87 lines
2.3 KiB
Plaintext
87 lines
2.3 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 restSpreadSpacing = utils.createRule({
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name: "rest-spread-spacing",
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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: "Enforce spacing between rest and spread operators and their expressions"
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},
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fixable: "whitespace",
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schema: [
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{
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type: "string",
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enum: ["always", "never"]
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}
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],
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messages: {
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unexpectedWhitespace: "Unexpected whitespace after {{type}} operator.",
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expectedWhitespace: "Expected whitespace after {{type}} operator."
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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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const alwaysSpace = context.options[0] === "always";
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function checkWhiteSpace(node) {
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const operator = sourceCode.getFirstToken(node);
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const nextToken = sourceCode.getTokenAfter(operator);
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const hasWhitespace = sourceCode.isSpaceBetweenTokens(operator, nextToken);
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let type;
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switch (node.type) {
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case "SpreadElement":
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type = "spread";
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if (node.parent.type === "ObjectExpression")
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type += " property";
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break;
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case "RestElement":
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type = "rest";
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if (node.parent.type === "ObjectPattern")
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type += " property";
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break;
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default:
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return;
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}
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if (alwaysSpace && !hasWhitespace) {
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context.report({
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node,
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loc: operator.loc,
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messageId: "expectedWhitespace",
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data: {
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type
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},
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fix(fixer) {
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return fixer.replaceTextRange([operator.range[1], nextToken.range[0]], " ");
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}
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});
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} else if (!alwaysSpace && hasWhitespace) {
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context.report({
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node,
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loc: {
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start: operator.loc.end,
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end: nextToken.loc.start
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},
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messageId: "unexpectedWhitespace",
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data: {
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type
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},
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fix(fixer) {
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return fixer.removeRange([operator.range[1], nextToken.range[0]]);
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}
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});
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}
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}
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return {
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SpreadElement: checkWhiteSpace,
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RestElement: checkWhiteSpace
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};
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}
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});
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module.exports = restSpreadSpacing;
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