jakeweary / aoc2020

Advent of Code 2020 in Rust

Advent of Code 2020 in Rust

Goals

• Gotta go fast
• Somewhat idiomatic rust
• Hopefully no dependencies
• Occasional macro autism
• Learn something new

Non-goals

• Ridiculously-optimized algorithms
• Overly-verbose real-world-ish types

Things learned so far

• Would be really cool to have streaming iterators, io::Lines is nice but it allocates a string for each line
• One can accidentally create a recursive macro that seems to perform better than itertools' alternative
• Slice patterns were a thing all this time
• mem::swap and mem::replace come in handy when dealing with &mut references