goext/langext/pointer.go

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package langext
import (
"reflect"
)
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// PTrue := &true
var PTrue = Ptr(true)
// PFalse := &false
var PFalse = Ptr(false)
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// PNil := &nil
var PNil = Ptr[any](nil)
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func Ptr[T any](v T) *T {
return &v
}
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func DblPtr[T any](v T) **T {
v_ := &v
return &v_
}
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func DblPtrIfNotNil[T any](v *T) **T {
if v == nil {
return nil
}
return &v
}
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func DblPtrNil[T any]() **T {
var v *T = nil
return &v
}
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func ArrPtr[T any](v ...T) *[]T {
return &v
}
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func PtrInt32(v int32) *int32 {
return &v
}
func PtrInt64(v int64) *int64 {
return &v
}
func PtrFloat32(v float32) *float32 {
return &v
}
func PtrFloat64(v float64) *float64 {
return &v
}
func IsNil(i interface{}) bool {
if i == nil {
return true
}
switch reflect.TypeOf(i).Kind() {
case reflect.Ptr, reflect.Map, reflect.Chan, reflect.Slice, reflect.Func, reflect.UnsafePointer:
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return reflect.ValueOf(i).IsNil()
}
return false
}
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func PtrEquals[T comparable](v1 *T, v2 *T) bool {
return (v1 == nil && v2 == nil) || (v1 != nil && v2 != nil && *v1 == *v2)
}