Today, I was working on a bit of code that I wanted to switch between two versions quickly. So I used a few commenting tricks to do it.
1: End a comment, if it exists
If there is a multi-line comment before this, it will end the comment here. If not, the rest of the line will simply be skipped.
Here’s a basic example of this:
int startOfMultiLineComment = 0; /* Multi-line comment //*/ int endOfMultiLineComment = 0; //*/ int notCommented = 0;
2: Toggle comments
If there is a multi-line comment before this, it will be ended. If not, one will be started.
Here’s an example:
int startOfComment = 0; /*/ Commented out /*/ int endOfComment = 0;
3: Not the start of a comment
I use this to say “maybe start a comment, maybe not”. This is the disabled state; only this line is commented. To enable it, just delete one of the
//* int maybeCommented = 0; //*/ // See #1
Then I can quickly switch to:
/* int maybeCommented = 0; (This is commented out) //*/ // See #1
So I use this to switch between two variations of a file quickly:
// Variation 1 //* int variation1 = 0; /*/ int variation2 = 0; //*/ // Variation 2 /* int variation1 = 0; /*/ int variation2 = 0; //*/