| // Copyright 2012 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. |
| |
| // This file contains tests for the rangeloop checker. |
| |
| package testdata |
| |
| func RangeLoopTests() { |
| var s []int |
| for i, v := range s { |
| go func() { |
| println(i) // ERROR "range variable i captured by func literal" |
| println(v) // ERROR "range variable v captured by func literal" |
| }() |
| } |
| for i, v := range s { |
| defer func() { |
| println(i) // ERROR "range variable i captured by func literal" |
| println(v) // ERROR "range variable v captured by func literal" |
| }() |
| } |
| for i := range s { |
| go func() { |
| println(i) // ERROR "range variable i captured by func literal" |
| }() |
| } |
| for _, v := range s { |
| go func() { |
| println(v) // ERROR "range variable v captured by func literal" |
| }() |
| } |
| for i, v := range s { |
| go func() { |
| println(i, v) |
| }() |
| println("unfortunately, we don't catch the error above because of this statement") |
| } |
| for i, v := range s { |
| go func(i, v int) { |
| println(i, v) |
| }(i, v) |
| } |
| for i, v := range s { |
| i, v := i, v |
| go func() { |
| println(i, v) |
| }() |
| } |
| // If the key of the range statement is not an identifier |
| // the code should not panic (it used to). |
| var x [2]int |
| var f int |
| for x[0], f = range s { |
| go func() { |
| _ = f // ERROR "range variable f captured by func literal" |
| }() |
| } |
| type T struct { |
| v int |
| } |
| for _, v := range s { |
| go func() { |
| _ = T{v: 1} |
| _ = []int{v: 1} // ERROR "range variable v captured by func literal" |
| }() |
| } |
| } |