mirror of
https://github.com/golang/go
synced 2024-11-05 15:16:11 -07:00
8931306389
Expressions involving nil, even if they can be evaluated at compile time, do not count as Go constants and cannot be used in const initializers. Fixes #4673. Fixes #4680. R=ken2 CC=golang-dev https://golang.org/cl/7278043
34 lines
681 B
Go
34 lines
681 B
Go
// errorcheck
|
|
|
|
// Copyright 2011 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 len non-constants are not constants, http://golang.org/issue/3244.
|
|
|
|
package p
|
|
|
|
var b struct {
|
|
a[10]int
|
|
}
|
|
|
|
var m map[string][20]int
|
|
|
|
var s [][30]int
|
|
|
|
func f() *[40]int
|
|
var c chan *[50]int
|
|
|
|
const (
|
|
n1 = len(b.a)
|
|
n2 = len(m[""])
|
|
n3 = len(s[10])
|
|
|
|
n4 = len(f()) // ERROR "is not a constant|is not constant"
|
|
n5 = len(<-c) // ERROR "is not a constant|is not constant"
|
|
|
|
n6 = cap(f()) // ERROR "is not a constant|is not constant"
|
|
n7 = cap(<-c) // ERROR "is not a constant|is not constant"
|
|
)
|
|
|