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codeql-action/node_modules/eslint/lib/rules/no-floating-decimal.js
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/** | |
* @fileoverview Rule to flag use of a leading/trailing decimal point in a numeric literal | |
* @author James Allardice | |
*/ | |
"use strict"; | |
//------------------------------------------------------------------------------ | |
// Requirements | |
//------------------------------------------------------------------------------ | |
const astUtils = require("./utils/ast-utils"); | |
//------------------------------------------------------------------------------ | |
// Rule Definition | |
//------------------------------------------------------------------------------ | |
/** @type {import('../shared/types').Rule} */ | |
module.exports = { | |
meta: { | |
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") | |
}); | |
} | |
} | |
} | |
}; | |
} | |
}; |