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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
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// Copyright 2013 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// Issue 4654.
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// Check error for conversion and 'not used' in defer/go.
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package p
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import "unsafe"
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func f() {
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defer int(0) // ERROR "defer requires function call, not conversion"
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go string([]byte("abc")) // ERROR "go requires function call, not conversion"
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var c complex128
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var f float64
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var t struct {X int}
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var x []int
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defer append(x, 1) // ERROR "defer discards result of append"
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defer cap(x) // ERROR "defer discards result of cap"
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defer complex(1, 2) // ERROR "defer discards result of complex"
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defer complex(f, 1) // ERROR "defer discards result of complex"
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defer imag(1i) // ERROR "defer discards result of imag"
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defer imag(c) // ERROR "defer discards result of imag"
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defer len(x) // ERROR "defer discards result of len"
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defer make([]int, 1) // ERROR "defer discards result of make"
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defer make(chan bool) // ERROR "defer discards result of make"
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defer make(map[string]int) // ERROR "defer discards result of make"
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defer new(int) // ERROR "defer discards result of new"
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defer real(1i) // ERROR "defer discards result of real"
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defer real(c) // ERROR "defer discards result of real"
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defer append(x, 1) // ERROR "defer discards result of append"
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defer append(x, 1) // ERROR "defer discards result of append"
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defer unsafe.Alignof(t.X) // ERROR "defer discards result of unsafe.Alignof"
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defer unsafe.Offsetof(t.X) // ERROR "defer discards result of unsafe.Offsetof"
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defer unsafe.Sizeof(t) // ERROR "defer discards result of unsafe.Sizeof"
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defer copy(x, x) // ok
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m := make(map[int]int)
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defer delete(m, 1) // ok
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defer panic(1) // ok
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defer print(1) // ok
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defer println(1) // ok
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defer recover() // ok
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int(0) // ERROR "int\(0\) evaluated but not used"
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string([]byte("abc")) // ERROR "string\(.*\) evaluated but not used"
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append(x, 1) // ERROR "not used"
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cap(x) // ERROR "not used"
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complex(1, 2) // ERROR "not used"
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complex(f, 1) // ERROR "not used"
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imag(1i) // ERROR "not used"
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imag(c) // ERROR "not used"
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len(x) // ERROR "not used"
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make([]int, 1) // ERROR "not used"
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make(chan bool) // ERROR "not used"
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make(map[string]int) // ERROR "not used"
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new(int) // ERROR "not used"
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real(1i) // ERROR "not used"
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real(c) // ERROR "not used"
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append(x, 1) // ERROR "not used"
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append(x, 1) // ERROR "not used"
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unsafe.Alignof(t.X) // ERROR "not used"
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unsafe.Offsetof(t.X) // ERROR "not used"
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unsafe.Sizeof(t) // ERROR "not used"
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}
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