J: From C to C++20

J is an array programming language created by Ken Iverson and Roger Hui (see image below).

This is a fork of jsoftware/jsource and we will be porting it to C++20.

Goals

• Reduce complexity of build options
• Compile with GCC 10+
• Compile with Clang 11+
• Remove all (most) of the macros
• Clang-format the code base
• Clang-tidy the code base
• Set up Travis-CI
• Set up CodeCov
• Set up badges
• Get both build / tests running in parallel
  • Parallel build (for free off of zhihaoy branch)
  • Parallel tests
• Monitor compile & run time perf while refactoring

Non-Codebase Goals

• Learn to not use mouse

Comparison of Languages

Calculating the first 10 odd numbers:

Python:

[1 + 2 * i for i in range(10)]

Haskell:

map (1+) $ map (2*) [0..9]
map ((+1) . (*2)) [0..9] -- alternative thanks to Alexandru Dinu

R:

-1+2*seq(10) -- thanks to Roi Barkan

APL:

1+2×⍳10

J:

1+2*i.10

Getting started & Building:

For building this repository, please see CONTRIBUTING.md.