Function isSingletonTupleType

test/fixtures/snapshot/typescript.js:62516–62522

(node)

            return !root.isDistributive && isSingletonTupleType(root.node.checkType) && isSingletonTupleType(root.node.extendsType);
        }
        function isSingletonTupleType(node) {
            return ts.isTupleTypeNode(node) &&
                ts.length(node.elements) === 1 &&
                !ts.isOptionalTypeNode(node.elements[0]) &&
                !ts.isRestTypeNode(node.elements[0]) &&
                !(ts.isNamedTupleMember(node.elements[0]) && (node.elements[0].questionToken || node.elements[0].dotDotDotToken));
        }
        /**
         * We syntactually check for common nondistributive conditional shapes and unwrap them into
         * the intended comparison - we do this so we can check if the unwrapped types are generic or