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// run
// Copyright 2017 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.
package main
import "fmt"
func set(m map[interface{}]interface{}, key interface{}) (err error) {
defer func() {
if r := recover(); r != nil {
err = fmt.Errorf("set failed: %v", r)
}
}()
m[key] = nil
return nil
}
func del(m map[interface{}]interface{}, key interface{}) (err error) {
defer func() {
if r := recover(); r != nil {
err = fmt.Errorf("del failed: %v", r)
}
}()
delete(m, key)
return nil
}
func addInt(m map[interface{}]int, key interface{}) (err error) {
defer func() {
if r := recover(); r != nil {
err = fmt.Errorf("addInt failed: %v", r)
}
}()
m[key] += 2018
return nil
}
func addStr(m map[interface{}]string, key interface{}) (err error) {
defer func() {
if r := recover(); r != nil {
err = fmt.Errorf("addStr failed: %v", r)
}
}()
m[key] += "hello, go"
return nil
}
func appendInt(m map[interface{}][]int, key interface{}) (err error) {
defer func() {
if r := recover(); r != nil {
err = fmt.Errorf("appendInt failed: %v", r)
}
}()
m[key] = append(m[key], 2018)
return nil
}
func appendStr(m map[interface{}][]string, key interface{}) (err error) {
defer func() {
if r := recover(); r != nil {
err = fmt.Errorf("addStr failed: %v", r)
}
}()
m[key] = append(m[key], "hello, go")
return nil
}
func main() {
m := make(map[interface{}]interface{})
set(m, []int{1, 2, 3})
set(m, "abc") // used to throw
del(m, []int{1, 2, 3})
del(m, "abc") // used to throw
mi := make(map[interface{}]int)
addInt(mi, []int{1, 2, 3})
addInt(mi, "abc") // used to throw
ms := make(map[interface{}]string)
addStr(ms, []int{1, 2, 3})
addStr(ms, "abc") // used to throw
mia := make(map[interface{}][]int)
appendInt(mia, []int{1, 2, 3})
msa := make(map[interface{}][]string)
appendStr(msa, "abc") // used to throw
}