Follow Techotopia on Twitter

On-line Guides
All Guides
eBook Store
iOS / Android
Linux for Beginners
Office Productivity
Linux Installation
Linux Security
Linux Utilities
Linux Virtualization
Linux Kernel
System/Network Admin
Scripting Languages
Development Tools
Web Development
GUI Toolkits/Desktop
Mail Systems
Eclipse Documentation

How To Guides
General System Admin
Linux Security
Linux Filesystems
Web Servers
Graphics & Desktop
PC Hardware
Problem Solutions
Privacy Policy




Back: Templates
Forward: Standard library headers
FastBack: Exceptions
Up: Changeable C++
FastForward: Compiler Quirks
Top: Autoconf, Automake, and Libtool
Contents: Table of Contents
Index: Index
About: About this document

16.2.11 Default template arguments

A later refinement to C++ templates was the concept of default template arguments. Templates allow C++ types to be parameterized and as such, the parameter is in essence a variable that the programmer must specify when instantiating the template. This refinement allows defaults to be specified for the template parameters.

This feature is used extensively throughout the Standard Template Library (see section 16.2.13 Standard Template Library) to relieve the programmer from having to specify a comparison function for sorted container classes. In most circumstances, the default less-than operator for the type in question is sufficient.

If your compiler does not support default template arguments, you may have to suffer without them and require that users of your class and function templates provide the default parameters themselves. Depending on how inconvenient this is, you might begrudgingly seek some assistance from the C preprocessor and define some preprocessor macros.

This document was generated by Gary V. Vaughan on February, 8 2006 using texi2html

  Published under the terms of the Open Publication License Design by Interspire