1 files changed, 37 insertions, 0 deletions
diff --git a/test/typeparam/issue48185b.dir/a.go b/test/typeparam/issue48185b.dir/a.go
new file mode 100644
index 0000000..9aed60c
--- /dev/null
+++ b/test/typeparam/issue48185b.dir/a.go
@@ -0,0 +1,37 @@
+// Copyright 2021 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package a
+
+import (
+	"reflect"
+	"sync"
+)
+
+type addressableValue struct{ reflect.Value }
+
+type arshalers[Options, Coder any] struct {
+	fncVals  []typedArshaler[Options, Coder]
+	fncCache sync.Map // map[reflect.Type]unmarshaler
+}
+type typedArshaler[Options, Coder any] struct {
+	typ reflect.Type
+	fnc func(Options, *Coder, addressableValue) error
+}
+
+type UnmarshalOptions1 struct {
+	// Unmarshalers is a list of type-specific unmarshalers to use.
+	Unmarshalers *arshalers[UnmarshalOptions1, Decoder1]
+}
+
+type Decoder1 struct {
+}
+
+func (a *arshalers[Options, Coder]) lookup(fnc func(Options, *Coder, addressableValue) error, t reflect.Type) func(Options, *Coder, addressableValue) error {
+	return fnc
+}
+
+func UnmarshalFuncV2[T any](fn func(UnmarshalOptions1, *Decoder1, T) error) *arshalers[UnmarshalOptions1, Decoder1] {
+	return &arshalers[UnmarshalOptions1, Decoder1]{}
+}