Gets an integer value as an Int.

import Parser exposing (parse)
import Parser.Error


-- You can parse integers as `Int` instead of `String`.
parse "123" int --> Ok 123


-- It also works with negative numbers.
parse "-123" int --> Ok -123


-- But not with invalid numbers.
parse "abc" int
    |> Result.mapError Parser.Error.message
--> Err "1:1: I was expecting a digit [0-9]. I got stuck when I got the character 'a'."

Gets a decimal value as a Float.

import Parser exposing (parse)
import Parser.Error


-- You can parse numbers as `Float` instead of `String`.
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


-- It also works with negative numbers.
parse "-12.34" number --> Ok -12.34
parse "-.12" number --> Ok -0.12


-- But not with invalid numbers.
parse "." number
    |> Result.mapError Parser.Error.message
--> Err "1:1: I was expecting a digit [0-9]. I got stuck when I got the character '.'."


parse "abc" number
    |> Result.mapError Parser.Error.message
--> Err "1:1: I was expecting a digit [0-9]. I got stuck when I got the character 'a'."