Login | Register   
RSS Feed
Download our iPhone app
Browse DevX
Sign up for e-mail newsletters from DevX

By submitting your information, you agree that devx.com may send you DevX offers via email, phone and text message, as well as email offers about other products and services that DevX believes may be of interest to you. DevX will process your information in accordance with the Quinstreet Privacy Policy.

Tip of the Day
Home » Tip Bank » C++
Language: C++
Expertise: Intermediate
Mar 27, 2000



Building the Right Environment to Support AI, Machine Learning and Deep Learning

The Linkage Type of Typedef Names

By default, a typedef name declared in the global scope has internal linkage. This means that separately compiled source files can't refer to a typedef declared in another source file, unless that typedef is explicitly declared "extern." In this respect, C++ is different from C, which make typedef names global by default. Thus, in C++ you are allowed to define the same typedef name in every separately compiled source file as long as the definitions are identical:

// file first.cpp
  typedef int I; // visible only in the scope of this file
  void func(I);

// file second.cpp
  typedef int I; // visible only in the scope of this file
  float func2(I);
Danny Kalev
Comment and Contribute






(Maximum characters: 1200). You have 1200 characters left.



Thanks for your registration, follow us on our social networks to keep up-to-date