---
name: "std::const_mem_fun1_ref_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::const_mem_fun1_ref_t"
---

# std::const\_mem\_fun1\_ref\_t(3cxx)

One of the adaptors for member pointers.

## NAME

std::const\_mem\_fun1\_ref\_t\< \_Ret, \_Tp, \_Arg \> - One of the **adaptors for member pointers**.

## SYNOPSIS

`#include <functional>`

Inherits **std::binary\_function\< \_Tp, \_Arg, \_Ret \>**.

### Public Types

**typedef** \_Tp **first\_argument\_type**\
 `first_argument_type` is the type of the first argument  **typedef** \_Ret **result\_type**\
 `result_type` is the return type  **typedef** \_Arg **second\_argument\_type**\
 `second_argument_type` is the type of the second argument

### Public Member Functions

**const\_mem\_fun1\_ref\_t** (\_Ret(\_Tp::\***\_\_pf**)(\_Arg) const)\
 \_Ret **operator()** (const \_Tp &\_\_r, \_Arg \_\_x) const\

## Detailed Description

### template\<typename \_Ret, typename \_Tp, typename \_Arg\>

class std::const\_mem\_fun1\_ref\_t\< \_Ret, \_Tp, \_Arg \>"One of the **adaptors for member pointers**.

## Member Typedef Documentation

### typedef \_Tp std::binary\_function\< \_Tp , \_Arg , \_Ret \>::first\_argument\_type` [inherited]`

`first_argument_type` is the type of the first argument

### typedef \_Ret std::binary\_function\< \_Tp , \_Arg , \_Ret \>::result\_type` [inherited]`

`result_type` is the return type

### typedef \_Arg std::binary\_function\< \_Tp , \_Arg , \_Ret \>::second\_argument\_type` [inherited]`

`second_argument_type` is the type of the second argument

## Author

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