Was this page helpful?
Your feedback about this content is important. Let us know what you think.
Additional feedback?
1500 characters remaining
Compiler Warning (level 4) C4289
Collapse the table of content
Expand the table of content

Compiler Warning (level 4) C4289

Error Message

nonstandard extension used : 'var' : loop control variable declared in the for-loop is used outside the for-loop scope

When compiling with /Ze and /Zc:forScope-, a variable declared in a for loop was used after the for-loop scope.

See /Zc:forScope for information about how to specify standard behavior in for loops with /Ze.

This warning is off by default. See Compiler Warnings That Are Off by Default for more information.

The following sample generates C4289:

// C4289.cpp
// compile with: /W4 /Zc:forScope-
#pragma warning(default:4289)
int main() {
   for (int i = 0 ; ; )   // C4289
      break;
   i++;
}

Community Additions

ADD
Show:
© 2015 Microsoft