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C++ In a Nutshell
book

C++ In a Nutshell

by Ray Lischner
May 2003
Intermediate to advanced content levelIntermediate to advanced
808 pages
32h 24m
English
O'Reilly Media, Inc.
Content preview from C++ In a Nutshell

Name

register storage class — Register storage class specifier

Synopsis

               storage-class-specifier := register

The register storage class is like auto: it can be used for local objects and function parameters, and using it means that the declared object has automatic lifetime. It also provides a hint to the compiler that the object will be used frequently, so the compiler can optimize access, perhaps by storing the object in a machine register.

Many modern compilers routinely ignore register because the compilers are better than humans at allocating registers.

Example

int foo(register int parm)
{
  register int sqr = parm * parm;
  return sqr;
}

See Also

auto, type, Chapter 2

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Publisher Resources

ISBN: 059600298XSupplemental ContentErrata Page