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feat: 字符串 -> 基础数据类型转换, 使用泛型实现

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This commit is contained in:
白茶清欢
2025-10-13 11:40:08 +08:00
parent 460672bcd0
commit 20d2912274
7 changed files with 515 additions and 6 deletions
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22
define/result.go Normal file
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@ -0,0 +1,22 @@
// Package define ...
//
// Description : define ...
//
// Author : go_developer@163.com<白茶清欢>
//
// Date : 2025-10-13 11:22
package define
import "git.zhangdeman.cn/zhangdeman/op_type"
// BaseValueResult 基础类型转换结果
type BaseValueResult[BaseType op_type.BaseType] struct {
Value BaseType `json:"result"` // 转换结果
Err error `json:"err"` // 错误信息
}
// BaseValuePtrResult 基础类型指针转换结果
type BaseValuePtrResult[BaseType op_type.BaseType] struct {
Value *BaseType `json:"result"` // 转换结果
Err error `json:"err"` // 错误信息
}

9
go.mod
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@ -1,6 +1,6 @@
module git.zhangdeman.cn/zhangdeman/wrapper
go 1.23.0
go 1.24.0
require (
git.zhangdeman.cn/zhangdeman/consts v0.0.0-20250916024308-d378e6c57772
@ -8,6 +8,7 @@ require (
git.zhangdeman.cn/zhangdeman/serialize v0.0.0-20250504055908-8d68e6106ea9
git.zhangdeman.cn/zhangdeman/util v0.0.0-20240618042405-6ee2c904644e
github.com/axgle/mahonia v0.0.0-20180208002826-3358181d7394
github.com/smartystreets/goconvey v1.8.1
github.com/spaolacci/murmur3 v1.1.0
github.com/stretchr/testify v1.11.1
github.com/tidwall/gjson v1.18.0
@ -17,11 +18,17 @@ require (
github.com/BurntSushi/toml v1.5.0 // indirect
github.com/davecgh/go-spew v1.1.1 // indirect
github.com/go-ini/ini v1.67.0 // indirect
github.com/gopherjs/gopherjs v1.17.2 // indirect
github.com/jtolds/gls v4.20.0+incompatible // indirect
github.com/mitchellh/go-homedir v1.1.0 // indirect
github.com/mozillazg/go-pinyin v0.20.0 // indirect
github.com/pmezard/go-difflib v1.0.0 // indirect
github.com/sbabiv/xml2map v1.2.1 // indirect
github.com/smarty/assertions v1.15.0 // indirect
github.com/tidwall/match v1.2.0 // indirect
github.com/tidwall/pretty v1.2.1 // indirect
golang.org/x/mod v0.9.0 // indirect
golang.org/x/sys v0.6.0 // indirect
golang.org/x/tools v0.7.0 // indirect
gopkg.in/yaml.v3 v3.0.1 // indirect
)

8
go.sum
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@ -34,8 +34,6 @@ github.com/smartystreets/goconvey v1.8.1 h1:qGjIddxOk4grTu9JPOU31tVfq3cNdBlNa5sS
github.com/smartystreets/goconvey v1.8.1/go.mod h1:+/u4qLyY6x1jReYOp7GOM2FSt8aP9CzCZL03bI28W60=
github.com/spaolacci/murmur3 v1.1.0 h1:7c1g84S4BPRrfL5Xrdp6fOJ206sU9y293DDHaoy0bLI=
github.com/spaolacci/murmur3 v1.1.0/go.mod h1:JwIasOWyU6f++ZhiEuf87xNszmSA2myDM2Kzu9HwQUA=
github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg=
github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
github.com/stretchr/testify v1.11.1 h1:7s2iGBzp5EwR7/aIZr8ao5+dra3wiQyKjjFuvgVKu7U=
github.com/stretchr/testify v1.11.1/go.mod h1:wZwfW3scLgRK+23gO65QZefKpKQRnfz6sD981Nm4B6U=
github.com/tidwall/gjson v1.18.0 h1:FIDeeyB800efLX89e5a8Y0BNH+LOngJyGrIWxG2FKQY=
@ -46,6 +44,12 @@ github.com/tidwall/match v1.2.0/go.mod h1:eRSPERbgtNPcGhD8UCthc6PmLEQXEWd3PRB5JT
github.com/tidwall/pretty v1.2.0/go.mod h1:ITEVvHYasfjBbM0u2Pg8T2nJnzm8xPwvNhhsoaGGjNU=
github.com/tidwall/pretty v1.2.1 h1:qjsOFOWWQl+N3RsoF5/ssm1pHmJJwhjlSbZ51I6wMl4=
github.com/tidwall/pretty v1.2.1/go.mod h1:ITEVvHYasfjBbM0u2Pg8T2nJnzm8xPwvNhhsoaGGjNU=
golang.org/x/mod v0.9.0 h1:KENHtAZL2y3NLMYZeHY9DW8HW8V+kQyJsY/V9JlKvCs=
golang.org/x/mod v0.9.0/go.mod h1:iBbtSCu2XBx23ZKBPSOrRkjjQPZFPuis4dIYUhu/chs=
golang.org/x/sys v0.6.0 h1:MVltZSvRTcU2ljQOhs94SXPftV6DCNnZViHeQps87pQ=
golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/tools v0.7.0 h1:W4OVu8VVOaIO0yzWMNdepAulS7YfoS3Zabrm8DOXXU4=
golang.org/x/tools v0.7.0/go.mod h1:4pg6aUX35JBAogB10C9AtvVL+qowtN4pT3CGSQex14s=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=

6
map_test.go
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@ -22,11 +22,11 @@ func TestMap_Exist(t *testing.T) {
func TestMap_IsNil(t *testing.T) {
var (
m Map
m1 *Map
m Map
//m1 *Map
)
fmt.Println(m.Set("a", 1))
fmt.Println(m.IsNil(), m1.IsNil())
//fmt.Println(m.IsNil(), m1.IsNil())
}
func TestMap_IsMasher(t *testing.T) {

50
op_string/base.go Normal file
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@ -0,0 +1,50 @@
// Package op_string ...
//
// Description : op_string ...
//
// Author : go_developer@163.com<白茶清欢>
//
// Date : 2025-10-13 11:18
package op_string
import (
"git.zhangdeman.cn/zhangdeman/op_type"
"git.zhangdeman.cn/zhangdeman/wrapper/define"
"git.zhangdeman.cn/zhangdeman/wrapper/tool"
)
// ToBaseValue 转换为基础数据类型
func ToBaseValue[BaseType op_type.BaseType](str string) define.BaseValueResult[BaseType] {
var (
err error
target BaseType
)
if err = tool.ConvertAssign(&target, str); nil != err {
return define.BaseValueResult[BaseType]{
Value: target,
Err: err,
}
}
return define.BaseValueResult[BaseType]{
Value: target,
Err: err,
}
}
// ToBaseValuePtr 转换为基础数据类型指针
func ToBaseValuePtr[BaseType op_type.BaseType](str string) define.BaseValuePtrResult[BaseType] {
var (
err error
target BaseType
)
if err = tool.ConvertAssign(&target, str); nil != err {
return define.BaseValuePtrResult[BaseType]{
Value: nil,
Err: err,
}
}
return define.BaseValuePtrResult[BaseType]{
Value: &target,
Err: err,
}
}

32
op_string/base_test.go Normal file
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@ -0,0 +1,32 @@
// Package op_string ...
//
// Description : op_string ...
//
// Author : go_developer@163.com<白茶清欢>
//
// Date : 2025-10-13 11:28
package op_string
import (
"reflect"
"testing"
. "github.com/smartystreets/goconvey/convey"
)
func TestToBaseValue(t *testing.T) {
Convey("测试ToBaseValue - uint64 转换成功", t, func() {
res := ToBaseValue[uint64]("12345")
So(res.Err, ShouldBeNil)
So(res.Value, ShouldEqual, uint64(12345))
So(reflect.TypeOf(res.Value).Kind(), ShouldEqual, reflect.Uint64)
So(reflect.TypeOf(res.Value).Kind(), ShouldNotEqual, reflect.Uint32)
})
Convey("测试ToBaseValue - uint64 转换失败", t, func() {
res := ToBaseValue[uint64]("s12345")
So(res.Err, ShouldNotBeNil)
So(res.Value, ShouldEqual, 0)
So(reflect.TypeOf(res.Value).Kind(), ShouldEqual, reflect.Uint64)
So(reflect.TypeOf(res.Value).Kind(), ShouldNotEqual, reflect.Uint32)
})
}

394
tool/convert.go Normal file
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@ -0,0 +1,394 @@
// Package tool ...
//
// Description : 任意类型之间的相互转换
//
// Author : go_developer@163.com<白茶清欢>
//
// Date : 2021-02-23 10:23 下午
package tool
/*
Desc : 在处理一些参数的时候，可能需要将参数转换为各种类型，这里实现一个通用的转换函数，实现各种类型之间的相互转换。
当然，如果源数据格式和目标数据类型不一致，是会返回错误的。例如将字符串“一二三”转换为数值类型则会报错，而将字符串“123”转换为数值类型则OK。
这段代码实际抄自go自带的“database/sql”库，只是源代码作为内部函数无法在外面调用，可以单独把需要的功能拎出来使用：
代码中有一个Scaner接口，可以自行实现，然后通过"convertAssign()"函数，作为dst参数传入。
Author : zhangdeman001@ke.com<白茶清欢>
*/
import (
"errors"
"fmt"
"reflect"
"strconv"
"time"
)
// RawBytes is a byte slice that holds a reference to memory owned by
// the database itself. After a Scan into a RawBytes, the slice is only
// valid until the next call to Next, Scan, or Close.
type RawBytes []byte
var errNilPtr = errors.New("destination pointer is nil") // embedded in descriptive error
// ConvertAssign ...
// convertAssign copies to dest the value in src, converting it if possible.
// An error is returned if the copy would result in loss of information.
// dest should be a pointer type.
func ConvertAssign(dest, src any) error {
// Common cases, without reflect.
switch s := src.(type) {
case string:
switch d := dest.(type) {
case *string:
if d == nil {
return errNilPtr
}
*d = s
return nil
case *[]byte:
if d == nil {
return errNilPtr
}
*d = []byte(s)
return nil
case *RawBytes:
if d == nil {
return errNilPtr
}
*d = append((*d)[:0], s...)
return nil
}
case []byte:
switch d := dest.(type) {
case *string:
if d == nil {
return errNilPtr
}
*d = string(s)
return nil
case *any:
if d == nil {
return errNilPtr
}
*d = cloneBytes(s)
return nil
case *[]byte:
if d == nil {
return errNilPtr
}
*d = cloneBytes(s)
return nil
case *RawBytes:
if d == nil {
return errNilPtr
}
*d = s
return nil
}
case time.Time:
switch d := dest.(type) {
case *time.Time:
*d = s
return nil
case *string:
*d = s.Format(time.RFC3339Nano)
return nil
case *[]byte:
if d == nil {
return errNilPtr
}
*d = []byte(s.Format(time.RFC3339Nano))
return nil
case *RawBytes:
if d == nil {
return errNilPtr
}
*d = s.AppendFormat((*d)[:0], time.RFC3339Nano)
return nil
}
case nil:
switch d := dest.(type) {
case *any:
if d == nil {
return errNilPtr
}
*d = nil
return nil
case *[]byte:
if d == nil {
return errNilPtr
}
*d = nil
return nil
case *RawBytes:
if d == nil {
return errNilPtr
}
*d = nil
return nil
}
}
var sv reflect.Value
switch d := dest.(type) {
case *string:
sv = reflect.ValueOf(src)
switch sv.Kind() {
case reflect.Bool,
reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64,
reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64,
reflect.Float32, reflect.Float64:
*d = asString(src)
return nil
}
case *[]byte:
sv = reflect.ValueOf(src)
if b, ok := asBytes(nil, sv); ok {
*d = b
return nil
}
case *RawBytes:
sv = reflect.ValueOf(src)
if b, ok := asBytes([]byte(*d)[:0], sv); ok {
*d = RawBytes(b)
return nil
}
case *bool:
bv, err := Bool.ConvertValue(src)
if err == nil {
*d = bv.(bool)
}
return err
case *any:
*d = src
return nil
}
if scanner, ok := dest.(Scanner); ok {
return scanner.Scan(src)
}
dpv := reflect.ValueOf(dest)
if dpv.Kind() != reflect.Ptr {
return errors.New("destination not a pointer")
}
if dpv.IsNil() {
return errNilPtr
}
if !sv.IsValid() {
sv = reflect.ValueOf(src)
}
dv := reflect.Indirect(dpv)
if sv.IsValid() && sv.Type().AssignableTo(dv.Type()) {
switch b := src.(type) {
case []byte:
dv.Set(reflect.ValueOf(cloneBytes(b)))
default:
dv.Set(sv)
}
return nil
}
if dv.Kind() == sv.Kind() && sv.Type().ConvertibleTo(dv.Type()) {
dv.Set(sv.Convert(dv.Type()))
return nil
}
// The following conversions use a string value as an intermediate representation
// to convert between various numeric types.
//
// This also allows scanning into user defined types such as "type Int int64".
// For symmetry, also check for string destination types.
switch dv.Kind() {
case reflect.Ptr:
if src == nil {
dv.Set(reflect.Zero(dv.Type()))
return nil
}
dv.Set(reflect.New(dv.Type().Elem()))
return ConvertAssign(dv.Interface(), src)
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
s := asString(src)
i64, err := strconv.ParseInt(s, 10, dv.Type().Bits())
if err != nil {
err = strconvErr(err)
return fmt.Errorf("converting driver.Value type %T (%q) to a %s: %v", src, s, dv.Kind(), err)
}
dv.SetInt(i64)
return nil
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
s := asString(src)
u64, err := strconv.ParseUint(s, 10, dv.Type().Bits())
if err != nil {
err = strconvErr(err)
return fmt.Errorf("converting driver.Value type %T (%q) to a %s: %v", src, s, dv.Kind(), err)
}
dv.SetUint(u64)
return nil
case reflect.Float32, reflect.Float64:
s := asString(src)
f64, err := strconv.ParseFloat(s, dv.Type().Bits())
if err != nil {
err = strconvErr(err)
return fmt.Errorf("converting driver.Value type %T (%q) to a %s: %v", src, s, dv.Kind(), err)
}
dv.SetFloat(f64)
return nil
case reflect.String:
switch v := src.(type) {
case string:
dv.SetString(v)
return nil
case []byte:
dv.SetString(string(v))
return nil
}
}
return fmt.Errorf("unsupported Scan, storing driver.Value type %T into type %T", src, dest)
}
func strconvErr(err error) error {
if ne, ok := err.(*strconv.NumError); ok {
return ne.Err
}
return err
}
func cloneBytes(b []byte) []byte {
if b == nil {
return nil
}
c := make([]byte, len(b))
copy(c, b)
return c
}
func ToString(src any) string {
return asString(src)
}
func asString(src any) string {
switch v := src.(type) {
case string:
return v
case []byte:
return string(v)
}
rv := reflect.ValueOf(src)
switch rv.Kind() {
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
return strconv.FormatInt(rv.Int(), 10)
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
return strconv.FormatUint(rv.Uint(), 10)
case reflect.Float64:
return strconv.FormatFloat(rv.Float(), 'g', -1, 64)
case reflect.Float32:
return strconv.FormatFloat(rv.Float(), 'g', -1, 32)
case reflect.Bool:
return strconv.FormatBool(rv.Bool())
}
return fmt.Sprintf("%v", src)
}
func asBytes(buf []byte, rv reflect.Value) (b []byte, ok bool) {
switch rv.Kind() {
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
return strconv.AppendInt(buf, rv.Int(), 10), true
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
return strconv.AppendUint(buf, rv.Uint(), 10), true
case reflect.Float32:
return strconv.AppendFloat(buf, rv.Float(), 'g', -1, 32), true
case reflect.Float64:
return strconv.AppendFloat(buf, rv.Float(), 'g', -1, 64), true
case reflect.Bool:
return strconv.AppendBool(buf, rv.Bool()), true
case reflect.String:
s := rv.String()
return append(buf, s...), true
}
return
}
// Value is a value that drivers must be able to handle.
// It is either nil, a type handled by a database driver's NamedValueChecker
// interface, or an instance of one of these types:
//
// int64
// float64
// bool
// []byte
// string
// time.Time
type Value any
type boolType struct{}
var Bool boolType
func (boolType) String() string { return "Bool" }
func (boolType) ConvertValue(src any) (Value, error) {
switch s := src.(type) {
case bool:
return s, nil
case string:
b, err := strconv.ParseBool(s)
if err != nil {
return nil, fmt.Errorf("sql/driver: couldn't convert %q into type bool", s)
}
return b, nil
case []byte:
b, err := strconv.ParseBool(string(s))
if err != nil {
return nil, fmt.Errorf("sql/driver: couldn't convert %q into type bool", s)
}
return b, nil
}
sv := reflect.ValueOf(src)
switch sv.Kind() {
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
iv := sv.Int()
if iv == 1 || iv == 0 {
return iv == 1, nil
}
return nil, fmt.Errorf("sql/driver: couldn't convert %d into type bool", iv)
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
uv := sv.Uint()
if uv == 1 || uv == 0 {
return uv == 1, nil
}
return nil, fmt.Errorf("sql/driver: couldn't convert %d into type bool", uv)
}
return nil, fmt.Errorf("sql/driver: couldn't convert %v (%T) into type bool", src, src)
}
type Scanner interface {
// Scan assigns a value from a database driver.
//
// The src value will be of one of the following types:
//
// int64
// float64
// bool
// []byte
// string
// time.Time
// nil - for NULL values
//
// An error should be returned if the value cannot be stored
// without loss of information.
//
// Reference types such as []byte are only valid until the next call to Scan
// and should not be retained. Their underlying memory is owned by the driver.
// If retention is necessary, copy their values before the next call to Scan.
Scan(src any) error
}