Initial commit: Go 1.23 release state

test/ddd1.go

@@ -0,0 +1,64 @@
+// errorcheck
+
+// Copyright 2010 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.
+
+// Verify that illegal uses of ... are detected.
+// Does not compile.
+
+package main
+
+import "unsafe"
+
+func sum(args ...int) int { return 0 }
+
+var (
+	_ = sum(1, 2, 3)
+	_ = sum()
+	_ = sum(1.0, 2.0)
+	_ = sum(1.5)      // ERROR "1\.5 .untyped float constant. as int|integer"
+	_ = sum("hello")  // ERROR ".hello. (.untyped string constant. as int|.type untyped string. as type int)|incompatible"
+	_ = sum([]int{1}) // ERROR "\[\]int{.*}.*as int value"
+)
+
+func sum3(int, int, int) int { return 0 }
+func tuple() (int, int, int) { return 1, 2, 3 }
+
+var (
+	_ = sum(tuple())
+	_ = sum(tuple()...) // ERROR "\.{3} with 3-valued|multiple-value"
+	_ = sum3(tuple())
+	_ = sum3(tuple()...) // ERROR "\.{3} in call to non-variadic|multiple-value|invalid use of .*[.][.][.]"
+)
+
+type T []T
+
+func funny(args ...T) int { return 0 }
+
+var (
+	_ = funny(nil)
+	_ = funny(nil, nil)
+	_ = funny([]T{}) // ok because []T{} is a T; passes []T{[]T{}}
+)
+
+func Foo(n int) {}
+
+func bad(args ...int) {
+	print(1, 2, args...)	// ERROR "[.][.][.]"
+	println(args...)	// ERROR "[.][.][.]"
+	ch := make(chan int)
+	close(ch...)	// ERROR "[.][.][.]"
+	_ = len(args...)	// ERROR "[.][.][.]"
+	_ = new(int...)	// ERROR "[.][.][.]"
+	n := 10
+	_ = make([]byte, n...)	// ERROR "[.][.][.]"
+	_ = make([]byte, 10 ...)	// ERROR "[.][.][.]"
+	var x int
+	_ = unsafe.Pointer(&x...)	// ERROR "[.][.][.]"
+	_ = unsafe.Sizeof(x...)	// ERROR "[.][.][.]"
+	_ = [...]byte("foo") // ERROR "[.][.][.]"
+	_ = [...][...]int{{1,2,3},{4,5,6}}	// ERROR "[.][.][.]"
+
+	Foo(x...) // ERROR "\.{3} in call to non-variadic|invalid use of .*[.][.][.]"
+}