[Solved] Why putting a macros argument in parentheses leads to an error? [closed]

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Because ‘<‘ is a binary operator and it cannot be evaluated without an operand on either side. You can verify this without macros simply by attempting to compile the following code:

bool LessThan( int a, int b )
{
    return( a (<) b );
}

At the very least you should see “expected an expression” or a similar error.

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solved Why putting a macros argument in parentheses leads to an error? [closed]