53 lines
1.5 KiB
Plaintext
53 lines
1.5 KiB
Plaintext
'use strict';
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var utils = require('../utils.js');
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require('eslint-visitor-keys');
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require('espree');
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require('estraverse');
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var noFloatingDecimal = utils.createRule({
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name: "no-floating-decimal",
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package: "js",
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meta: {
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type: "layout",
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docs: {
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description: "Disallow leading or trailing decimal points in numeric literals"
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},
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schema: [],
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fixable: "code",
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messages: {
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leading: "A leading decimal point can be confused with a dot.",
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trailing: "A trailing decimal point can be confused with a dot."
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}
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},
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create(context) {
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const sourceCode = context.sourceCode;
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return {
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Literal(node) {
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if (typeof node.value === "number") {
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if (node.raw.startsWith(".")) {
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context.report({
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node,
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messageId: "leading",
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fix(fixer) {
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const tokenBefore = sourceCode.getTokenBefore(node);
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const needsSpaceBefore = tokenBefore && tokenBefore.range[1] === node.range[0] && !utils.canTokensBeAdjacent(tokenBefore, `0${node.raw}`);
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return fixer.insertTextBefore(node, needsSpaceBefore ? " 0" : "0");
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}
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});
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}
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if (node.raw.indexOf(".") === node.raw.length - 1) {
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context.report({
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node,
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messageId: "trailing",
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fix: (fixer) => fixer.insertTextAfter(node, "0")
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});
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}
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}
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}
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};
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}
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});
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module.exports = noFloatingDecimal;
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