29 lines
698 B
Go
29 lines
698 B
Go
// Package gg implements simple "extensions" to Go language. Based on https://github.com/icza/gog
|
|
package gg
|
|
|
|
// If returns v if it is a non-zero value, orElse otherwise.
|
|
//
|
|
// This is similar to elvis operator (?:) in Groovy and other languages.
|
|
// Note: Different from the real elvis operator, the orElse expression will always get evaluated.
|
|
func If[T comparable](v T, orElse T) T {
|
|
var zero T
|
|
if v != zero {
|
|
return v
|
|
}
|
|
return orElse
|
|
}
|
|
|
|
// P returns a pointer to the input value
|
|
func P[T any](v T) *T {
|
|
return &v
|
|
}
|
|
|
|
// V returns the value of the input pointer, or a zero value if the input pointer is nil.
|
|
func V[T any](p *T) T {
|
|
if p == nil {
|
|
var zero T
|
|
return zero
|
|
}
|
|
return *p
|
|
}
|