---
name: "std::_Enable_default_constructor"
section: "3cxx"
platform: "linux"
package: "libstdc++-10-doc"
version: "10.2.1-6"
release: "Debian 11 (Bullseye)"
platforms: ["linux"]
url: "https://new.carta.tech/std::_Enable_default_constructor"
---

# std::\_Enable\_default\_constructor(3cxx)

A mixin helper to conditionally enable or disable the default constructor.

## NAME

std::\_Enable\_default\_constructor\< \_Switch, \_Tag \> - A mixin helper to conditionally enable or disable the default constructor.

## SYNOPSIS

### Public Member Functions

constexpr **\_Enable\_default\_constructor** (**\_Enable\_default\_constructor** &&) noexcept=default\
 constexpr **\_Enable\_default\_constructor** (**\_Enable\_default\_constructor** const &) noexcept=default\
 constexpr **\_Enable\_default\_constructor** (\_Enable\_default\_constructor\_tag)\
 **\_Enable\_default\_constructor** & **operator=** (**\_Enable\_default\_constructor** &&) noexcept=default\
 **\_Enable\_default\_constructor** & **operator=** (**\_Enable\_default\_constructor** const &) noexcept=default\

## Detailed Description

### template\<bool \_Switch, typename \_Tag = void\>

struct std::\_Enable\_default\_constructor\< \_Switch, \_Tag \>" A mixin helper to conditionally enable or disable the default constructor.

**See also**

\_Enable\_special\_members

Definition at line 50 of file enable\_special\_members.h.

## Author

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