Just implement infix:<%> and infix:<%%> already

[masak]

I just looked over the examples, and it maybe it's me being obsessed with modulo-related code examples — probably — but it would seem that all three of euclid-gcd.007, fizzbuzz.007, and nicomachus.007 would benefit from having infix:<%> (and infix:<%%>) built into the language.

So,

• Let's implement those.
• Let's not implement infix:</> for now. I'm still bothered by the things described in this comment.
• There's the risk of a division by zero, even with infix:<%> and infix:<%%>. So we'll need a new 007-exception type, and we'll need tests that try catching it.
• After we have the operators, we should go back and make the examples prettier.

[masak]

• There's the risk of a division by zero, even with infix:<%> and infix:<%%>. So we'll need a new 007-exception type, and we'll need tests that try catching it.

Actually, I ended up just using the Perl 6 exception (X::Numeric::DivideByZero) for now. We can save the custom-exceptions work for some later time, when we do it across the board.

[vendethiel]

actual commits: b19d939...8c0bb8e

[masak]

哈哈. I just read https://news.ycombinator.com/item?id=17045074 and got cold sweat. "Hey, did we ever consider this in 007?"

Turns out we did — the above commit range contains tests for negative divisor. Also, Perl 6 and Python agree that 5 % -2 = 1. Guido has a blog post explaining why this is sane semantics.

JavaScript on the other hand consider 5 % -2 to be -1.