---
name: "std::ctype_base"
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::ctype_base/3cxx"
---

# std::ctype\_base(3cxx)

Base class for ctype.

## NAME

std::ctype\_base - Base class for ctype.

## SYNOPSIS

`#include <locale>`

Inherited by **std::\_\_ctype\_abstract\_base\< wchar\_t \>**, **std::\_\_ctype\_abstract\_base\< \_CharT \>**, and **std::ctype\< char \>**.

### Public Types

**typedef** const int \* **\_\_to\_type**\
 **typedef** unsigned short **mask**\

### Static Public Attributes

**static** const mask **alnum**\
 **static** const mask **alpha**\
 **static** const mask **blank**\
 **static** const mask **cntrl**\
 **static** const mask **digit**\
 **static** const mask **graph**\
 **static** const mask **lower**\
 **static** const mask **print**\
 **static** const mask **punct**\
 **static** const mask **space**\
 **static** const mask **upper**\
 **static** const mask **xdigit**\

## Detailed Description

Base class for ctype.

## Author

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