---
name: "std::ctype_base"
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::ctype_base"
---

# std::ctype\_base(3)

Base class for ctype.

## NAME

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

## SYNOPSIS

\#include \<locale\>

Inherited by **std::mask\< \_CharT \>**, **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.