Gets an integer value as an Int.

import Parser exposing (parse)


parse "123" int --> Ok 123


parse "-123" int --> Ok -123


parse "abc" int
    |> Result.mapError .message
--> Err "expected a digit [0-9], but got 'a' instead"

Gets a decimal value as a Float.

import Parser exposing (parse)


parse "12" number --> Ok 12.0


parse "12." number --> Ok 12.0


parse "12.34" number --> Ok 12.34


parse ".12" number --> Ok 0.12


parse "-12.34" number --> Ok -12.34


parse "-.12" number --> Ok -0.12


parse "." number
    |> Result.mapError .message
--> Err "expected a digit [0-9], but got '.' instead"


parse "abc" number
    |> Result.mapError .message
--> Err "expected a digit [0-9], but got 'a' instead"