Function getTupleTargetType

test/fixtures/snapshot/typescript.js:60912–60925

(elementFlags, readonly, namedMemberDeclarations)

                    tupleTarget;
        }
        function getTupleTargetType(elementFlags, readonly, namedMemberDeclarations) {
            if (elementFlags.length === 1 && elementFlags[0] & 4 /* ElementFlags.Rest */) {
                // [...X[]] is equivalent to just X[]
                return readonly ? globalReadonlyArrayType : globalArrayType;
            }
            var key = ts.map(elementFlags, function (f) { return f & 1 /* ElementFlags.Required */ ? "#" : f & 2 /* ElementFlags.Optional */ ? "?" : f & 4 /* ElementFlags.Rest */ ? "." : "*"; }).join() +
                (readonly ? "R" : "") +
                (namedMemberDeclarations && namedMemberDeclarations.length ? "," + ts.map(namedMemberDeclarations, getNodeId).join(",") : "");
            var type = tupleTypes.get(key);
            if (!type) {
                tupleTypes.set(key, type = createTupleTargetType(elementFlags, readonly, namedMemberDeclarations));
            }
            return type;
        }
        // We represent tuple types as type references to synthesized generic interface types created by
        // this function. The types are of the form:
        //