Initial commit: Go 1.23 release state

test/named1.go

@@ -0,0 +1,62 @@
+// errorcheck
+
+// Copyright 2009 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.
+
+// Test that basic operations on named types are valid
+// and preserve the type.
+// Does not compile.
+
+package main
+
+type Bool bool
+
+type Map map[int]int
+
+func (Map) M() {}
+
+type Slice []byte
+
+var slice Slice
+
+func asBool(Bool)     {}
+func asString(String) {}
+
+type String string
+
+func main() {
+	var (
+		b    Bool = true
+		i, j int
+		c    = make(chan int)
+		m    = make(Map)
+	)
+
+	asBool(b)
+	asBool(!b)
+	asBool(true)
+	asBool(*&b)
+	asBool(Bool(true))
+	asBool(1 != 2) // ok now
+	asBool(i < j)  // ok now
+
+	_, b = m[2] // ok now
+
+	var inter interface{}
+	_, b = inter.(Map) // ok now
+	_ = b
+
+	var minter interface {
+		M()
+	}
+	_, b = minter.(Map) // ok now
+	_ = b
+
+	_, bb := <-c
+	asBool(bb) // ERROR "cannot use.*type bool.*as type Bool|cannot use bb"
+	_, b = <-c // ok now
+	_ = b
+
+	asString(String(slice)) // ok
+}