What is the possible use for “#define for if (false) {} else for”?

Question

In another question, I just spotted this little pearl of C wisdom:

#define for if (false) {} else for

which caused MSVC to

Answer 1

According to a quick search it's a bug in MSVC that gets overcame.

As I understand it,

for(int i=0...){.....} 
//later at the same scope level in the same function
for(int i=0...){...}

will cause a redefinition of 'i' error.

If the for statement is enclosed in an if statement, the compiler works as it should so that there is no redefinition error(apparently it interprets scope levels of 'if' but not 'for')