46 lines
866 B
Go
46 lines
866 B
Go
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// For more tutorials: https://blog.learngoprogramming.com
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//
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// Copyright © 2018 Inanc Gumus
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// Learn Go Programming Course
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// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
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//
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package main
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import (
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"fmt"
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"unsafe"
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)
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func main() {
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// empty := ""
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// dump(empty)
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hello := "hello"
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dump(hello)
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dump("hello")
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dump("hello!")
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for i := range hello {
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dump(hello[i : i+1])
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}
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dump(string([]byte(hello)))
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dump(string([]byte(hello)))
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dump(string([]rune(hello)))
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}
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// StringHeader is used by a string value
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// In practice, you should use: reflect.Header
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type StringHeader struct {
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// points to a backing array's item
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pointer uintptr // where it starts
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length int // where it ends
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}
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// dump prints the string header of a string value
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func dump(s string) {
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ptr := *(*StringHeader)(unsafe.Pointer(&s))
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fmt.Printf("%q: %+v\n", s, ptr)
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}
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