mirror of
https://github.com/golang/go
synced 2024-11-05 18:36:10 -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
72 lines
2.5 KiB
Go
72 lines
2.5 KiB
Go
// errorcheck
|
|
|
|
// Copyright 2013 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.
|
|
|
|
// Issue 4654.
|
|
// Check error for conversion and 'not used' in defer/go.
|
|
|
|
package p
|
|
|
|
import "unsafe"
|
|
|
|
func f() {
|
|
defer int(0) // ERROR "defer requires function call, not conversion"
|
|
go string([]byte("abc")) // ERROR "go requires function call, not conversion"
|
|
|
|
var c complex128
|
|
var f float64
|
|
var t struct {X int}
|
|
|
|
var x []int
|
|
defer append(x, 1) // ERROR "defer discards result of append"
|
|
defer cap(x) // ERROR "defer discards result of cap"
|
|
defer complex(1, 2) // ERROR "defer discards result of complex"
|
|
defer complex(f, 1) // ERROR "defer discards result of complex"
|
|
defer imag(1i) // ERROR "defer discards result of imag"
|
|
defer imag(c) // ERROR "defer discards result of imag"
|
|
defer len(x) // ERROR "defer discards result of len"
|
|
defer make([]int, 1) // ERROR "defer discards result of make"
|
|
defer make(chan bool) // ERROR "defer discards result of make"
|
|
defer make(map[string]int) // ERROR "defer discards result of make"
|
|
defer new(int) // ERROR "defer discards result of new"
|
|
defer real(1i) // ERROR "defer discards result of real"
|
|
defer real(c) // ERROR "defer discards result of real"
|
|
defer append(x, 1) // ERROR "defer discards result of append"
|
|
defer append(x, 1) // ERROR "defer discards result of append"
|
|
defer unsafe.Alignof(t.X) // ERROR "defer discards result of unsafe.Alignof"
|
|
defer unsafe.Offsetof(t.X) // ERROR "defer discards result of unsafe.Offsetof"
|
|
defer unsafe.Sizeof(t) // ERROR "defer discards result of unsafe.Sizeof"
|
|
|
|
defer copy(x, x) // ok
|
|
m := make(map[int]int)
|
|
defer delete(m, 1) // ok
|
|
defer panic(1) // ok
|
|
defer print(1) // ok
|
|
defer println(1) // ok
|
|
defer recover() // ok
|
|
|
|
int(0) // ERROR "int\(0\) evaluated but not used"
|
|
string([]byte("abc")) // ERROR "string\(.*\) evaluated but not used"
|
|
|
|
append(x, 1) // ERROR "not used"
|
|
cap(x) // ERROR "not used"
|
|
complex(1, 2) // ERROR "not used"
|
|
complex(f, 1) // ERROR "not used"
|
|
imag(1i) // ERROR "not used"
|
|
imag(c) // ERROR "not used"
|
|
len(x) // ERROR "not used"
|
|
make([]int, 1) // ERROR "not used"
|
|
make(chan bool) // ERROR "not used"
|
|
make(map[string]int) // ERROR "not used"
|
|
new(int) // ERROR "not used"
|
|
real(1i) // ERROR "not used"
|
|
real(c) // ERROR "not used"
|
|
append(x, 1) // ERROR "not used"
|
|
append(x, 1) // ERROR "not used"
|
|
unsafe.Alignof(t.X) // ERROR "not used"
|
|
unsafe.Offsetof(t.X) // ERROR "not used"
|
|
unsafe.Sizeof(t) // ERROR "not used"
|
|
}
|