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Remove PrismDerivation.map/flatMap()

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Aria Minaei 2022-12-01 14:13:07 +01:00
parent a073984b2f
commit e9bbb0ef41
2 changed files with 0 additions and 64 deletions
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27
packages/dataverse/src/derivations/IDerivation.ts
View file

@ -58,33 +58,6 @@ export interface IDerivation<V> {
* Gets the current value of the derivation. If the value is stale, it causes the derivation to freshen. * Gets the current value of the derivation. If the value is stale, it causes the derivation to freshen.
*/ */
getValue(): V getValue(): V
/**
* Creates a new derivation from this derivation using the provided mapping function. The new derivation's value will be
* `fn(thisDerivation.getValue())`.
*
* @param fn - The mapping function to use. Note: it accepts a plain value, not a derivation.
*/
map<T>(fn: (v: V) => T): IDerivation<T>
/**
* Same as {@link IDerivation.map}, but the mapping function can also return a derivation, in which case the derivation returned
* by `flatMap` takes the value of that derivation.
*
* @example
* ```ts
* // Simply using map() here would return the inner derivation when we call getValue()
* new Box(3).derivation.map((value) => new Box(value).derivation).getValue()
*
* // Using flatMap() eliminates the inner derivation
* new Box(3).derivation.flatMap((value) => new Box(value).derivation).getValue()
* ```
*
* @param fn - The mapping function to use. Note: it accepts a plain value, not a derivation.
*/
flatMap<R>(
fn: (v: V) => R,
): IDerivation<R extends IDerivation<infer T> ? T : R>
} }
/** /**

37
packages/dataverse/src/derivations/prism/prism.ts
View file

@ -360,43 +360,6 @@ class PrismDerivation<V> implements IDerivation<V> {
reportResolutionEnd(this) reportResolutionEnd(this)
return val return val
} }
/**
* A simple mapping function similar to Array.map()
*
* @deprecated This is a remnant of the old monadic api. Now it's functionally equal to `prism(() => fn(der.getValue()))`, so use that instead.
*/
map<T>(fn: (v: V) => T): IDerivation<T> {
console.log('map')
return prism(() => fn(this.getValue()))
}
/**
* Same as {@link AbstractDerivation.map}, but the mapping function can also return a derivation, in which case the derivation returned
* by `flatMap` takes the value of that derivation.
*
* @deprecated This is a remnant of the old monadic api. Now it's functionally equal to `prism(() => val(fn(val(der))))`
*
* @example
* ```ts
* // Simply using map() here would return the inner derivation when we call getValue()
* new Box(3).derivation.map((value) => new Box(value).derivation).getValue()
*
* // Using flatMap() eliminates the inner derivation
* new Box(3).derivation.flatMap((value) => new Box(value).derivation).getValue()
* ```
*
* @param fn - The mapping function to use. Note: it accepts a plain value, not a derivation.
*/
flatMap<R>(
fn: (v: V) => R,
): IDerivation<R extends IDerivation<infer T> ? T : R> {
console.log('flatMap')
return prism(() => {
return possibleDerivationToValue(fn(this.getValue()))
})
}
} }
interface PrismScope { interface PrismScope {