1 files changed, 46 insertions, 0 deletions
diff --git a/src/cmd/compile/internal/syntax/testdata/tparams.go b/src/cmd/compile/internal/syntax/testdata/tparams.go
new file mode 100644
index 0000000..646fbbe
--- /dev/null
+++ b/src/cmd/compile/internal/syntax/testdata/tparams.go
@@ -0,0 +1,46 @@
+// Copyright 2020 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 p
+
+type t[a, b /* ERROR missing type constraint */ ] struct{}
+type t[a t, b t, c /* ERROR missing type constraint */ ] struct{}
+type t struct {
+	t [n]byte
+	t[a]
+	t[a, b]
+}
+type t interface {
+	t[a]
+	m /* ERROR method must have no type parameters */ [_ _, /* ERROR mixed */ _]()
+	t[a, b]
+}
+
+func f[ /* ERROR empty type parameter list */ ]()
+func f[a, b /* ERROR missing type constraint */ ]()
+func f[a t, b t, c /* ERROR missing type constraint */ ]()
+
+func f[a b,  /* ERROR expected ] */ 0] ()
+
+// issue #49482
+type (
+	t[a *[]int] struct{}
+	t[a *t,] struct{}
+	t[a *t|[]int] struct{}
+	t[a *t|t,] struct{}
+	t[a *t|~t,] struct{}
+	t[a *struct{}|t] struct{}
+	t[a *t|struct{}] struct{}
+	t[a *struct{}|~t] struct{}
+)
+
+// issue #51488
+type (
+	t[a *t|t,] struct{}
+	t[a *t|t, b t] struct{}
+	t[a *t|t] struct{}
+	t[a *[]t|t] struct{}
+	t[a ([]t)] struct{}
+	t[a ([]t)|t] struct{}
+)