reflect.ValueOf(options))fmt.Println("infos.class type:",reflect.TypeOf(options.(map[string]interface{})["class"]))fmt.Println("infos.class value:",reflect.ValueOf(options.(map[string]interface{})["class"]))fmt.
reflect.TypeOf(b):int32 Kind:int32 种类定义点击查看 2.2 引用指向元素的类型 // Elem returns a type's element type. // It panics if the type's Kind is not Array, Chan, Map, Pointer, or Slice. Elem() Type 部分情况我们需要获取指针指向元素的类型、或者slice元素的类型,可以reflect.Elem()...
slice := []string{"hello", "world"} type sliceHeader struct { Data unsafe.Pointer Len int Cap int } header := (*sliceHeader)(unsafe.Pointer(&slice)) fmt.Println(header.Len) elementType := reflect.TypeOf(slice).Elem() secondElementPtr := uintptr(header.Data) + elementType.Size() *(...
if t.Kind()== reflect.Ptr { //if it is pointer, get it element type tt := t.Elem() if t.Kind() == reflect.Interface { fmt.Println(t.PkgPath(), t.Name()) for i := 0; i < tt.NumMethod(); i++ { f := tt.Method(i) fmt.Println(i, f) } } } v :=reflect.ValueO...
slice的结构体非常简单 type slice struct { array unsafe.Pointer //数组指针 len int //数组长度 cap int //数组容量 } //cap指的是目前slice可装载的最大元素数量,即申请的空间,len指的是目前元素数量 我们新建一个make.go文件,在这里我们新建一个int型slice。 //创建一个silce package main import ( "...
slice := []string{"hello", "world"} type sliceHeader struct { Data unsafe.Pointer Len int Cap int } header := (*sliceHeader)(unsafe.Pointer(&slice)) fmt.Println(header.Len) elementType := reflect.TypeOf(slice).Elem() secondElementPtr := uintptr(header.Data) + elementType.Size() *...
// The reflect_growslice that calls growslice will manually clear // the region not cleared here. memclrNoHeapPointers(add(p, newlenmem), capmem-newlenmem) }else{ // Note: can't use rawmem (which avoids zeroing of memory), because then GC can scan uninitialized memory. ...
// A notInHeapSlice is a slice backed by runtime/internal/sys.NotInHeap memory. // notInHeapSlice是由runtime/internal/sys.NotInHeap内存支持的切片。 type notInHeapSlice struct { array *notInHeap len int cap int } func panicmakeslicelen() { ...
ReflectStructElem函数首先通过reflect.ValueOf获取reflect.Value类型,在通过reflect.Value类型的NumField获取实际结构体内的成员个数。rvalue.Field(i)根据索引依次获取结构体每个成员,elevalue类型为reflect.Value类型,所以可以通过Kind,Type等方法获取成员的类型和种类。我们在主函数调用上面的方法 1 1. ReflectTypeValue...
聊聊golang的zap的ReflectType 序 本文主要研究一下golang的zap的ReflectType sweetenFields zap@v1.16.0/sugar.go func (s *SugaredLogger) sweetenFields(args []interface{}) []Field { if len(args) == 0 { return nil } // Allocate enough space for the worst case; if users pass only structured...