---
name: "std::__future_base__Result_alloc"
section: "3cxx"
platform: "linux"
package: "libstdc++-11-doc"
version: "11.3.0-12"
release: "Debian 12 (Bookworm)"
platforms: ["linux"]
url: "https://new.carta.tech/std::__future_base__Result_alloc"
---

# std::\_\_future\_base\_\_Result\_alloc(3cxx)

A result object that uses an allocator.

## NAME

std::\_\_future\_base::\_Result\_alloc\< \_Res, \_Alloc \> - A result object that uses an allocator.

## SYNOPSIS

Inherits **std::\_\_future\_base::\_Result\< \_Res \>**, and \_Alloc.

### Public Types

using **\_\_allocator\_type** = \_\_alloc\_rebind\< \_Alloc, **\_Result\_alloc** \>\
 typedef \_Res **result\_type**\

### Public Member Functions

**\_Result\_alloc** (const \_Alloc &\_\_a)\
 void **\_M\_set** (\_Res &&\_\_res)\
 void **\_M\_set** (const \_Res &\_\_res)\
 \_Res & **\_M\_value** () noexcept\

### Public Attributes

**exception\_ptr** **\_M\_error**\

## Detailed Description

### template\<typename \_Res, typename \_Alloc\>

struct std::\_\_future\_base::\_Result\_alloc\< \_Res, \_Alloc \>"A result object that uses an allocator.

Definition at line **267** of file **future**.

## Member Typedef Documentation

### template\<typename \_Res , typename \_Alloc \> using std::\_\_future\_base::\_Result\_alloc\< \_Res, \_Alloc \>::\_\_allocator\_type = \_\_alloc\_rebind\<\_Alloc, \_Result\_alloc\>

Definition at line **269** of file **future**.

### template\<typename \_Res \> typedef \_Res std::\_\_future\_base::\_Result\< \_Res \>::result\_type` [inherited]`

Definition at line **233** of file **future**.

## Constructor & Destructor Documentation

### template\<typename \_Res , typename \_Alloc \> std::\_\_future\_base::\_Result\_alloc\< \_Res, \_Alloc \>::\_Result\_alloc (const \_Alloc & \_\_a)` [inline]`, ` [explicit]`

Definition at line **272** of file **future**.

## Member Function Documentation

### template\<typename \_Res \> void std::\_\_future\_base::\_Result\< \_Res \>::\_M\_set (\_Res && \_\_res)` [inline]`, ` [inherited]`

Definition at line **255** of file **future**.

### template\<typename \_Res \> void std::\_\_future\_base::\_Result\< \_Res \>::\_M\_set (const \_Res & \_\_res)` [inline]`, ` [inherited]`

Definition at line **248** of file **future**.

### template\<typename \_Res \> \_Res & std::\_\_future\_base::\_Result\< \_Res \>::\_M\_value ()` [inline]`, ` [noexcept]`, ` [inherited]`

Definition at line **245** of file **future**.

## Member Data Documentation

### exception\_ptr std::\_\_future\_base::\_Result\_base::\_M\_error` [inherited]`

Definition at line **202** of file **future**.

## Author

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