---
name: "std::nullopt_t"
section: "3cxx"
platform: "linux"
package: "libstdc++-12-doc"
version: "12.4.0-5"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/std::nullopt_t"
---

# std::nullopt\_t(3cxx)

Tag type to disengage optional objects.

## NAME

std::nullopt\_t - Tag type to disengage optional objects.

## SYNOPSIS

`#include <optional>`

### Public Types

enum class **\_Construct** { **\_Token** }\

### Public Member Functions

constexpr **nullopt\_t** (\_Construct) noexcept\

## Detailed Description

Tag type to disengage optional objects.

## Author

Generated automatically by Doxygen for libstdc++ from the source code.