---
name: "std::tr1::__is_base_of_helper"
section: "3"
platform: "linux"
package: "libstdc++6-4.1-doc"
version: "4.1.1-21"
release: "Debian 4.0 (Etch)"
platforms: ["linux"]
url: "https://new.carta.tech/std::tr1::__is_base_of_helper"
---

# std::tr1::\_\_is\_base\_of\_helper(3)

## NAME

std::tr1::\_\_is\_base\_of\_helper -

## SYNOPSIS

Inherits **\_\_sfinae\_types**.

## Detailed Description

### template\<typename \_Base, typename \_Derived, bool = (!\_\_is\_union\_or\_class\<\_Base\>::value \|\| !\_\_is\_union\_or\_class\<\_Derived\>::value \|\| is\_same\<\_Base, \_Derived\>::value)\> struct std::tr1::\_\_is\_base\_of\_helper\< \_Base, \_Derived, \>

Definition at line 439 of file type\_traits.

### Public Types

typedef char **\_\_one**\

### Static Public Attributes

static const bool **\_\_value**\

## Author

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