C ++ macro # Use of val in unicode

Source: Internet
Author: User

The following is a detailed analysis of how to use c ++ macro # val in unicode. For more information, see

# Define CHECK (condition) cout <check failed: <# condition <endl;

When you CHECK (myfunc ();, if myfunc returns false, check failed: myfunc () is returned ()

In a macro, # condition converts the parameter to a string, which makes it easy to print the function name during log printing.

This may be known to everyone. It's too pediatric, but when you use it in unicode, garbled characters may occur.

Solution: # Replace condition with L ### conditon

Copy codeThe Code is as follows:


# Define CHECK (condition) cout <check failed: <L ### condition <endl;

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