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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, nowarn_unused_function, nowarn_nomatch]).



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



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

first(Pair) ->

    {A, _} = Pair,

    A.



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

second(Pair) ->

    {_, A} = Pair,

    A.



-spec swap({FQ, FR}) -> {FR, FQ}.

swap(Pair) ->

    {A, B} = Pair,

    {B, A}.



-spec map_first({FS, FT}, fun((FS) -> FU)) -> {FU, FT}.

map_first(Pair, Fun) ->

    {A, B} = Pair,

    {Fun(A), B}.



-spec map_second({FV, FW}, fun((FW) -> FX)) -> {FV, FX}.

map_second(Pair, Fun) ->

    {A, B} = Pair,

    {A, Fun(B)}.



-spec new(FY, FZ) -> {FY, FZ}.

new(First, Second) ->

    {First, Second}.