Quite a time ago, my colleague accidentally committed a Youtube url to our Java codebase (middle-click accidental paste, no code review at that time). We had some laughing moments when we discovered it, as it was compelling evidence that he was watching videos during work, and even we knew what he was watching at that time.
I do this to embed shell commands at the beginning of short one-file C/C++ programs to execute when hitting an F key in my text editor. I usually put very basic compile-and-run commands. It's wrapped in #if and #endif which are comments in many shells. I end the commands with exit so it doesn't try to execute the code as commands.
Clearly, the "http:" is parsed as a label (for goto), and the subsequent "//", as a C++ or C99 comment. This shouldn't give you more than a moment's pause if you know C.
Nice.
Another neat comment-based construct is the good old:
It yields 'foo' as is, and 'bar' if the first slash is removed.It's not as needed in C given that you can use #if 1
It is handy in C derivatives, though.
Quite a time ago, my colleague accidentally committed a Youtube url to our Java codebase (middle-click accidental paste, no code review at that time). We had some laughing moments when we discovered it, as it was compelling evidence that he was watching videos during work, and even we knew what he was watching at that time.
This puzzle would become extra trivial with syntax highlighting.
You can only have one URL for each scheme though, else your compiler will report something like
error: redefinition of label 'https'
I do this to embed shell commands at the beginning of short one-file C/C++ programs to execute when hitting an F key in my text editor. I usually put very basic compile-and-run commands. It's wrapped in #if and #endif which are comments in many shells. I end the commands with exit so it doesn't try to execute the code as commands.
Of all the (ahem, not as many as hoped) things C++ got right, // comments are one of the best ones
And I'm glad it now is part of C as well
At least when using -Wall the compiler will give you the warning
as a hint.This is why you should only use /* */ as your comment style.
It's a puzzle. Nobody is going to put a URL amid your code. There is no harm in using // for comments.
It's a joke
How is this related to the article?
Solve the puzzle and you'll know :-)
Clearly, the "http:" is parsed as a label (for goto), and the subsequent "//", as a C++ or C99 comment. This shouldn't give you more than a moment's pause if you know C.
Or if you use a syntax highlighter.
Yes, I don't know why people are downvoting me. Have these people never seen C code using goto-based error handling?