Visual C++ Compiler Warning C4233

Message Text

nonstandard extension used : 'keyword' keyword only supported in C++, not C

Circumstances

Although the C++ compiler has code for raising this warning, it seems that this code is unreachable.

Severity

This warning is promoted to an error automatically (as if the corresponding -we option were generated internally before the compiler acts on options from the command line). By default however, this is a level 1 warning and a

#pragma warning (default : 4233) 

restores it to level 1 (no matter that the product documentation assigns this warning to level 4).