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maybe.go
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maybe.go
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package fpgo
import (
"errors"
"fmt"
"math"
"reflect"
"strconv"
)
var (
// ErrConversionUnsupported Conversion Unsupported
ErrConversionUnsupported = errors.New("unsupported")
// ErrConversionNil Conversion Nil
ErrConversionNil = errors.New("<nil>")
// ErrConversionNil Conversion Size Overflow
ErrConversionSizeOverflow = errors.New("size overflow")
)
// Maybe
// MaybeDef Maybe inspired by Rx/Optional/Guava/Haskell
type MaybeDef[T any] interface {
Just(in interface{}) MaybeDef[interface{}]
Or(or T) T
Clone() MaybeDef[T]
FlatMap(fn func(T) MaybeDef[T]) MaybeDef[T]
ToString() string
ToPtr() *T
ToMaybe() MaybeDef[T]
ToFloat64() (float64, error)
ToFloat32() (float32, error)
ToInt() (int, error)
ToInt32() (int32, error)
ToInt64() (int64, error)
ToBool() (bool, error)
Let(fn func())
Unwrap() T
UnwrapInterface() interface{}
IsPresent() bool
IsNil() bool
IsValid() bool
IsPtr() bool
Type() reflect.Type
Kind() reflect.Kind
IsType(t reflect.Type) bool
IsKind(t reflect.Kind) bool
}
// someDef Maybe inspired by Rx/Optional/Guava/Haskell
type someDef[T any] struct {
ref T
isNil bool
isPresent bool
}
// Just New Maybe by a given value
func (maybeSelf someDef[T]) Just(in interface{}) MaybeDef[interface{}] {
if IsNil(in) {
return None
}
return JustGenerics(in)
}
// JustGenerics New Maybe by a given value
func JustGenerics[T any](in T) MaybeDef[T] {
isNil := IsNil(in)
return someDef[T]{ref: in, isNil: isNil, isPresent: !isNil}
}
// Or Check the value wrapped by Maybe, if it's nil then return a given fallback value
func (maybeSelf someDef[T]) Or(or T) T {
if maybeSelf.IsNil() {
return or
}
return maybeSelf.ref
}
// CloneTo Clone the Ptr target to an another Ptr target
func CloneTo[T any](maybeSelf MaybeDef[T], dest T) MaybeDef[T] {
if maybeSelf.IsNil() {
// return JustGenerics(nil)
return JustGenerics(maybeSelf.Unwrap())
}
x := reflect.ValueOf(maybeSelf.Unwrap())
if x.Kind() == reflect.Ptr {
starX := x.Elem()
y := reflect.New(starX.Type())
starY := y.Elem()
starY.Set(starX)
reflect.ValueOf(dest).Elem().Set(y.Elem())
return JustGenerics(dest)
}
dest = x.Interface().(T)
return JustGenerics(dest)
}
// Clone Clone Maybe object & its wrapped value
func (maybeSelf someDef[T]) Clone() MaybeDef[T] {
return CloneTo[T](maybeSelf, *new(T))
}
// FlatMap FlatMap Maybe by function
func (maybeSelf someDef[T]) FlatMap(fn func(T) MaybeDef[T]) MaybeDef[T] {
return fn(maybeSelf.ref)
}
// ToString Maybe to String
func (maybeSelf someDef[T]) ToString() string {
if maybeSelf.IsNil() {
return "<nil>"
}
var ref interface{} = maybeSelf.ref
switch (ref).(type) {
default:
return fmt.Sprintf("%v", ref)
case int:
return strconv.Itoa((ref).(int))
case string:
return (ref).(string)
}
}
// ToPtr Maybe to Ptr
func (maybeSelf someDef[T]) ToPtr() *T {
if maybeSelf.IsPtr() {
val := reflect.Indirect(reflect.ValueOf(maybeSelf.ref)).Interface()
switch val.(type) {
case *T:
return val.(*T)
case T:
result := val.(T)
return &result
}
}
return &maybeSelf.ref
}
// ToMaybe Maybe to Maybe
func (maybeSelf someDef[T]) ToMaybe() MaybeDef[T] {
if maybeSelf.IsNil() {
return maybeSelf
}
var ref interface{} = maybeSelf.ref
switch (ref).(type) {
default:
return maybeSelf
case someDef[T]:
return (ref).(someDef[T])
}
}
// ToFloat64 Maybe to Float64
func (maybeSelf someDef[T]) ToFloat64() (float64, error) {
if maybeSelf.IsNil() {
return 0, ErrConversionNil
}
var ref interface{} = maybeSelf.ref
switch (ref).(type) {
default:
return float64(0), ErrConversionUnsupported
case string:
return strconv.ParseFloat(maybeSelf.ToString(), 64)
case bool:
val, err := maybeSelf.ToBool()
if val {
return float64(1), err
}
return float64(0), err
case uint:
val, err := maybeSelf.ToUint()
return float64(val), err
case uint16:
val, err := maybeSelf.ToUint16()
return float64(val), err
case uint32:
val, err := maybeSelf.ToUint32()
return float64(val), err
case uint64:
val, err := maybeSelf.ToUint64()
return float64(val), err
case uintptr:
val, err := maybeSelf.ToUintptr()
return float64(val), err
case byte:
val, err := maybeSelf.ToByte()
return float64(val), err
case int:
val, err := maybeSelf.ToInt()
return float64(val), err
case int8:
val, err := maybeSelf.ToInt8()
return float64(val), err
case int16:
val, err := maybeSelf.ToInt16()
return float64(val), err
case int32:
val, err := maybeSelf.ToInt32()
return float64(val), err
case int64:
val, err := maybeSelf.ToInt64()
return float64(val), err
case float32:
val, err := maybeSelf.ToFloat32()
return float64(val), err
case float64:
return (ref).(float64), nil
}
}
// ToFloat32 Maybe to Float32
func (maybeSelf someDef[T]) ToFloat32() (float32, error) {
if maybeSelf.IsNil() {
return 0, ErrConversionNil
}
var ref interface{} = maybeSelf.ref
switch (ref).(type) {
default:
return float32(0), ErrConversionUnsupported
case string:
val, err := strconv.ParseFloat(maybeSelf.ToString(), 32)
return float32(val), err
case bool:
val, err := maybeSelf.ToBool()
if val {
return float32(1), err
}
return float32(0), err
case uint:
val, err := maybeSelf.ToUint()
return float32(val), err
case uint16:
val, err := maybeSelf.ToUint16()
return float32(val), err
case uint32:
val, err := maybeSelf.ToUint32()
return float32(val), err
case uint64:
val, err := maybeSelf.ToUint64()
return float32(val), err
case uintptr:
val, err := maybeSelf.ToUintptr()
return float32(val), err
case byte:
val, err := maybeSelf.ToByte()
return float32(val), err
case int:
val, err := maybeSelf.ToInt()
return float32(val), err
case int8:
val, err := maybeSelf.ToInt8()
return float32(val), err
case int16:
val, err := maybeSelf.ToInt16()
return float32(val), err
case int32:
val, err := maybeSelf.ToInt32()
return float32(val), err
case int64:
val, err := maybeSelf.ToInt64()
return float32(val), err
case float32:
return (ref).(float32), nil
case float64:
val, err := maybeSelf.ToFloat64()
return float32(val), err
}
}
// ToInt Maybe to Int
func (maybeSelf someDef[T]) ToInt() (int, error) {
if maybeSelf.IsNil() {
return 0, ErrConversionNil
}
var ref interface{} = maybeSelf.ref
switch (ref).(type) {
default:
return 0, ErrConversionUnsupported
case string:
return strconv.Atoi(maybeSelf.ToString())
case bool:
val, err := maybeSelf.ToBool()
if val {
return 1, err
}
return 0, err
case uint:
val, err := maybeSelf.ToUint()
if val <= math.MaxInt32 {
return int(val), err
}
return 0, ErrConversionSizeOverflow
case uint16:
val, err := maybeSelf.ToUint16()
return int(val), err
case uint32:
val, err := maybeSelf.ToUint32()
if val <= math.MaxInt32 {
return int(val), err
}
return 0, ErrConversionSizeOverflow
case uint64:
val, err := maybeSelf.ToUint64()
if val <= math.MaxInt32 {
return int(val), err
}
return 0, ErrConversionSizeOverflow
case uintptr:
val, err := maybeSelf.ToUintptr()
if val <= math.MaxInt32 {
return int(val), err
}
return 0, ErrConversionSizeOverflow
case byte:
val, err := maybeSelf.ToByte()
return int(val), err
case int:
return (ref).(int), nil
case int8:
val, err := maybeSelf.ToInt8()
return int(val), err
case int16:
val, err := maybeSelf.ToInt16()
return int(val), err
case int32:
val, err := maybeSelf.ToInt32()
if val >= math.MinInt32 && val <= math.MaxInt32 {
return int(val), err
}
return 0, ErrConversionSizeOverflow
case int64:
val, err := maybeSelf.ToInt64()
if val >= math.MinInt32 && val <= math.MaxInt32 {
return int(val), err
}
return 0, ErrConversionSizeOverflow
case float32:
val, err := maybeSelf.ToFloat32()
if val >= math.MinInt32 && val <= math.MaxInt32 {
return int(math.Round(float64(val))), err
}
return 0, ErrConversionSizeOverflow
case float64:
val, err := maybeSelf.ToFloat64()
if val >= math.MinInt32 && val <= math.MaxInt32 {
return int(math.Round(val)), err
}
return 0, ErrConversionSizeOverflow
}
}
// ToInt8 Maybe to Int8
func (maybeSelf someDef[T]) ToInt8() (int8, error) {
if maybeSelf.IsNil() {
return 0, ErrConversionNil
}
var ref interface{} = maybeSelf.ref
switch (ref).(type) {
default:
return int8(0), ErrConversionUnsupported
case string:
parseInt, err := strconv.ParseInt((ref).(string), 10, 8)
return int8(parseInt), err
case bool:
val, err := maybeSelf.ToBool()
if val {
return int8(1), err
}
return int8(0), err
case uint:
val, err := maybeSelf.ToUint()
if val <= math.MaxInt8 {
return int8(val), err
}
return 0, ErrConversionSizeOverflow
case uint16:
val, err := maybeSelf.ToUint16()
if val <= math.MaxInt8 {
return int8(val), err
}
return 0, ErrConversionSizeOverflow
case uint32:
val, err := maybeSelf.ToUint32()
if val <= math.MaxInt8 {
return int8(val), err
}
return 0, ErrConversionSizeOverflow
case uint64:
val, err := maybeSelf.ToUint64()
if val <= math.MaxInt8 {
return int8(val), err
}
return 0, ErrConversionSizeOverflow
case uintptr:
val, err := maybeSelf.ToUintptr()
if val <= math.MaxInt8 {
return int8(val), err
}
return 0, ErrConversionSizeOverflow
case byte:
val, err := maybeSelf.ToByte()
if val <= math.MaxInt8 {
return int8(val), err
}
return 0, ErrConversionSizeOverflow
case int:
val, err := maybeSelf.ToInt()
if val >= math.MinInt8 && val <= math.MaxInt8 {
return int8(val), err
}
return 0, ErrConversionSizeOverflow
case int8:
return (ref).(int8), nil
case int16:
val, err := maybeSelf.ToInt16()
if val >= math.MinInt8 && val <= math.MaxInt8 {
return int8(val), err
}
return 0, ErrConversionSizeOverflow
case int32:
val, err := maybeSelf.ToInt32()
if val >= math.MinInt8 && val <= math.MaxInt8 {
return int8(val), err
}
return 0, ErrConversionSizeOverflow
case int64:
val, err := maybeSelf.ToInt64()
if val >= math.MinInt8 && val <= math.MaxInt8 {
return int8(val), err
}
return 0, ErrConversionSizeOverflow
case float32:
val, err := maybeSelf.ToFloat32()
if val >= math.MinInt8 && val <= math.MaxInt8 {
return int8(math.Round(float64(val))), err
}
return 0, ErrConversionSizeOverflow
case float64:
val, err := maybeSelf.ToFloat64()
if val >= math.MinInt8 && val <= math.MaxInt8 {
return int8(math.Round(val)), err
}
return 0, ErrConversionSizeOverflow
}
}
// ToInt16 Maybe to Int16
func (maybeSelf someDef[T]) ToInt16() (int16, error) {
if maybeSelf.IsNil() {
return 0, ErrConversionNil
}
var ref interface{} = maybeSelf.ref
switch (ref).(type) {
default:
return int16(0), ErrConversionUnsupported
case string:
parseInt, err := strconv.ParseInt((ref).(string), 10, 16)
return int16(parseInt), err
case bool:
val, err := maybeSelf.ToBool()
if val {
return int16(1), err
}
return int16(0), err
case uint:
val, err := maybeSelf.ToUint()
if val <= math.MaxInt16 {
return int16(val), err
}
return 0, ErrConversionSizeOverflow
case uint16:
val, err := maybeSelf.ToUint16()
if val <= math.MaxInt16 {
return int16(val), err
}
return 0, ErrConversionSizeOverflow
case uint32:
val, err := maybeSelf.ToUint32()
if val <= math.MaxInt16 {
return int16(val), err
}
return 0, ErrConversionSizeOverflow
case uint64:
val, err := maybeSelf.ToUint64()
if val <= math.MaxInt16 {
return int16(val), err
}
return 0, ErrConversionSizeOverflow
case uintptr:
val, err := maybeSelf.ToUintptr()
if val <= math.MaxInt16 {
return int16(val), err
}
return 0, ErrConversionSizeOverflow
case byte:
val, err := maybeSelf.ToByte()
return int16(val), err
case int:
val, err := maybeSelf.ToInt()
if val >= math.MinInt16 && val <= math.MaxInt16 {
return int16(val), err
}
return 0, ErrConversionSizeOverflow
case int8:
val, err := maybeSelf.ToInt8()
return int16(val), err
case int16:
return (ref).(int16), nil
case int32:
val, err := maybeSelf.ToInt32()
if val >= math.MinInt16 && val <= math.MaxInt16 {
return int16(val), err
}
return 0, ErrConversionSizeOverflow
case int64:
val, err := maybeSelf.ToInt64()
if val >= math.MinInt16 && val <= math.MaxInt16 {
return int16(val), err
}
return 0, ErrConversionSizeOverflow
case float32:
val, err := maybeSelf.ToFloat32()
if val >= math.MinInt16 && val <= math.MaxInt16 {
return int16(math.Round(float64(val))), err
}
return 0, ErrConversionSizeOverflow
case float64:
val, err := maybeSelf.ToFloat64()
if val >= math.MinInt16 && val <= math.MaxInt16 {
return int16(math.Round(val)), err
}
return 0, ErrConversionSizeOverflow
}
}
// ToInt32 Maybe to Int32
func (maybeSelf someDef[T]) ToInt32() (int32, error) {
if maybeSelf.IsNil() {
return 0, ErrConversionNil
}
var ref interface{} = maybeSelf.ref
switch (ref).(type) {
default:
return int32(0), ErrConversionUnsupported
case string:
parseInt, err := strconv.ParseInt((ref).(string), 10, 32)
return int32(parseInt), err
case bool:
val, err := maybeSelf.ToBool()
if val {
return int32(1), err
}
return int32(0), err
case uint:
val, err := maybeSelf.ToUint()
if val <= math.MaxInt32 {
return int32(val), err
}
return 0, ErrConversionSizeOverflow
case uint16:
val, err := maybeSelf.ToUint16()
return int32(val), err
case uint32:
val, err := maybeSelf.ToUint32()
if val <= math.MaxInt32 {
return int32(val), err
}
return 0, ErrConversionSizeOverflow
case uint64:
val, err := maybeSelf.ToUint64()
if val <= math.MaxInt32 {
return int32(val), err
}
return 0, ErrConversionSizeOverflow
case uintptr:
val, err := maybeSelf.ToUintptr()
if val <= math.MaxInt32 {
return int32(val), err
}
return 0, ErrConversionSizeOverflow
case byte:
val, err := maybeSelf.ToByte()
return int32(val), err
case int:
val, err := maybeSelf.ToInt()
if val >= math.MinInt32 && val <= math.MaxInt32 {
return int32(val), err
}
return 0, ErrConversionSizeOverflow
case int8:
val, err := maybeSelf.ToInt8()
return int32(val), err
case int16:
val, err := maybeSelf.ToInt16()
return int32(val), err
case int32:
return (ref).(int32), nil
case int64:
val, err := maybeSelf.ToInt64()
if val >= math.MinInt32 && val <= math.MaxInt32 {
return int32(val), err
}
return 0, ErrConversionSizeOverflow
case float32:
val, err := maybeSelf.ToFloat32()
if val >= math.MinInt32 && val <= math.MaxInt32 {
return int32(math.Round(float64(val))), err
}
return 0, ErrConversionSizeOverflow
case float64:
val, err := maybeSelf.ToFloat64()
return int32(math.Round(val)), err
}
}
// ToInt64 Maybe to Int64
func (maybeSelf someDef[T]) ToInt64() (int64, error) {
if maybeSelf.IsNil() {
return 0, ErrConversionNil
}
var ref interface{} = maybeSelf.ref
switch (ref).(type) {
default:
return int64(0), ErrConversionUnsupported
case string:
return strconv.ParseInt((ref).(string), 10, 64)
case bool:
val, err := maybeSelf.ToBool()
if val {
return int64(1), err
}
return int64(0), err
case uint:
val, err := maybeSelf.ToUint()
if val <= math.MaxInt64 {
return int64(val), err
}
return 0, ErrConversionSizeOverflow
case uint16:
val, err := maybeSelf.ToUint16()
return int64(val), err
case uint32:
val, err := maybeSelf.ToUint32()
return int64(val), err
case uint64:
val, err := maybeSelf.ToUint64()
if val <= math.MaxInt64 {
return int64(val), err
}
return 0, ErrConversionSizeOverflow
case uintptr:
val, err := maybeSelf.ToUintptr()
if val <= math.MaxInt64 {
return int64(val), err
}
return 0, ErrConversionSizeOverflow
case byte:
val, err := maybeSelf.ToByte()
return int64(val), err
case int:
val, err := maybeSelf.ToInt()
return int64(val), err
case int8:
val, err := maybeSelf.ToInt8()
return int64(val), err
case int16:
val, err := maybeSelf.ToInt16()
return int64(val), err
case int32:
val, err := maybeSelf.ToInt32()
return int64(val), err
case int64:
return (ref).(int64), nil
case float32:
val, err := maybeSelf.ToFloat32()
if val >= math.MinInt64 && val <= math.MaxInt64 {
return int64(math.Round(float64(val))), err
}
return 0, ErrConversionSizeOverflow
case float64:
val, err := maybeSelf.ToFloat64()
if val >= math.MinInt64 && val <= math.MaxInt64 {
return int64(math.Round(val)), err
}
return 0, ErrConversionSizeOverflow
}
}
// ToByte Maybe to Byte
func (maybeSelf someDef[T]) ToByte() (byte, error) {
if maybeSelf.IsNil() {
return 0, ErrConversionNil
}
var ref interface{} = maybeSelf.ref
switch (ref).(type) {
default:
return uint8(0), ErrConversionUnsupported
case string:
parseInt, err := strconv.ParseInt((ref).(string), 10, 8)
return uint8(parseInt), err
case bool:
val, err := maybeSelf.ToBool()
if val {
return uint8(1), err
}
return uint8(0), err
case uint:
val, err := maybeSelf.ToUint()
if val >= 0 && val <= math.MaxUint8 {
return uint8(val), err
}
return 0, ErrConversionSizeOverflow
case uint16:
val, err := maybeSelf.ToUint16()
if val >= 0 && val <= math.MaxUint8 {
return uint8(val), err
}
return 0, ErrConversionSizeOverflow
case uint32:
val, err := maybeSelf.ToUint32()
if val >= 0 && val <= math.MaxUint8 {
return uint8(val), err
}
return 0, ErrConversionSizeOverflow
case uint64:
val, err := maybeSelf.ToUint64()
if val >= 0 && val <= math.MaxUint8 {
return uint8(val), err
}
return 0, ErrConversionSizeOverflow
case uintptr:
val, err := maybeSelf.ToUintptr()
if val >= 0 && val <= math.MaxUint8 {
return uint8(val), err
}
return 0, ErrConversionSizeOverflow
case byte:
return ref.(byte), nil
case int:
val, err := maybeSelf.ToInt()
if val >= 0 && val <= math.MaxUint8 {
return uint8(val), err
}
return 0, ErrConversionSizeOverflow
case int8:
val, err := maybeSelf.ToInt8()
return uint8(val), err
case int16:
val, err := maybeSelf.ToInt16()
if val >= 0 && val <= math.MaxUint8 {
return uint8(val), err
}
return 0, ErrConversionSizeOverflow
case int32:
val, err := maybeSelf.ToInt32()
if val >= 0 && val <= math.MaxUint8 {
return uint8(val), err
}
return 0, ErrConversionSizeOverflow
case int64:
val, err := maybeSelf.ToInt64()
if val >= 0 && val <= math.MaxUint8 {
return uint8(val), err
}
return 0, ErrConversionSizeOverflow
case float32:
val, err := maybeSelf.ToFloat32()
if val >= 0 && val <= math.MaxUint8 {
return uint8(math.Round(float64(val))), err
}
return 0, ErrConversionSizeOverflow
case float64:
val, err := maybeSelf.ToFloat64()
if val >= 0 && val <= math.MaxUint8 {
return uint8(math.Round(val)), err
}
return 0, ErrConversionSizeOverflow
}
}
// ToUint Maybe to Uint
func (maybeSelf someDef[T]) ToUint() (uint, error) {
if maybeSelf.IsNil() {
return 0, ErrConversionNil
}
var ref interface{} = maybeSelf.ref
switch (ref).(type) {
default:
return 0, ErrConversionUnsupported
case string:
parseInt, err := strconv.ParseInt((ref).(string), 10, 32)
return uint(parseInt), err
case bool:
val, err := maybeSelf.ToBool()
if val {
return 1, err
}
return 0, err
case uint:
return ref.(uint), nil
case uint16:
val, err := maybeSelf.ToUint16()
return uint(val), err
case uint32:
val, err := maybeSelf.ToUint32()
if val >= 0 && val <= math.MaxUint32 {
return uint(val), err
}
return 0, ErrConversionSizeOverflow
case uint64:
val, err := maybeSelf.ToUint64()
if val >= 0 && val <= math.MaxUint32 {
return uint(val), err
}
return 0, ErrConversionSizeOverflow
case uintptr:
val, err := maybeSelf.ToUintptr()
if val >= 0 && val <= math.MaxUint32 {
return uint(val), err
}
return 0, ErrConversionSizeOverflow
case byte:
val, err := maybeSelf.ToByte()
return uint(val), err
case int:
val, err := maybeSelf.ToInt()
return uint(val), err
case int8:
val, err := maybeSelf.ToInt8()
return uint(val), err
case int16:
val, err := maybeSelf.ToInt16()
return uint(val), err
case int32:
val, err := maybeSelf.ToInt32()
return uint(val), err
case int64:
val, err := maybeSelf.ToInt64()
if val >= 0 && val <= math.MaxUint32 {
return uint(val), err
}
return 0, ErrConversionSizeOverflow
case float32:
val, err := maybeSelf.ToFloat32()
if val >= 0 && val <= math.MaxUint32 {
return uint(math.Round(float64(val))), err
}
return 0, ErrConversionSizeOverflow
case float64:
val, err := maybeSelf.ToFloat64()
if val >= 0 && val <= math.MaxUint32 {
return uint(math.Round(val)), err
}
return 0, ErrConversionSizeOverflow
}
}
// ToUint8 Maybe to Uint8
func (maybeSelf someDef[T]) ToUint8() (uint8, error) {
return maybeSelf.ToByte()
}
// ToUint16 Maybe to Uint16
func (maybeSelf someDef[T]) ToUint16() (uint16, error) {
if maybeSelf.IsNil() {
return 0, ErrConversionNil
}
var ref interface{} = maybeSelf.ref
switch (ref).(type) {
default:
return uint16(0), ErrConversionUnsupported
case string:
parseInt, err := strconv.ParseInt((ref).(string), 10, 16)
return uint16(parseInt), err
case bool:
val, err := maybeSelf.ToBool()
if val {
return uint16(1), err
}
return uint16(0), err
case uint:
val, err := maybeSelf.ToUint()
if val >= 0 && val <= math.MaxUint16 {
return uint16(val), err
}
return 0, ErrConversionSizeOverflow
case uint16:
return (ref).(uint16), nil
case uint32:
val, err := maybeSelf.ToUint32()
if val >= 0 && val <= math.MaxUint16 {
return uint16(val), err
}
return 0, ErrConversionSizeOverflow
case uint64:
val, err := maybeSelf.ToUint64()
if val >= 0 && val <= math.MaxUint16 {
return uint16(val), err
}
return 0, ErrConversionSizeOverflow
case uintptr:
val, err := maybeSelf.ToUintptr()
if val >= 0 && val <= math.MaxUint16 {
return uint16(val), err
}
return 0, ErrConversionSizeOverflow
case byte:
val, err := maybeSelf.ToByte()
return uint16(val), err
case int:
val, err := maybeSelf.ToInt()
if val >= 0 && val <= math.MaxUint16 {
return uint16(val), err
}
return 0, ErrConversionSizeOverflow
case int8:
val, err := maybeSelf.ToInt8()
return uint16(val), err
case int16:
val, err := maybeSelf.ToInt32()
return uint16(val), err
case int32:
val, err := maybeSelf.ToInt32()
if val >= 0 && val <= math.MaxUint16 {
return uint16(val), err
}
return 0, ErrConversionSizeOverflow
case int64:
val, err := maybeSelf.ToInt64()
if val >= 0 && val <= math.MaxUint16 {
return uint16(val), err
}
return 0, ErrConversionSizeOverflow
case float32:
val, err := maybeSelf.ToFloat32()
if val >= 0 && val <= math.MaxUint16 {
return uint16(math.Round(float64(val))), err
}
return 0, ErrConversionSizeOverflow
case float64:
val, err := maybeSelf.ToFloat64()
if val >= 0 && val <= math.MaxUint16 {
return uint16(math.Round(val)), err
}
return 0, ErrConversionSizeOverflow
}
}
// ToUint32 Maybe to Uint32
func (maybeSelf someDef[T]) ToUint32() (uint32, error) {
if maybeSelf.IsNil() {
return 0, ErrConversionNil
}
var ref interface{} = maybeSelf.ref
switch (ref).(type) {
default:
return uint32(0), ErrConversionUnsupported
case string:
parseInt, err := strconv.ParseInt((ref).(string), 10, 32)
return uint32(parseInt), err
case bool:
val, err := maybeSelf.ToBool()
if val {
return uint32(1), err
}
return uint32(0), err
case uint:
val, err := maybeSelf.ToUint()
if val >= 0 && val <= math.MaxUint32 {
return uint32(val), err
}
return 0, ErrConversionSizeOverflow
case uint16:
val, err := maybeSelf.ToUint16()
return uint32(val), err
case uint32:
return ref.(uint32), nil
case uint64:
val, err := maybeSelf.ToUint64()
if val >= 0 && val <= math.MaxUint32 {
return uint32(val), err
}