Function checkTypeForDuplicateIndexSignatures

test/fixtures/snapshot/typescript.js:80387–80428

(node)

            }
        }
        function checkTypeForDuplicateIndexSignatures(node) {
            if (node.kind === 258 /* SyntaxKind.InterfaceDeclaration */) {
                var nodeSymbol = getSymbolOfNode(node);
                // in case of merging interface declaration it is possible that we'll enter this check procedure several times for every declaration
                // to prevent this run check only for the first declaration of a given kind
                if (nodeSymbol.declarations && nodeSymbol.declarations.length > 0 && nodeSymbol.declarations[0] !== node) {
                    return;
                }
            }
            // TypeScript 1.0 spec (April 2014)
            // 3.7.4: An object type can contain at most one string index signature and one numeric index signature.
            // 8.5: A class declaration can have at most one string index member declaration and one numeric index member declaration
            var indexSymbol = getIndexSymbol(getSymbolOfNode(node));
            if (indexSymbol === null || indexSymbol === void 0 ? void 0 : indexSymbol.declarations) {
                var indexSignatureMap_1 = new ts.Map();
                var _loop_27 = function (declaration) {
                    if (declaration.parameters.length === 1 && declaration.parameters[0].type) {
                        forEachType(getTypeFromTypeNode(declaration.parameters[0].type), function (type) {
                            var entry = indexSignatureMap_1.get(getTypeId(type));
                            if (entry) {
                                entry.declarations.push(declaration);
                            }
                            else {
                                indexSignatureMap_1.set(getTypeId(type), { type: type, declarations: [declaration] });
                            }
                        });
                    }
                };
                for (var _i = 0, _a = indexSymbol.declarations; _i < _a.length; _i++) {
                    var declaration = _a[_i];
                    _loop_27(declaration);
                }
                indexSignatureMap_1.forEach(function (entry) {
                    if (entry.declarations.length > 1) {
                        for (var _i = 0, _a = entry.declarations; _i < _a.length; _i++) {
                            var declaration = _a[_i];
                            error(declaration, ts.Diagnostics.Duplicate_index_signature_for_type_0, typeToString(entry.type));
                        }
                    }
                });
            }
        }
        function checkPropertyDeclaration(node) {
            // Grammar checking
            if (!checkGrammarDecoratorsAndModifiers(node) && !checkGrammarProperty(node))