optionutil

func Append ¶

func Append[T any](ctx options.Context, values ...T) options.Context

Append appends values to a slice using an implicit key.

func Apply ¶

func Apply[T any](cfg *T, opts ...options.Option) options.Context

Apply applies a series of options.Option to a given configuration object.

func ApplyContext ¶

func ApplyContext(ctx context.Context, opts ...options.Option) context.Context

ApplyContext applies a series of options.Option to a standard context.Context. Optimized: Uses ctxValue to bridge the two context worlds without overhead.

func Context ¶

func Context(ctx context.Context) options.Context

Context creates an options.Context instance with context.Context

func Default ¶

func Default() options.Context

Default creates a default options.Context instance.

func Empty ¶

func Empty() options.Context

Empty creates an empty options.Context instance.

func FromContext ¶

func FromContext(ctx context.Context) []options.Option

FromContext retrieves options from the standard context.

func New ¶

func New[T any](opts ...options.Option) (options.Context, *T)

New creates a new instance of T, applies options, and returns both the final context and the configured instance.

func NewContext ¶

func NewContext[T any](opts ...options.Option) options.Context

NewContext creates a new instance of T, applies options, and returns the resulting context.

func NewT ¶

func NewT[T any](opts ...options.Option) *T

NewT creates a new instance of T, applies options, and returns the configured instance.

func Slice ¶

func Slice[T any](ctx options.Context) []T

Slice retrieves a slice using an implicit key.

func SliceCond ¶

func SliceCond[T any](ctx options.Context, condition func([]T) bool) []T

func SliceOr ¶

func SliceOr[T any](ctx options.Context, defaultValue []T) []T

SliceOr retrieves a slice, or a default if not found.

func Update ¶

func Update[T any](updaters ...func(*T)) options.Option

Update returns an options.Option that modifies a configuration struct *T using an implicit key.

func Value ¶

func Value[T any](ctx options.Context) (T, bool)

Value retrieves a value using an implicit key.

func ValueCond ¶

func ValueCond[T any](ctx options.Context, condition func(T) bool, defaultValue T) T

ValueCond retrieves a value if the condition is true, or a default otherwise.

func ValueOr ¶

func ValueOr[T any](ctx options.Context, defaultValue T) T

ValueOr retrieves a value, or a default if not found.

func WithCond ¶

func WithCond(condition bool, opt options.Option) options.Option

WithCond returns an options.Option that applies the given options.Option if the condition is true.

func WithContext ¶

func WithContext(ctx options.Context) options.Option

WithContext returns an options.Option that sets the given options.Context as the current context.

func WithGroup ¶

func WithGroup(opts ...options.Option) options.Option

WithGroup returns an options.Option that applies a group of options.Option to the context.

func WithOption ¶

func WithOption(ctx context.Context, opts ...options.Option) context.Context

WithOption adds options to the standard context. Optimized: Directly uses the identity storage of context.Context.

func WithValue ¶

func WithValue[T any](ctx options.Context, value T) options.Context

WithValue sets a value using an implicit key.