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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, nowarn_unused_function, nowarn_nomatch]).
-export([first/1, second/1, swap/1, map_first/2, map_second/2, new/2]).
-spec first({AAD, any()}) -> AAD.
first(Pair) ->
{A, _} = Pair,
A.
-spec second({any(), AAG}) -> AAG.
second(Pair) ->
{_, A} = Pair,
A.
-spec swap({AAH, AAI}) -> {AAI, AAH}.
swap(Pair) ->
{A, B} = Pair,
{B, A}.
-spec map_first({AAJ, AAK}, fun((AAJ) -> AAL)) -> {AAL, AAK}.
map_first(Pair, Fun) ->
{A, B} = Pair,
{Fun(A), B}.
-spec map_second({AAM, AAN}, fun((AAN) -> AAO)) -> {AAM, AAO}.
map_second(Pair, Fun) ->
{A, B} = Pair,
{A, Fun(B)}.
-spec new(AAP, AAQ) -> {AAP, AAQ}.
new(First, Second) ->
{First, Second}.