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https://github.com/golang/go
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b4e92cee97
Design doc at golang.org/s/go12slice. This is an experimental feature and may not be included in the release. R=golang-dev, r CC=golang-dev https://golang.org/cl/10743046
122 lines
4.4 KiB
Go
122 lines
4.4 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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package p
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var array *[10]int
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var slice []int
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var str string
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var i, j, k int
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func f() {
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// check what missing arguments are allowed
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_ = array[:]
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_ = array[i:]
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_ = array[:j]
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_ = array[i:j]
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_ = array[::] // ERROR "middle index required in 3-index slice" "final index required in 3-index slice"
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_ = array[i::] // ERROR "middle index required in 3-index slice" "final index required in 3-index slice"
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_ = array[:j:] // ERROR "final index required in 3-index slice"
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_ = array[i:j:] // ERROR "final index required in 3-index slice"
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_ = array[::k] // ERROR "middle index required in 3-index slice"
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_ = array[i::k] // ERROR "middle index required in 3-index slice"
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_ = array[:j:k]
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_ = array[i:j:k]
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_ = slice[:]
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_ = slice[i:]
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_ = slice[:j]
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_ = slice[i:j]
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_ = slice[::] // ERROR "middle index required in 3-index slice" "final index required in 3-index slice"
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_ = slice[i::] // ERROR "middle index required in 3-index slice" "final index required in 3-index slice"
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_ = slice[:j:] // ERROR "final index required in 3-index slice"
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_ = slice[i:j:] // ERROR "final index required in 3-index slice"
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_ = slice[::k] // ERROR "middle index required in 3-index slice"
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_ = slice[i::k] // ERROR "middle index required in 3-index slice"
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_ = slice[:j:k]
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_ = slice[i:j:k]
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_ = str[:]
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_ = str[i:]
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_ = str[:j]
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_ = str[i:j]
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_ = str[::] // ERROR "3-index slice of string" "middle index required in 3-index slice" "final index required in 3-index slice"
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_ = str[i::] // ERROR "3-index slice of string" "middle index required in 3-index slice" "final index required in 3-index slice"
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_ = str[:j:] // ERROR "3-index slice of string" "final index required in 3-index slice"
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_ = str[i:j:] // ERROR "3-index slice of string" "final index required in 3-index slice"
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_ = str[::k] // ERROR "3-index slice of string" "middle index required in 3-index slice"
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_ = str[i::k] // ERROR "3-index slice of string" "middle index required in 3-index slice"
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_ = str[:j:k] // ERROR "3-index slice of string"
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_ = str[i:j:k] // ERROR "3-index slice of string"
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// check invalid indices
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_ = array[1:2]
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_ = array[2:1] // ERROR "invalid slice index"
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_ = array[2:2]
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_ = array[i:1]
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_ = array[1:j]
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_ = array[1:2:3]
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_ = array[1:3:2] // ERROR "invalid slice index"
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_ = array[2:1:3] // ERROR "invalid slice index"
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_ = array[2:3:1] // ERROR "invalid slice index"
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_ = array[3:1:2] // ERROR "invalid slice index"
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_ = array[3:2:1] // ERROR "invalid slice index"
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_ = array[i:1:2]
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_ = array[i:2:1] // ERROR "invalid slice index"
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_ = array[1:j:2]
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_ = array[2:j:1] // ERROR "invalid slice index"
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_ = array[1:2:k]
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_ = array[2:1:k] // ERROR "invalid slice index"
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_ = slice[1:2]
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_ = slice[2:1] // ERROR "invalid slice index"
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_ = slice[2:2]
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_ = slice[i:1]
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_ = slice[1:j]
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_ = slice[1:2:3]
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_ = slice[1:3:2] // ERROR "invalid slice index"
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_ = slice[2:1:3] // ERROR "invalid slice index"
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_ = slice[2:3:1] // ERROR "invalid slice index"
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_ = slice[3:1:2] // ERROR "invalid slice index"
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_ = slice[3:2:1] // ERROR "invalid slice index"
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_ = slice[i:1:2]
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_ = slice[i:2:1] // ERROR "invalid slice index"
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_ = slice[1:j:2]
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_ = slice[2:j:1] // ERROR "invalid slice index"
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_ = slice[1:2:k]
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_ = slice[2:1:k] // ERROR "invalid slice index"
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_ = str[1:2]
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_ = str[2:1] // ERROR "invalid slice index"
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_ = str[2:2]
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_ = str[i:1]
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_ = str[1:j]
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// check out of bounds indices on array
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_ = array[11:11] // ERROR "out of bounds for 10-element array"
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_ = array[11:12] // ERROR "out of bounds for 10-element array"
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_ = array[11:] // ERROR "out of bounds for 10-element array"
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_ = array[:11] // ERROR "out of bounds for 10-element array"
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_ = array[1:11] // ERROR "out of bounds for 10-element array"
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_ = array[1:11:12] // ERROR "out of bounds for 10-element array"
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_ = array[1:2:11] // ERROR "out of bounds for 10-element array"
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_ = array[1:11:3] // ERROR "out of bounds for 10-element array"
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_ = array[11:2:3] // ERROR "out of bounds for 10-element array"
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_ = array[11:12:13] // ERROR "out of bounds for 10-element array"
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// slice bounds not checked
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_ = slice[11:11]
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_ = slice[11:12]
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_ = slice[11:]
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_ = slice[:11]
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_ = slice[1:11]
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_ = slice[1:11:12]
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_ = slice[1:2:11]
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_ = slice[1:11:3] // ERROR "invalid slice index"
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_ = slice[11:2:3] // ERROR "invalid slice index"
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_ = slice[11:12:13]
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}
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