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58 lines
1.9 KiB
Plaintext
58 lines
1.9 KiB
Plaintext
"use strict"
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const { getSourceCode } = require("eslint-compat-utils")
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module.exports = {
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meta: {
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docs: {
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description:
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"disallow identifiers from shadowing catch parameter names.",
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category: "legacy",
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recommended: false,
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url: "http://eslint-community.github.io/eslint-plugin-es-x/rules/no-shadow-catch-param.html",
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},
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fixable: null,
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messages: {
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forbidden: "Shadowing of catch parameter '{{name}}'.",
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},
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schema: [],
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type: "problem",
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},
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create(context) {
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const sourceCode = getSourceCode(context)
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return {
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"CatchClause > Identifier.param:exit"(node) {
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const scope = sourceCode.getScope(node)
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const shadowingVar = scope.variableScope.set.get(node.name)
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if (!shadowingVar) {
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return
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}
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for (const def of shadowingVar.defs) {
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if (def.type !== "Variable") {
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continue
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}
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const varDecl = def.node
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if (varDecl.parent.kind !== "var") {
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continue
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}
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const varId = varDecl.id
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const catchClause = node.parent
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const bodyRange = catchClause.body.range
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if (
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bodyRange[0] <= varId.range[0] &&
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varId.range[1] <= bodyRange[1]
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) {
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context.report({
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node: varDecl,
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messageId: "forbidden",
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data: {
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name: node.name,
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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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}
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