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https://github.com/golang/go
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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
140 lines
2.5 KiB
Go
140 lines
2.5 KiB
Go
// run
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// Copyright 2009 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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// Internally a map holds elements in up to 255 bytes of key+value.
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// When key or value or both are too large, it uses pointers to key+value
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// instead. Test all the combinations.
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package main
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func seq(x, y int) [1000]byte {
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var r [1000]byte
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for i := 0; i < len(r); i++ {
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r[i] = byte(x + i*y)
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}
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return r
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}
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func cmp(x, y [1000]byte) {
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for i := 0; i < len(x); i++ {
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if x[i] != y[i] {
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panic("BUG mismatch")
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}
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}
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}
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func main() {
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m := make(map[int][1000]byte)
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m[1] = seq(11, 13)
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m[2] = seq(2, 9)
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m[3] = seq(3, 17)
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cmp(m[1], seq(11, 13))
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cmp(m[2], seq(2, 9))
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cmp(m[3], seq(3, 17))
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{
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type T [1]byte
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type V [1]byte
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m := make(map[T]V)
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m[T{}] = V{1}
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m[T{1}] = V{2}
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if x, y := m[T{}][0], m[T{1}][0]; x != 1 || y != 2 {
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println(x, y)
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panic("bad map")
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}
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}
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{
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type T [100]byte
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type V [1]byte
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m := make(map[T]V)
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m[T{}] = V{1}
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m[T{1}] = V{2}
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if x, y := m[T{}][0], m[T{1}][0]; x != 1 || y != 2 {
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println(x, y)
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panic("bad map")
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}
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}
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{
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type T [1]byte
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type V [100]byte
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m := make(map[T]V)
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m[T{}] = V{1}
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m[T{1}] = V{2}
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if x, y := m[T{}][0], m[T{1}][0]; x != 1 || y != 2 {
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println(x, y)
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panic("bad map")
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}
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}
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{
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type T [1000]byte
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type V [1]byte
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m := make(map[T]V)
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m[T{}] = V{1}
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m[T{1}] = V{2}
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if x, y := m[T{}][0], m[T{1}][0]; x != 1 || y != 2 {
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println(x, y)
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panic("bad map")
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}
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}
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{
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type T [1]byte
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type V [1000]byte
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m := make(map[T]V)
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m[T{}] = V{1}
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m[T{1}] = V{2}
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if x, y := m[T{}][0], m[T{1}][0]; x != 1 || y != 2 {
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println(x, y)
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panic("bad map")
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}
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}
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{
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type T [1000]byte
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type V [1000]byte
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m := make(map[T]V)
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m[T{}] = V{1}
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m[T{1}] = V{2}
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if x, y := m[T{}][0], m[T{1}][0]; x != 1 || y != 2 {
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println(x, y)
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panic("bad map")
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}
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}
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{
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type T [200]byte
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type V [1]byte
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m := make(map[T]V)
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m[T{}] = V{1}
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m[T{1}] = V{2}
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if x, y := m[T{}][0], m[T{1}][0]; x != 1 || y != 2 {
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println(x, y)
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panic("bad map")
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}
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}
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{
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type T [1]byte
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type V [200]byte
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m := make(map[T]V)
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m[T{}] = V{1}
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m[T{1}] = V{2}
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if x, y := m[T{}][0], m[T{1}][0]; x != 1 || y != 2 {
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println(x, y)
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panic("bad map")
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}
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}
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{
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type T [200]byte
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type V [200]byte
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m := make(map[T]V)
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m[T{}] = V{1}
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m[T{1}] = V{2}
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if x, y := m[T{}][0], m[T{1}][0]; x != 1 || y != 2 {
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println(x, y)
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panic("bad map")
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}
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}
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}
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