53 lines
1.3 KiB
JavaScript
53 lines
1.3 KiB
JavaScript
function applyMany(length, f, args) {
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if (length === 0) return f;
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else if (length === 1) return f(args);
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return applyMany(length - 1, f(args.value0), args.value1);
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}
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/**
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* Collect an arbitrary number of arguments inside an array.
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*
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* @param { number } count The number of arguments to collect.
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* @param { (arguments: any[]) => T } then Callback to give the argument array to.
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*/
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const collectArguments = (count, then) => {
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if (count === 0) return then([]);
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return (argument) =>
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collectArguments(count - 1, (arguments) => [argument, ...arguments]);
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};
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exports.curryImpl = (mkTuple, length, f) => {
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if (length <= 1) return f;
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return collectArguments(length, (arguments) => {
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const tuples = arguments.reduceRight(mkTuple);
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return f(tuples);
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});
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};
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exports.handleImpl = (matchLune, request, casePure, matchers, target) =>
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matchLune(target, {
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pure: casePure,
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request: (length, key, parameters, continuation) => {
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console.log(length);
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if (Reflect.has(matchers, key)) {
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return applyMany(length, matchers[key](continuation), parameters);
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}
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return request((f) =>
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f(key)(parameters)((result) =>
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handleImpl(
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matchLune,
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request,
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casePure,
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matchers,
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continuation(result)
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)
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)
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);
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},
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});
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