add test of string pointer

maxwell92 · Dec 19, 2017 · adb365b · adb365b
1 parent 3748723
commit adb365b
Showing 1 changed file with 24 additions and 0 deletions.
diff --git a/string/demo1.go b/string/demo1.go
@@ -0,0 +1,24 @@
+package main
+import(
+	"fmt"
+	"reflect"
+	"unsafe"
+)
+
+func pp(ptr interface{}) {
+	p := reflect.ValueOf(ptr).Pointer()
+	h := (*uintptr)(unsafe.Pointer(p))
+	fmt.Printf("%x\n", *h)
+
+}
+
+func main() {
+	s := "abcdefg"	
+	s1 := s[:3]
+
+	fmt.Printf("%#v\n", (*reflect.StringHeader)(unsafe.Pointer(&s)))
+	fmt.Printf("%#v\n", (*reflect.StringHeader)(unsafe.Pointer(&s1)))
+
+	ptr := &s
+	pp(ptr)
+}