ags

home/ags/node_modules/eslint-plugin-es-x/lib/rules/no-shadow-catch-param.js

@@ -0,0 +1,57 @@
+"use strict"
+
+const { getSourceCode } = require("eslint-compat-utils")
+
+module.exports = {
+    meta: {
+        docs: {
+            description:
+                "disallow identifiers from shadowing catch parameter names.",
+            category: "legacy",
+            recommended: false,
+            url: "http://eslint-community.github.io/eslint-plugin-es-x/rules/no-shadow-catch-param.html",
+        },
+        fixable: null,
+        messages: {
+            forbidden: "Shadowing of catch parameter '{{name}}'.",
+        },
+        schema: [],
+        type: "problem",
+    },
+    create(context) {
+        const sourceCode = getSourceCode(context)
+        return {
+            "CatchClause > Identifier.param:exit"(node) {
+                const scope = sourceCode.getScope(node)
+                const shadowingVar = scope.variableScope.set.get(node.name)
+                if (!shadowingVar) {
+                    return
+                }
+                for (const def of shadowingVar.defs) {
+                    if (def.type !== "Variable") {
+                        continue
+                    }
+                    const varDecl = def.node
+                    if (varDecl.parent.kind !== "var") {
+                        continue
+                    }
+                    const varId = varDecl.id
+                    const catchClause = node.parent
+                    const bodyRange = catchClause.body.range
+                    if (
+                        bodyRange[0] <= varId.range[0] &&
+                        varId.range[1] <= bodyRange[1]
+                    ) {
+                        context.report({
+                            node: varDecl,
+                            messageId: "forbidden",
+                            data: {
+                                name: node.name,
+                            },
+                        })
+                    }
+                }
+            },
+        }
+    },
+}