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