sums-up/dist/sumtype.js

👍 Sums Up ===

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
function arrayEquals(a, b) {
    if (a === b)
        return true;
    if (a == null || b == null)
        return false;
    if (a.length != b.length)
        return false;
    for (var i = 0; i < a.length; ++i) {
        if (a[i] !== b[i])
            return false;
    }
    return true;
}
class SumType {
    constructor(...args) {
        let [variantName, ...data] = args;
        this.variantName = variantName;
        this.data = data;
    }
    // @deprecated
    get kind() {
        return this.variantName;
    }
    // Semi FSA compliancy
    get type() {
        return this.variantName;
    }
    caseOf(pattern) {
        if (this.variantName in pattern) {
            return pattern[this.variantName](...this.data);
        }
        else if (pattern._) {
            return pattern._();
        }
        else {
            throw new Error(`caseOf pattern is missing a function for ${this.variantName}`);
        }
    }
    equals(that) {
        return (this.variantName === that.variantName && arrayEquals(this.data, that.data));
    }
    toString() {
        if (this.data.length) {
            return `${this.variantName} ${JSON.stringify(this.data)}`;
        }
        return `${this.variantName}`;
    }
}
exports.default = SumType;