paramutil

func AddrIfPresent ¶

func AddrIfPresent[T comparable](v param.Opt[T]) *T

func IsNullPtr ¶

func IsNullPtr[T any](ptr *T) bool

IsNullPtr returns true if the pointer was created by NullPtr.

func IsNullSlice ¶

func IsNullSlice[T any](slice []T) bool

IsNullSlice returns true if the slice was created by NullSlice.

func NullPtr ¶

func NullPtr[T any]() *T

NullPtr returns a pointer to the zero value of the type T. When used with [MarshalObject] or [MarshalUnion], it will be marshaled as null.

It is unspecified behavior to mutate the value pointed to by the returned pointer.

func NullSlice ¶

func NullSlice[T any]() []T

NullSlice returns a non-nil slice with a length of 0. When used with [MarshalObject] or [MarshalUnion], it will be marshaled as null.

It is undefined behavior to mutate the slice returned by NullSlice.

func ToOpt ¶

func ToOpt[T comparable](v T, meta respjson.Field) param.Opt[T]

func Valid ¶

func Valid(v param.ParamStruct) bool

Checks if the value is not omitted and not null

func VariantFromUnion ¶

func VariantFromUnion(u reflect.Value) (any, error)

VariantFromUnion can be used to extract the present variant from a param union type. A param union type is a struct with an embedded field of [APIUnion].