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

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