40 lines
1 KiB
TypeScript
40 lines
1 KiB
TypeScript
// @module: commonjs
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// @target: es6
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// @noImplicitAny: true
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export interface StrategicState {
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lastStrategyApplied?: string;
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}
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export function strategy<T extends StrategicState>(stratName: string, gen: (a: T) => IterableIterator<T | undefined>): (a: T) => IterableIterator<T | undefined> {
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return function*(state) {
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for (const next of gen(state)) {
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if (next) {
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next.lastStrategyApplied = stratName;
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}
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yield next;
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}
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}
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}
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export interface Strategy<T> {
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(a: T): IterableIterator<T | undefined>;
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}
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export interface State extends StrategicState {
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foo: number;
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}
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export const Nothing1: Strategy<State> = strategy("Nothing", function*(state: State) {
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return state;
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});
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export const Nothing2: Strategy<State> = strategy("Nothing", function*(state: State) {
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yield state;
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});
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export const Nothing3: Strategy<State> = strategy("Nothing", function* (state: State) {
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yield ;
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return state;
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});
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