Initial commit: Go 1.23 release state

test/fixedbugs/issue59338.go

@@ -0,0 +1,37 @@
+// run
+
+// Copyright 2023 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.
+
+// Smoke test for reverse type inference.
+// The type checker has more expansive tests.
+
+package main
+
+func main() {
+	var f1 func(int) int
+	f1 = g1
+	if f1(1) != g1(1) {
+		panic(1)
+	}
+
+	var f2 func(int) string = g2
+	if f2(2) != "" {
+		panic(2)
+	}
+
+	if g3(g1, 3) != g1(3) {
+		panic(3)
+	}
+
+	if g4(g2, 4) != "" {
+		panic(4)
+	}
+}
+
+func g1[P any](x P) P    { return x }
+func g2[P, Q any](x P) Q { var q Q; return q }
+
+func g3(f1 func(int) int, x int) int       { return f1(x) }
+func g4(f2 func(int) string, x int) string { return f2(x) }