29 lines
858 B
JavaScript
29 lines
858 B
JavaScript
import { Char, Double, Int } from "../primitives/types.js";
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export const compareNumbers = x => y => {
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if (typeof(x) !== 'number' || typeof(y) !== 'number') {
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throw new Error(`was only meant to compare numbers! got ${x} and ${y}`);
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}
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return (x < y) ? -1 : (x > y) ? 1 : 0;
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}
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export const compareStrings = x => y => {
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if (typeof(x) !== 'string' || typeof(y) !== 'string') {
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throw new Error(`was only meant to compare strings! got ${x} and ${y}`);
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}
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return (x < y) ? -1 : (x > y) ? 1 : 0;
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}
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export const compareBools = x => y => {
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if (typeof(x) !== 'boolean' || typeof(y) !== 'boolean') {
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throw new Error(`was only meant to compare booleans! got ${x} and ${y}`);
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}
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return x - y;
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};
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export const typeToCmp = new Map([
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[Int, compareNumbers],
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[Char, compareStrings],
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[Double, compareNumbers],
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[Boolean, compareBools],
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]);
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