schemahcl: allow set for_each on tuple any (#2466)

doc/md/atlas-schema/hcl.mdx

@@ -805,7 +805,7 @@ or a `set` of references.
 
 ```hcl title="schema.pg.hcl" {2-3}
 trigger "audit_log_trigger" {
-  for_each = toset([table.users, table.orders, table.payments])
+  for_each = [table.users, table.orders, table.payments]
   on       = each.value
   after {
     insert = true

schemahcl/schemahcl.go

@@ -942,7 +942,7 @@ func forEachBlocks(ctx *hcl.EvalContext, b *hclsyntax.Block) ([]*hclsyntax.Block
 	if diags.HasErrors() {
 		return nil, diags
 	}
-	if t := forEach.Type(); !t.IsSetType() && !t.IsObjectType() {
+	if t := forEach.Type(); !t.IsSetType() && !t.IsObjectType() && !t.IsTupleType() {
 		return nil, fmt.Errorf("schemahcl: for_each does not support %s type", t.FriendlyName())
 	}
 	delete(b.Body.Attributes, forEachAttr)

schemahcl/schemahcl_test.go

@@ -501,6 +501,37 @@ table "t1" {
 table "t2" {
   schema = schema.s2
 }
+`, string(buf))
+
+	// Tuple of type any.
+	b1 = []byte(`
+schema "s1" {
+  comment = "schema comment"
+}
+schema "s2" {
+  # object without comment.
+}
+
+table {
+  for_each = [schema.s1, schema.s2]
+  name = each.value.name
+  schema = each.value
+}
+`)
+	err = New().EvalBytes(b1, &doc1, nil)
+	require.NoError(t, err)
+	buf, err = Marshal.MarshalSpec(&doc1)
+	require.NoError(t, err)
+	require.Equal(t, `schema "s1" {
+}
+schema "s2" {
+}
+table "s1" {
+  schema = schema.s1
+}
+table "s2" {
+  schema = schema.s2
+}
 `, string(buf))
 }