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