FJ}.

new(First, Second) ->

    {First, Second}.