scanner

Documentation

Overview

Example (CreateArrayScanner)

var ints [3]int
c := NewCreator()
scan, err := c.createArrayScanner(reflect.TypeOf(ints))

if err != nil {
	panic(err)
}

if err = scan(unsafe.Pointer(&ints), "123,456,789,999,,,,"); err != nil {
	panic(err)
}

fmt.Println("values:", ints)

Output:

values: [123 456 789]

Example (CreatePointerScanner)

var foo *int

c := NewCreator()
scan, err := c.createPointerScanner(reflect.TypeOf(foo))

if err != nil {
	panic(err)
}

// Pointer to a pointer
if err = scan(unsafe.Pointer(&foo), "123"); err != nil {
	panic(err)
}

fmt.Println(*foo)

// Pointer to a pointer
if err = scan(unsafe.Pointer(&foo), "456"); err != nil {
	panic(err)
}

fmt.Println(*foo)

Output:


123
456

Example (CreateSliceScanner)

var ints []int

c := NewCreator()
scan, err := c.createSliceScanner(reflect.TypeOf(ints))

if err != nil {
	panic(err)
}

if err = scan(unsafe.Pointer(&ints), "123,456,789"); err != nil {
	panic(err)
}

fmt.Println("cap:", cap(ints))
fmt.Println("len:", len(ints))
fmt.Println("values:", ints)

Output:


cap: 3
len: 3
values: [123 456 789]

Index

• func GetScanner[T any](dst *T) (scan func(*T, string) error, err error)
• func ScanBytes[T any](dst *T, src []byte) (err error)
• func ScanString[T any](dst *T, src string) (err error)
• type Creator
  • func NewCreator(custom ...func(typ reflect.Type) (Scanner, error)) Creator
  • func (c Creator) CreateScanner(typ reflect.Type) (scan Scanner, err error)
• type Scanner
  • func CreateScanner(typ reflect.Type) (scan Scanner, err error)

Examples

• Package (CreateArrayScanner)
• Package (CreatePointerScanner)
• Package (CreateSliceScanner)

Functions

func GetScanner

func GetScanner[T any](dst *T) (scan func(*T, string) error, err error)

func ScanBytes

func ScanBytes[T any](dst *T, src []byte) (err error)

func ScanString

func ScanString[T any](dst *T, src string) (err error)

Types

type Creator

type Creator struct {
	// contains filtered or unexported fields
}

func NewCreator

func NewCreator(custom ...func(typ reflect.Type) (Scanner, error)) Creator

func (Creator) CreateScanner

func (c Creator) CreateScanner(typ reflect.Type) (scan Scanner, err error)

type Scanner

type Scanner func(unsafe.Pointer, string) error

func CreateScanner

func CreateScanner(typ reflect.Type) (scan Scanner, err error)