|
|
|
|
@ -53,6 +53,8 @@ func SliceOfViews[T ViewCloner[T, V], V StructView[T]](x []T) SliceView[T, V] {
|
|
|
|
|
// SliceView is a read-only wrapper around a struct which should only be exposed
|
|
|
|
|
// as a View.
|
|
|
|
|
type SliceView[T ViewCloner[T, V], V StructView[T]] struct {
|
|
|
|
|
// ж is the underlying mutable value, named with a hard-to-type
|
|
|
|
|
// character that looks pointy like a pointer.
|
|
|
|
|
// It is named distinctively to make you think of how dangerous it is to escape
|
|
|
|
|
// to callers. You must not let callers be able to mutate it.
|
|
|
|
|
ж []T
|
|
|
|
|
@ -88,6 +90,8 @@ func (v SliceView[T, V]) AsSlice() []V {
|
|
|
|
|
|
|
|
|
|
// Slice is a read-only accessor for a slice.
|
|
|
|
|
type Slice[T any] struct {
|
|
|
|
|
// ж is the underlying mutable value, named with a hard-to-type
|
|
|
|
|
// character that looks pointy like a pointer.
|
|
|
|
|
// It is named distinctively to make you think of how dangerous it is to escape
|
|
|
|
|
// to callers. You must not let callers be able to mutate it.
|
|
|
|
|
ж []T
|
|
|
|
|
@ -181,3 +185,102 @@ func (v IPPrefixSlice) MarshalJSON() ([]byte, error) {
|
|
|
|
|
func (v *IPPrefixSlice) UnmarshalJSON(b []byte) error {
|
|
|
|
|
return v.ж.UnmarshalJSON(b)
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
// MapOf returns a read-only view over m.
|
|
|
|
|
func MapOf[K comparable, V comparable](m map[K]V) Map[K, V] {
|
|
|
|
|
return Map[K, V]{m}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
// Map is a read-only accessor over a map whose values are immutable.
|
|
|
|
|
type Map[K comparable, V any] struct {
|
|
|
|
|
// ж is the underlying mutable value, named with a hard-to-type
|
|
|
|
|
// character that looks pointy like a pointer.
|
|
|
|
|
// It is named distinctively to make you think of how dangerous it is to escape
|
|
|
|
|
// to callers. You must not let callers be able to mutate it.
|
|
|
|
|
ж map[K]V
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
// Has reports whether k has an entry in the map.
|
|
|
|
|
func (m Map[K, V]) Has(k K) bool {
|
|
|
|
|
_, ok := m.ж[k]
|
|
|
|
|
return ok
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
// IsNil reports whether the underlying map is nil.
|
|
|
|
|
func (m Map[K, V]) IsNil() bool {
|
|
|
|
|
return m.ж == nil
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
// Len returns the number of elements in the map.
|
|
|
|
|
func (m Map[K, V]) Len() int { return len(m.ж) }
|
|
|
|
|
|
|
|
|
|
// Get returns the element with key k.
|
|
|
|
|
func (m Map[K, V]) Get(k K) V {
|
|
|
|
|
return m.ж[k]
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
// GetOk returns the element with key k and a bool representing whether the key
|
|
|
|
|
// is in map.
|
|
|
|
|
func (m Map[K, V]) GetOk(k K) (V, bool) {
|
|
|
|
|
v, ok := m.ж[k]
|
|
|
|
|
return v, ok
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
// ForEach calls f for every k,v pair in the underlying map.
|
|
|
|
|
func (m Map[K, V]) ForEach(f func(k K, v V)) {
|
|
|
|
|
for k, v := range m.ж {
|
|
|
|
|
f(k, v)
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
// MapFnOf returns a MapFn for m.
|
|
|
|
|
func MapFnOf[K comparable, T any, V any](m map[K]T, f func(T) V) MapFn[K, T, V] {
|
|
|
|
|
return MapFn[K, T, V]{
|
|
|
|
|
ж: m,
|
|
|
|
|
wrapv: f,
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
// MapFn is like Map but with a func to convert values from T to V.
|
|
|
|
|
// It is used to provide map of slices and views.
|
|
|
|
|
type MapFn[K comparable, T any, V any] struct {
|
|
|
|
|
// ж is the underlying mutable value, named with a hard-to-type
|
|
|
|
|
// character that looks pointy like a pointer.
|
|
|
|
|
// It is named distinctively to make you think of how dangerous it is to escape
|
|
|
|
|
// to callers. You must not let callers be able to mutate it.
|
|
|
|
|
ж map[K]T
|
|
|
|
|
wrapv func(T) V
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
// Has reports whether k has an entry in the map.
|
|
|
|
|
func (m MapFn[K, T, V]) Has(k K) bool {
|
|
|
|
|
_, ok := m.ж[k]
|
|
|
|
|
return ok
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
// Get returns the element with key k.
|
|
|
|
|
func (m MapFn[K, T, V]) Get(k K) V {
|
|
|
|
|
return m.wrapv(m.ж[k])
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
// IsNil reports whether the underlying map is nil.
|
|
|
|
|
func (m MapFn[K, T, V]) IsNil() bool {
|
|
|
|
|
return m.ж == nil
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
// Len returns the number of elements in the map.
|
|
|
|
|
func (m MapFn[K, T, V]) Len() int { return len(m.ж) }
|
|
|
|
|
|
|
|
|
|
// GetOk returns the element with key k and a bool representing whether the key
|
|
|
|
|
// is in map.
|
|
|
|
|
func (m MapFn[K, T, V]) GetOk(k K) (V, bool) {
|
|
|
|
|
v, ok := m.ж[k]
|
|
|
|
|
return m.wrapv(v), ok
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
// ForEach calls f for every k,v pair in the underlying map.
|
|
|
|
|
func (m MapFn[K, T, V]) ForEach(f func(k K, v V)) {
|
|
|
|
|
for k, v := range m.ж {
|
|
|
|
|
f(k, m.wrapv(v))
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
Maisem Ali
2 years ago
committed by