correct the generic type for FromIO

IBM · Mar 5, 2024 · 3b2abe6 · 3b2abe6
1 parent 9aa2ae0
commit 3b2abe6
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Showing 2 changed files with 8 additions and 2 deletions.
diff --git a/either/either.go b/either/either.go
@@ -33,7 +33,7 @@ func Of[E, A any](value A) Either[E, A] {
  return F.Pipe1(value, Right[E, A])
 }
 
-func FromIO[E, IO ~func() A, A any](f IO) Either[E, A] {
+func FromIO[E any, IO ~func() A, A any](f IO) Either[E, A] {
  return F.Pipe1(f(), Right[E, A])
 }
 

diff --git a/either/either_test.go b/either/either_test.go
@@ -71,7 +71,6 @@ func TestReduce(t *testing.T) {
  assert.Equal(t, "foo", F.Pipe1(Left[string, string]("bar"), Reduce[string](s.Concat, "foo")))
 
 }
-
 func TestAp(t *testing.T) {
  f := S.Size
 
@@ -120,3 +119,10 @@ func TestStringer(t *testing.T) {
  var s fmt.Stringer = e
  assert.Equal(t, exp, s.String())
 }
+
+func TestFromIO(t *testing.T) {
+ f := func() string { return "abc" }
+ e := FromIO[error](f)
+
+ assert.Equal(t, Right[error]("abc"), e)
+}