---
name: "std::is_placeholder"
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::is_placeholder"
---

# std::is\_placeholder(3)

Determines if the given type \_Tp is a placeholder in a bind() expression and, if so, which placeholder it is.

## NAME

std::is\_placeholder\< \_Tp \> - Determines if the given type \_Tp is a placeholder in a bind() expression and, if so, which placeholder it is.

## SYNOPSIS

\#include \<functional\>

Inherits **std::integral\_constant\< int, 0 \>**.

### Public Types

using **type**\
 using **value\_type**\

### Public Member Functions

constexpr **operator value\_type** () const noexcept\

### Static Public Attributes

static constexpr int **value**\

## Detailed Description

### template\<typename \_Tp\>

struct std::is\_placeholder\< \_Tp \>"Determines if the given type \_Tp is a placeholder in a bind() expression and, if so, which placeholder it is.

C++11 \[func.bind.isplace\].

**Since**

C++11

## Author

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