---
name: "std::default_initializable"
section: "3"
platform: "linux"
package: "gcc"
version: "16.2.1+r23+gd564253eb6c8-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/std::default_initializable"
---

# std::default\_initializable(3)

\[concept.defaultinitializable\], concept default\_initializable

## NAME

std::default\_initializable - \[concept.defaultinitializable\], concept default\_initializable

## SYNOPSIS

\#include \<concepts\>

## Concept definition

```
    template<typename _Tp>
    concept default_initializable = constructible_from<_Tp>
      && requires
      {
        _Tp{};
        (void) ::new _Tp;
      }
```

## Detailed Description

\[concept.defaultinitializable\], concept default\_initializable

## Author

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