96 lines
2.8 KiB
JavaScript
96 lines
2.8 KiB
JavaScript
/**
|
|
* @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('../types').Rule.RuleModule} */
|
|
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'),
|
|
});
|
|
}
|
|
}
|
|
},
|
|
};
|
|
},
|
|
};
|