C/C++ Programmer's Guide (G06.25+)

C and C++ Extensions

HP C/C++ Programmer’s Guide for NonStop Systems—429301-008

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Declarations

identifier. Enforcing standards conformance is the default setting. To disable it, specify

the EXTENSIONS pragma.

TNS C and C++ always treat these HP extensions as reserved keywords. There is no

way to disable this behavior. This feature might cause some strictly conforming

program to fail to compile.

Declarations

This subsection lists all of the extensions HP has made to the declaration-

specifier syntax defined in the ISO/ANSI C standard. These syntax extensions also

apply to C++, because the rules for C are a subset of the rules for C++. In some cases,

C++ imposes additional usage considerations.

The storage-class-specifier, type-specifier, and type-qualifier are

defined in the ISO/ANSI C standard. Any extensions to these specifiers are described

in this subsection. The attribute-specifier is a P extension and is described

later in this subsection.

Storage Class Specifier

The _lowmem and export-attribute storage-class specifiers are HP extensions.

typedef, extern, static, auto, and register

are described in the ISO/ANSI C standard.

declaration-specifiers:

storage-class-specifier [ declaration-specifiers ]

type-specifier [ declaration-specifiers ]

type-qualifier [ declaration-specifiers ]

attribute-specifier [ declaration-specifiers ]

storage-class-specifier is one of:

typedef

extern

static

auto

export-attribute

_lowmem