mirror of
https://github.com/golang/go
synced 2024-11-02 13:42:29 +00:00
bf18d57d4a
This is from CL 5451105 but was dropped from that CL. See also CL 6137051. The only change compared to 5451105 is to check for h != nil in reflect·mapiterinit; allowing use of nil maps must have happened after that original CL. Fixes #3573. R=golang-dev, dave, r CC=golang-dev https://golang.org/cl/6215078
139 lines
2.5 KiB
Go
139 lines
2.5 KiB
Go
// run
|
|
|
|
// Copyright 2009 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.
|
|
|
|
// Internally a map holds elements in up to 255 bytes of key+value.
|
|
// When key or value or both are too large, it uses pointers to key+value
|
|
// instead. Test all the combinations.
|
|
|
|
package main
|
|
|
|
func seq(x, y int) [1000]byte {
|
|
var r [1000]byte
|
|
for i := 0; i < len(r); i++ {
|
|
r[i] = byte(x + i*y)
|
|
}
|
|
return r
|
|
}
|
|
|
|
func cmp(x, y [1000]byte) {
|
|
for i := 0; i < len(x); i++ {
|
|
if x[i] != y[i] {
|
|
panic("BUG mismatch")
|
|
}
|
|
}
|
|
}
|
|
|
|
func main() {
|
|
m := make(map[int][1000]byte)
|
|
m[1] = seq(11, 13)
|
|
m[2] = seq(2, 9)
|
|
m[3] = seq(3, 17)
|
|
|
|
cmp(m[1], seq(11, 13))
|
|
cmp(m[2], seq(2, 9))
|
|
cmp(m[3], seq(3, 17))
|
|
|
|
|
|
{
|
|
type T [1]byte
|
|
type V [1]byte
|
|
m := make(map[T]V)
|
|
m[T{}] = V{1}
|
|
m[T{1}] = V{2}
|
|
if x, y := m[T{}][0], m[T{1}][0]; x != 1 || y != 2 {
|
|
println(x, y)
|
|
panic("bad map")
|
|
}
|
|
}
|
|
{
|
|
type T [100]byte
|
|
type V [1]byte
|
|
m := make(map[T]V)
|
|
m[T{}] = V{1}
|
|
m[T{1}] = V{2}
|
|
if x, y := m[T{}][0], m[T{1}][0]; x != 1 || y != 2 {
|
|
println(x, y)
|
|
panic("bad map")
|
|
}
|
|
}
|
|
{
|
|
type T [1]byte
|
|
type V [100]byte
|
|
m := make(map[T]V)
|
|
m[T{}] = V{1}
|
|
m[T{1}] = V{2}
|
|
if x, y := m[T{}][0], m[T{1}][0]; x != 1 || y != 2 {
|
|
println(x, y)
|
|
panic("bad map")
|
|
}
|
|
}
|
|
{
|
|
type T [1000]byte
|
|
type V [1]byte
|
|
m := make(map[T]V)
|
|
m[T{}] = V{1}
|
|
m[T{1}] = V{2}
|
|
if x, y := m[T{}][0], m[T{1}][0]; x != 1 || y != 2 {
|
|
println(x, y)
|
|
panic("bad map")
|
|
}
|
|
}
|
|
{
|
|
type T [1]byte
|
|
type V [1000]byte
|
|
m := make(map[T]V)
|
|
m[T{}] = V{1}
|
|
m[T{1}] = V{2}
|
|
if x, y := m[T{}][0], m[T{1}][0]; x != 1 || y != 2 {
|
|
println(x, y)
|
|
panic("bad map")
|
|
}
|
|
}
|
|
{
|
|
type T [1000]byte
|
|
type V [1000]byte
|
|
m := make(map[T]V)
|
|
m[T{}] = V{1}
|
|
m[T{1}] = V{2}
|
|
if x, y := m[T{}][0], m[T{1}][0]; x != 1 || y != 2 {
|
|
println(x, y)
|
|
panic("bad map")
|
|
}
|
|
}
|
|
{
|
|
type T [200]byte
|
|
type V [1]byte
|
|
m := make(map[T]V)
|
|
m[T{}] = V{1}
|
|
m[T{1}] = V{2}
|
|
if x, y := m[T{}][0], m[T{1}][0]; x != 1 || y != 2 {
|
|
println(x, y)
|
|
panic("bad map")
|
|
}
|
|
}
|
|
{
|
|
type T [1]byte
|
|
type V [200]byte
|
|
m := make(map[T]V)
|
|
m[T{}] = V{1}
|
|
m[T{1}] = V{2}
|
|
if x, y := m[T{}][0], m[T{1}][0]; x != 1 || y != 2 {
|
|
println(x, y)
|
|
panic("bad map")
|
|
}
|
|
}
|
|
{
|
|
type T [200]byte
|
|
type V [200]byte
|
|
m := make(map[T]V)
|
|
m[T{}] = V{1}
|
|
m[T{1}] = V{2}
|
|
if x, y := m[T{}][0], m[T{1}][0]; x != 1 || y != 2 {
|
|
println(x, y)
|
|
panic("bad map")
|
|
}
|
|
}
|
|
}
|