47 lines
959 B
JavaScript
47 lines
959 B
JavaScript
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/**
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* @fileoverview A class of identifiers generator for code path segments.
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*
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* Each rule uses the identifier of code path segments to store additional
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* information of the code path.
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*
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* @author Toru Nagashima
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*/
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"use strict";
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//------------------------------------------------------------------------------
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// Public Interface
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//------------------------------------------------------------------------------
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/**
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* A generator for unique ids.
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*/
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class IdGenerator {
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/**
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* @param {string} prefix - Optional. A prefix of generated ids.
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*/
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constructor(prefix) {
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this.prefix = String(prefix);
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this.n = 0;
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}
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/**
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* Generates id.
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*
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* @returns {string} A generated id.
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*/
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next() {
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this.n = 1 + this.n | 0;
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/* istanbul ignore if */
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if (this.n < 0) {
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this.n = 1;
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}
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return this.prefix + this.n;
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}
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}
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module.exports = IdGenerator;
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