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https://github.com/golang/go
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2c95e3a6a8
This CL changes "T literal.M" error message to "T{...}.M". It's clearer
expression and focusing user on actual issue.
Updates #38745
Change-Id: I84b455a86742f37e0bde5bf390aa02984eecc3c9
Reviewed-on: https://go-review.googlesource.com/c/go/+/253677
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
108 lines
2.8 KiB
Go
108 lines
2.8 KiB
Go
// errorcheck -0 -m -l
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// Copyright 2015 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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// Test escape analysis for maps.
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package escape
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var sink interface{}
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func map0() {
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m := make(map[*int]*int) // ERROR "make\(map\[\*int\]\*int\) does not escape"
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// BAD: i should not escape
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i := 0 // ERROR "moved to heap: i"
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// BAD: j should not escape
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j := 0 // ERROR "moved to heap: j"
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m[&i] = &j
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_ = m
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}
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func map1() *int {
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m := make(map[*int]*int) // ERROR "make\(map\[\*int\]\*int\) does not escape"
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// BAD: i should not escape
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i := 0 // ERROR "moved to heap: i"
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j := 0 // ERROR "moved to heap: j"
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m[&i] = &j
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return m[&i]
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}
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func map2() map[*int]*int {
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m := make(map[*int]*int) // ERROR "make\(map\[\*int\]\*int\) escapes to heap"
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i := 0 // ERROR "moved to heap: i"
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j := 0 // ERROR "moved to heap: j"
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m[&i] = &j
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return m
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}
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func map3() []*int {
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m := make(map[*int]*int) // ERROR "make\(map\[\*int\]\*int\) does not escape"
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i := 0 // ERROR "moved to heap: i"
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// BAD: j should not escape
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j := 0 // ERROR "moved to heap: j"
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m[&i] = &j
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var r []*int
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for k := range m {
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r = append(r, k)
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}
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return r
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}
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func map4() []*int {
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m := make(map[*int]*int) // ERROR "make\(map\[\*int\]\*int\) does not escape"
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// BAD: i should not escape
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i := 0 // ERROR "moved to heap: i"
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j := 0 // ERROR "moved to heap: j"
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m[&i] = &j
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var r []*int
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for k, v := range m {
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// We want to test exactly "for k, v := range m" rather than "for _, v := range m".
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// The following if is merely to use (but not leak) k.
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if k != nil {
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r = append(r, v)
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}
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}
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return r
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}
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func map5(m map[*int]*int) { // ERROR "m does not escape"
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i := 0 // ERROR "moved to heap: i"
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j := 0 // ERROR "moved to heap: j"
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m[&i] = &j
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}
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func map6(m map[*int]*int) { // ERROR "m does not escape"
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if m != nil {
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m = make(map[*int]*int) // ERROR "make\(map\[\*int\]\*int\) does not escape"
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}
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i := 0 // ERROR "moved to heap: i"
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j := 0 // ERROR "moved to heap: j"
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m[&i] = &j
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}
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func map7() {
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// BAD: i should not escape
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i := 0 // ERROR "moved to heap: i"
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// BAD: j should not escape
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j := 0 // ERROR "moved to heap: j"
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m := map[*int]*int{&i: &j} // ERROR "map\[\*int\]\*int{...} does not escape"
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_ = m
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}
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func map8() {
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i := 0 // ERROR "moved to heap: i"
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j := 0 // ERROR "moved to heap: j"
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m := map[*int]*int{&i: &j} // ERROR "map\[\*int\]\*int{...} escapes to heap"
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sink = m
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}
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func map9() *int {
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// BAD: i should not escape
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i := 0 // ERROR "moved to heap: i"
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j := 0 // ERROR "moved to heap: j"
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m := map[*int]*int{&i: &j} // ERROR "map\[\*int\]\*int{...} does not escape"
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return m[nil]
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}
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