bool predicates

funcs/predicate/bool.go

@@ -0,0 +1,6 @@
+package predicate
+
+import constraints "github.com/mikhalytch/eggs/constraints/base"
+
+func IsTrue[T constraints.Bool](t T) bool  { return bool(t) }
+func IsFalse[T constraints.Bool](t T) bool { return !bool(t) }

funcs/predicate/bool_test.go

@@ -0,0 +1,27 @@
+package predicate_test
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+
+	"github.com/mikhalytch/eggs/funcs/predicate"
+)
+
+func TestIsTrue(t *testing.T) {
+	type bb bool
+
+	tr, fa := bb(true), bb(false)
+
+	require.True(t, predicate.IsTrue(tr))
+	require.False(t, predicate.IsTrue(fa))
+}
+
+func TestIsFalse(t *testing.T) {
+	type bb bool
+
+	tr, fa := bb(true), bb(false)
+
+	require.True(t, predicate.IsFalse(fa))
+	require.False(t, predicate.IsFalse(tr))
+}