kirito
An experiment in cutting and connecting bits of list-like data-structures in C++ with ideas from Python
The name is kirito because slicing lists is cutting and connecting them, like kirito claims his name means. In addition, I envision this project becoming powerful, much like kirito, but never particularly likable, much like kirito.
I guess it should in theory support all random access sequence containers, and if you ask your compiler nicely, it should optimize down to something acceptable, and many errors in usage should be at compile time even if cryptic. I actually skimmed some compiled stuff with gcc and O3 and it looks pretty good.
Usage
The usage syntax is intended to remind one of Python list indexing syntax and how much better Python list indexing syntax is.
#include <kirito.h> // single header, header only library
using kirito::I; // for Slice Indexing (copies stored type)
using kirito::V; // for View Indexing (is actually a pair of iterators)
// All your base container constructors and stuff work
kirito::FancyContainer<std::vector<int>> fancy = {1, 2, 3, 4, 5, 6, 7, 8, 9};
// Get a slice of a fancy container starting at 1, until 5, in steps of 2
auto slice = fancy[I(1)(5)(2)];
// You can leave out start/stop/step python style
slice = fancy[I()(5)]; // 0 until 5 in steps of 1
slice = fancy[I(2)()(3)]; // 2 until end in steps of 3
// Don't like copies? V does the same thing, but gives you views into the base container
auto view = fancy[V(1)(5)(2)];
// You can pass views into things that expect containers, but like that obviously incurs a copy
int somefunction(std::vector<int> notaview);
somefunction(view);
Building Tests
I have a few tests written. It's all CMake, so:
mkdir build && cd build && cmake .. && make
History
Someone I knew from Animania, the University of Michigan Anime Club, complained about indexing into containers in C++, and wanted something more like Python. I was looking for a quick project to try to write some C++17 code. Here we are today.