epiphany/node_modules/nth-check/lib/index.js

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2023-12-09 22:48:07 -08:00
"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.sequence = exports.generate = exports.compile = exports.parse = void 0;
var parse_js_1 = require("./parse.js");
Object.defineProperty(exports, "parse", { enumerable: true, get: function () { return parse_js_1.parse; } });
var compile_js_1 = require("./compile.js");
Object.defineProperty(exports, "compile", { enumerable: true, get: function () { return compile_js_1.compile; } });
Object.defineProperty(exports, "generate", { enumerable: true, get: function () { return compile_js_1.generate; } });
/**
* Parses and compiles a formula to a highly optimized function.
* Combination of {@link parse} and {@link compile}.
*
* If the formula doesn't match any elements,
* it returns [`boolbase`](https://github.com/fb55/boolbase)'s `falseFunc`.
* Otherwise, a function accepting an _index_ is returned, which returns
* whether or not the passed _index_ matches the formula.
*
* Note: The nth-rule starts counting at `1`, the returned function at `0`.
*
* @param formula The formula to compile.
* @example
* const check = nthCheck("2n+3");
*
* check(0); // `false`
* check(1); // `false`
* check(2); // `true`
* check(3); // `false`
* check(4); // `true`
* check(5); // `false`
* check(6); // `true`
*/
function nthCheck(formula) {
return (0, compile_js_1.compile)((0, parse_js_1.parse)(formula));
}
exports.default = nthCheck;
/**
* Parses and compiles a formula to a generator that produces a sequence of indices.
* Combination of {@link parse} and {@link generate}.
*
* @param formula The formula to compile.
* @returns A function that produces a sequence of indices.
* @example <caption>Always increasing</caption>
*
* ```js
* const gen = nthCheck.sequence('2n+3')
*
* gen() // `1`
* gen() // `3`
* gen() // `5`
* gen() // `8`
* gen() // `11`
* ```
*
* @example <caption>With end value</caption>
*
* ```js
*
* const gen = nthCheck.sequence('-2n+5');
*
* gen() // 0
* gen() // 2
* gen() // 4
* gen() // null
* ```
*/
function sequence(formula) {
return (0, compile_js_1.generate)((0, parse_js_1.parse)(formula));
}
exports.sequence = sequence;
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