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/**
* @fileoverview Rule to flag use of a leading/trailing decimal point in a numeric literal
* @author James Allardice
* @deprecated in ESLint v8.53.0
*/
"use strict";
//------------------------------------------------------------------------------
// Requirements
//------------------------------------------------------------------------------
const astUtils = require("./utils/ast-utils");
//------------------------------------------------------------------------------
// Rule Definition
//------------------------------------------------------------------------------
/** @type {import('../shared/types').Rule} */
module.exports = {
meta: {
deprecated: {
message: "Formatting rules are being moved out of ESLint core.",
url: "https://eslint.org/blog/2023/10/deprecating-formatting-rules/",
deprecatedSince: "8.53.0",
availableUntil: "10.0.0",
replacedBy: [
{
message: "ESLint Stylistic now maintains deprecated stylistic core rules.",
url: "https://eslint.style/guide/migration",
plugin: {
name: "@stylistic/eslint-plugin-js",
url: "https://eslint.style/packages/js"
},
rule: {
name: "no-floating-decimal",
url: "https://eslint.style/rules/js/no-floating-decimal"
}
}
]
},
type: "suggestion",
docs: {
description: "Disallow leading or trailing decimal points in numeric literals",
recommended: false,
url: "https://eslint.org/docs/latest/rules/no-floating-decimal"
},
schema: [],
fixable: "code",
messages: {
leading: "A leading decimal point can be confused with a dot.",
trailing: "A trailing decimal point can be confused with a dot."
}
},
create(context) {
const sourceCode = context.sourceCode;
return {
Literal(node) {
if (typeof node.value === "number") {
if (node.raw.startsWith(".")) {
context.report({
node,
messageId: "leading",
fix(fixer) {
const tokenBefore = sourceCode.getTokenBefore(node);
const needsSpaceBefore = tokenBefore &&
tokenBefore.range[1] === node.range[0] &&
!astUtils.canTokensBeAdjacent(tokenBefore, `0${node.raw}`);
return fixer.insertTextBefore(node, needsSpaceBefore ? " 0" : "0");
}
});
}
if (node.raw.indexOf(".") === node.raw.length - 1) {
context.report({
node,
messageId: "trailing",
fix: fixer => fixer.insertTextAfter(node, "0")
});
}
}
}
};
}
};