Return pointer of basic type value.
package main
import "github.com/gochore/pt"
func main() {
// 💀 It cannot work because Go does not allow taking the address of a constant or literal.
f(&100)
// 😕 It works, but it requires two lines and declares a variable that could pollute the namespace.
v := 100
f(&v)
// 😊 It works. Only one line and no new variables.
// But you have to use different functions for different types.
// It's the only way to do it before Go1.18.
f(pt.Int(100))
// 🤩 It works. Only one line and no new variables, and a single function for all types.
// It's based on generics, so it requires Go1.18 and above.
f(pt.P(100))
}
func f(p *int) {
// 💀 It could panic if p is nil.
println(*p)
// 😕 It's safe, but it requires multiple lines and declares a variable that could pollute the namespace.
v := 0
if p != nil {
v = *p
}
println(v)
// 🤩 It's safe. Only one line and no new variables.
// It's based on generics, so it requires Go1.18 and above.
println(pt.V(p))
}func P[T any](v T) *TP returns pointer of v. It's a short form of "Pointer" or "GetPointer".
func V[T any](p *T) TV returns value of p. If p is nil, return zero value of T. It's a short form of "Value" or "GetValue".
func Bool(v bool) *boolBool returns pointer of bool
func Byte(v byte) *byteByte returns pointer of byte
func Complex128(v complex128) *complex128Complex128 returns pointer of complex128
func Complex64(v complex64) *complex64Complex64 returns pointer of complex64
func Duration(v time.Duration) *time.DurationDuration returns pointer of time.Duration
func Float32(v float32) *float32Float32 returns pointer of float32
func Float64(v float64) *float64Float64 returns pointer of float64
func Int(v int) *intInt returns pointer of int
func Int16(v int16) *int16Int16 returns pointer of int16
func Int32(v int32) *int32Int32 returns pointer of int32
func Int64(v int64) *int64Int64 returns pointer of int64
func Int8(v int8) *int8Int8 returns pointer of int8
func Rune(v rune) *runeRune returns pointer of rune
func String(v string) *stringString returns pointer of string
func Time(v time.Time) *time.TimeTime returns pointer of time.Time
func Uint(v uint) *uintUint returns pointer of uint
func Uint16(v uint16) *uint16Uint16 returns pointer of uint16
func Uint32(v uint32) *uint32Uint32 returns pointer of uint32
func Uint64(v uint64) *uint64Uint64 returns pointer of uint64
func Uint8(v uint8) *uint8Uint8 returns pointer of uint8
func Uintptr(v uintptr) *uintptrUintptr returns pointer of uintptr