| "use strict"; |
| var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) { |
| if (k2 === undefined) k2 = k; |
| Object.defineProperty(o, k2, { enumerable: true, get: function() { return m[k]; } }); |
| }) : (function(o, m, k, k2) { |
| if (k2 === undefined) k2 = k; |
| o[k2] = m[k]; |
| })); |
| var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) { |
| Object.defineProperty(o, "default", { enumerable: true, value: v }); |
| }) : function(o, v) { |
| o["default"] = v; |
| }); |
| var __importStar = (this && this.__importStar) || function (mod) { |
| if (mod && mod.__esModule) return mod; |
| var result = {}; |
| if (mod != null) for (var k in mod) if (k !== "default" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k); |
| __setModuleDefault(result, mod); |
| return result; |
| }; |
| Object.defineProperty(exports, "__esModule", { value: true }); |
| const utils_1 = require("@typescript-eslint/utils"); |
| const util = __importStar(require("../util")); |
| exports.default = util.createRule({ |
| name: 'no-redeclare', |
| meta: { |
| type: 'suggestion', |
| docs: { |
| description: 'Disallow variable redeclaration', |
| recommended: false, |
| extendsBaseRule: true, |
| }, |
| schema: [ |
| { |
| type: 'object', |
| properties: { |
| builtinGlobals: { |
| type: 'boolean', |
| }, |
| ignoreDeclarationMerge: { |
| type: 'boolean', |
| }, |
| }, |
| additionalProperties: false, |
| }, |
| ], |
| messages: { |
| redeclared: "'{{id}}' is already defined.", |
| redeclaredAsBuiltin: "'{{id}}' is already defined as a built-in global variable.", |
| redeclaredBySyntax: "'{{id}}' is already defined by a variable declaration.", |
| }, |
| }, |
| defaultOptions: [ |
| { |
| builtinGlobals: true, |
| ignoreDeclarationMerge: true, |
| }, |
| ], |
| create(context, [options]) { |
| const sourceCode = context.getSourceCode(); |
| const CLASS_DECLARATION_MERGE_NODES = new Set([ |
| utils_1.AST_NODE_TYPES.TSInterfaceDeclaration, |
| utils_1.AST_NODE_TYPES.TSModuleDeclaration, |
| utils_1.AST_NODE_TYPES.ClassDeclaration, |
| ]); |
| const FUNCTION_DECLARATION_MERGE_NODES = new Set([ |
| utils_1.AST_NODE_TYPES.TSModuleDeclaration, |
| utils_1.AST_NODE_TYPES.FunctionDeclaration, |
| ]); |
| const ENUM_DECLARATION_MERGE_NODES = new Set([ |
| utils_1.AST_NODE_TYPES.TSEnumDeclaration, |
| utils_1.AST_NODE_TYPES.TSModuleDeclaration, |
| ]); |
| function* iterateDeclarations(variable) { |
| if ((options === null || options === void 0 ? void 0 : options.builtinGlobals) && |
| 'eslintImplicitGlobalSetting' in variable && |
| (variable.eslintImplicitGlobalSetting === 'readonly' || |
| variable.eslintImplicitGlobalSetting === 'writable')) { |
| yield { type: 'builtin' }; |
| } |
| if ('eslintExplicitGlobalComments' in variable && |
| variable.eslintExplicitGlobalComments) { |
| for (const comment of variable.eslintExplicitGlobalComments) { |
| yield { |
| type: 'comment', |
| node: comment, |
| loc: util.getNameLocationInGlobalDirectiveComment(sourceCode, comment, variable.name), |
| }; |
| } |
| } |
| const identifiers = variable.identifiers |
| .map(id => ({ |
| identifier: id, |
| parent: id.parent, |
| })) |
| // ignore function declarations because TS will treat them as an overload |
| .filter(({ parent }) => parent.type !== utils_1.AST_NODE_TYPES.TSDeclareFunction); |
| if (options.ignoreDeclarationMerge && identifiers.length > 1) { |
| if ( |
| // interfaces merging |
| identifiers.every(({ parent }) => parent.type === utils_1.AST_NODE_TYPES.TSInterfaceDeclaration)) { |
| return; |
| } |
| if ( |
| // namespace/module merging |
| identifiers.every(({ parent }) => parent.type === utils_1.AST_NODE_TYPES.TSModuleDeclaration)) { |
| return; |
| } |
| if ( |
| // class + interface/namespace merging |
| identifiers.every(({ parent }) => CLASS_DECLARATION_MERGE_NODES.has(parent.type))) { |
| const classDecls = identifiers.filter(({ parent }) => parent.type === utils_1.AST_NODE_TYPES.ClassDeclaration); |
| if (classDecls.length === 1) { |
| // safe declaration merging |
| return; |
| } |
| // there's more than one class declaration, which needs to be reported |
| for (const { identifier } of classDecls) { |
| yield { type: 'syntax', node: identifier, loc: identifier.loc }; |
| } |
| return; |
| } |
| if ( |
| // class + interface/namespace merging |
| identifiers.every(({ parent }) => FUNCTION_DECLARATION_MERGE_NODES.has(parent.type))) { |
| const functionDecls = identifiers.filter(({ parent }) => parent.type === utils_1.AST_NODE_TYPES.FunctionDeclaration); |
| if (functionDecls.length === 1) { |
| // safe declaration merging |
| return; |
| } |
| // there's more than one function declaration, which needs to be reported |
| for (const { identifier } of functionDecls) { |
| yield { type: 'syntax', node: identifier, loc: identifier.loc }; |
| } |
| return; |
| } |
| if ( |
| // enum + namespace merging |
| identifiers.every(({ parent }) => ENUM_DECLARATION_MERGE_NODES.has(parent.type))) { |
| const enumDecls = identifiers.filter(({ parent }) => parent.type === utils_1.AST_NODE_TYPES.TSEnumDeclaration); |
| if (enumDecls.length === 1) { |
| // safe declaration merging |
| return; |
| } |
| // there's more than one enum declaration, which needs to be reported |
| for (const { identifier } of enumDecls) { |
| yield { type: 'syntax', node: identifier, loc: identifier.loc }; |
| } |
| return; |
| } |
| } |
| for (const { identifier } of identifiers) { |
| yield { type: 'syntax', node: identifier, loc: identifier.loc }; |
| } |
| } |
| function findVariablesInScope(scope) { |
| for (const variable of scope.variables) { |
| const [declaration, ...extraDeclarations] = iterateDeclarations(variable); |
| if (extraDeclarations.length === 0) { |
| continue; |
| } |
| /* |
| * If the type of a declaration is different from the type of |
| * the first declaration, it shows the location of the first |
| * declaration. |
| */ |
| const detailMessageId = declaration.type === 'builtin' |
| ? 'redeclaredAsBuiltin' |
| : 'redeclaredBySyntax'; |
| const data = { id: variable.name }; |
| // Report extra declarations. |
| for (const { type, node, loc } of extraDeclarations) { |
| const messageId = type === declaration.type ? 'redeclared' : detailMessageId; |
| if (node) { |
| context.report({ node, loc, messageId, data }); |
| } |
| else if (loc) { |
| context.report({ loc, messageId, data }); |
| } |
| } |
| } |
| } |
| /** |
| * Find variables in the current scope. |
| */ |
| function checkForBlock(node) { |
| const scope = context.getScope(); |
| /* |
| * In ES5, some node type such as `BlockStatement` doesn't have that scope. |
| * `scope.block` is a different node in such a case. |
| */ |
| if (scope.block === node) { |
| findVariablesInScope(scope); |
| } |
| } |
| return { |
| Program() { |
| const scope = context.getScope(); |
| findVariablesInScope(scope); |
| // Node.js or ES modules has a special scope. |
| if (scope.type === 'global' && |
| scope.childScopes[0] && |
| // The special scope's block is the Program node. |
| scope.block === scope.childScopes[0].block) { |
| findVariablesInScope(scope.childScopes[0]); |
| } |
| }, |
| FunctionDeclaration: checkForBlock, |
| FunctionExpression: checkForBlock, |
| ArrowFunctionExpression: checkForBlock, |
| BlockStatement: checkForBlock, |
| ForStatement: checkForBlock, |
| ForInStatement: checkForBlock, |
| ForOfStatement: checkForBlock, |
| SwitchStatement: checkForBlock, |
| }; |
| }, |
| }); |
| //# sourceMappingURL=no-redeclare.js.map |
