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https://github.com/golang/go
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8003e79154
Some of these errors are reported in the wrong places. That’s issue #15911 and #15912. Change-Id: Ia09d7f89be4d15f05217a542a61b6ac08090dd87 Reviewed-on: https://go-review.googlesource.com/23588 Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com> Reviewed-by: Keith Randall <khr@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org>
82 lines
1.6 KiB
Go
82 lines
1.6 KiB
Go
// errorcheck
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// Copyright 2016 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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// Verify that switch statements with duplicate cases are detected by the compiler.
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// Does not compile.
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package main
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import "fmt"
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func f0(x int) {
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switch x {
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case 0:
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case 0: // ERROR "duplicate case 0 in switch"
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}
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switch x {
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case 0:
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case int(0): // ERROR "duplicate case 0 in switch"
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}
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}
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func f1(x float32) {
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switch x {
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case 5:
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case 5: // ERROR "duplicate case 5 in switch"
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case 5.0: // ERROR "duplicate case 5 in switch"
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}
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}
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func f2(s string) {
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switch s {
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case "":
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case "": // ERROR "duplicate case .. in switch"
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case "abc":
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case "abc": // ERROR "duplicate case .abc. in switch"
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}
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}
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func f3(e interface{}) {
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switch e {
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case 0:
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case 0: // ERROR "duplicate case 0 in switch"
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case int64(0):
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case float32(10):
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case float32(10): // ERROR "duplicate case float32\(10\) in switch"
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case float64(10):
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case float64(10): // ERROR "duplicate case float64\(10\) in switch"
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}
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}
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func f4(e interface{}) {
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switch e.(type) {
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case int:
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case int: // ERROR "duplicate case int in type switch"
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case int64:
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case error: // ERROR "duplicate case error in type switch"
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case error:
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case fmt.Stringer:
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case fmt.Stringer: // ERROR "duplicate case fmt.Stringer in type switch"
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case struct {
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i int "tag1"
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}:
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case struct {
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i int "tag2"
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}:
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case struct {
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i int "tag1"
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}: // ERROR "duplicate case struct { i int .tag1. } in type switch"
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}
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}
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func f5(a [1]int) {
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switch a {
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case [1]int{0}:
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case [1]int{0}: // OK -- see issue 15896
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}
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}
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