/**
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* @fileoverview Rule to flag use of unary increment and decrement operators.
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* @author Ian Christian Myers
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* @author Brody McKee (github.com/mrmckeb)
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*/
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"use strict";
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//------------------------------------------------------------------------------
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// Rule Definition
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//------------------------------------------------------------------------------
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module.exports = {
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meta: {
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type: "suggestion",
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docs: {
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description: "disallow the unary operators `++` and `--`",
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category: "Stylistic Issues",
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recommended: false,
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url: "https://eslint.org/docs/rules/no-plusplus"
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},
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schema: [
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{
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type: "object",
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properties: {
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allowForLoopAfterthoughts: {
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type: "boolean",
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default: false
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}
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},
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additionalProperties: false
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}
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]
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},
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create(context) {
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const config = context.options[0];
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let allowInForAfterthought = false;
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if (typeof config === "object") {
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allowInForAfterthought = config.allowForLoopAfterthoughts === true;
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}
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return {
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UpdateExpression(node) {
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if (allowInForAfterthought && node.parent.type === "ForStatement") {
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return;
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}
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context.report({
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node,
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message: "Unary operator '{{operator}}' used.",
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data: {
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operator: node.operator
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}
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});
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}
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};
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}
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};
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