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/**
* @fileoverview Rule to check use of chained assignment expressions
* @author Stewart Rand
*/
"use strict";
//------------------------------------------------------------------------------
// Rule Definition
//------------------------------------------------------------------------------
/** @type {import('../shared/types').Rule} */
module.exports = {
meta: {
type: "suggestion",
defaultOptions: [{
ignoreNonDeclaration: false
}],
docs: {
description: "Disallow use of chained assignment expressions",
recommended: false,
url: "https://eslint.org/docs/latest/rules/no-multi-assign"
},
schema: [{
type: "object",
properties: {
ignoreNonDeclaration: {
type: "boolean"
}
},
additionalProperties: false
}],
messages: {
unexpectedChain: "Unexpected chained assignment."
}
},
create(context) {
const [{ ignoreNonDeclaration }] = context.options;
const selectors = [
"VariableDeclarator > AssignmentExpression.init",
"PropertyDefinition > AssignmentExpression.value"
];
if (!ignoreNonDeclaration) {
selectors.push("AssignmentExpression > AssignmentExpression.right");
}
return {
[selectors](node) {
context.report({
node,
messageId: "unexpectedChain"
});
}
};
}
};