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lib/predicate/is_true.ex
defmodule Funx.Predicate.IsTrue do
@moduledoc """
Predicate that checks if a value is `true`.
This is a convenience predicate for checking boolean flags.
Uses strict equality (`== true`), not truthiness.
## Examples
use Funx.Predicate
# Check if a flag is true
pred do
check [:poison, :active], IsTrue
end
# Equivalent to
pred do
check [:poison, :active], fn active -> active == true end
end
"""
@behaviour Funx.Predicate.Dsl.Behaviour
@impl true
def pred(_opts \\ []) do
fn value -> value == true end
end
end