---
name: "std::tr1::_Derives_from_unary_function"
section: "3cxx"
platform: "linux"
package: "libstdc++6-4.4-doc"
version: "4.4.5-8"
release: "Debian 6.0 (Squeeze)"
platforms: ["linux"]
url: "https://new.carta.tech/std::tr1::_Derives_from_unary_function/3cxx"
---

# std::tr1::\_Derives\_from\_unary\_function(3cxx)

Determines if the type \_Tp derives from unary\_function.

## NAME

std::tr1::\_Derives\_from\_unary\_function -

Determines if the type \_Tp derives from **unary\_function**.

## SYNOPSIS

Inherits std::tr1::\_\_sfinae\_types.

### Public Types

typedef char **\_\_one**\

### Static Public Attributes

static const bool **value**\

## Detailed Description

### template\<typename \_Tp\> struct std::tr1::\_Derives\_from\_unary\_function\< \_Tp \>

Determines if the type \_Tp derives from **unary\_function**.

Definition at line 210 of file tr1\_impl/functional.

## Author

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