---
name: "std::promise"
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::promise"
---

# std::promise(3)

Primary template for promise.

## NAME

std::promise\< \_Res \> - Primary template for promise.

## SYNOPSIS

\#include \<future\>

### Public Member Functions

template\<typename \_Allocator\> **promise** (allocator\_arg\_t, const \_Allocator &, promise &&\_\_rhs)\
 template\<typename \_Allocator\> **promise** (allocator\_arg\_t, const \_Allocator &\_\_a)\
 **promise** (const promise &)=delete\
 **promise** (promise &&\_\_rhs) noexcept\
 **future**\< \_Res \> **get\_future** ()\
 promise & **operator=** (const promise &)=delete\
 promise & **operator=** (promise &&\_\_rhs) noexcept\
 void **set\_exception** (**exception\_ptr** \_\_p)\
 void **set\_exception\_at\_thread\_exit** (**exception\_ptr** \_\_p)\
 void **set\_value** (\_Res &&\_\_r)\
 void **set\_value** (const \_Res &\_\_r)\
 void **set\_value\_at\_thread\_exit** (\_Res &&\_\_r)\
 void **set\_value\_at\_thread\_exit** (const \_Res &\_\_r)\
 void **swap** (promise &\_\_rhs) noexcept\

### Friends

template\<typename, typename\> struct **\_State::\_Setter**\

## Detailed Description

### template\<typename \_Res\>

class std::promise\< \_Res \>"Primary template for promise.

## Author

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