Function getExtractStringType

test/fixtures/snapshot/typescript.js:61876–61882

(type)

                                        getLiteralTypeFromProperties(type, (noIndexSignatures ? 128 /* TypeFlags.StringLiteral */ : 402653316 /* TypeFlags.StringLike */) | (stringsOnly ? 0 : 296 /* TypeFlags.NumberLike */ | 12288 /* TypeFlags.ESSymbolLike */), stringsOnly === keyofStringsOnly && !noIndexSignatures);
        }
        function getExtractStringType(type) {
            if (keyofStringsOnly) {
                return type;
            }
            var extractTypeAlias = getGlobalExtractSymbol();
            return extractTypeAlias ? getTypeAliasInstantiation(extractTypeAlias, [type, stringType]) : stringType;
        }
        function getIndexTypeOrString(type) {
            var indexType = getExtractStringType(getIndexType(type));
            return indexType.flags & 131072 /* TypeFlags.Never */ ? stringType : indexType;