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lib/validator/number.ex
defmodule Funx.Validator.Number do
@moduledoc """
Validates that a value is a number (integer or float).
## Optional Options
- `:message` - Custom error message callback `(value -> String.t())`
## Examples
iex> Funx.Validator.Number.validate(42)
%Funx.Monad.Either.Right{right: 42}
iex> Funx.Validator.Number.validate(3.14)
%Funx.Monad.Either.Right{right: 3.14}
iex> Funx.Validator.Number.validate("42")
%Funx.Monad.Either.Left{left: %Funx.Errors.ValidationError{errors: ["must be a number"]}}
"""
use Funx.Validator
alias Funx.Predicate
@impl Funx.Validator
def valid?(value, opts, _env) do
predicate = Predicate.Number.pred(opts)
predicate.(value)
end
@impl Funx.Validator
def default_message(_value, _opts) do
"must be a number"
end
end