Advent of Code 2021

Some Ada source-code proposals for the puzzles of the © Advent of Code, year 2021 contest prepared by Eric Wastl 😎

Follow links in this calendar

MON	TUE	WED	THU	FRI	SAT	SUN
-	-	01	02	03	04	05
06	07	08	09	10	11	12
13	14	15	16	17	18	19
20	21	22	23	24	25	-

Note: There are still other GitHub repositories (20+) with Ada code proposals.

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Goal

Aiming as a show-case of some best(?) Ada 2012/202x coding practices.

1. Readability
2. Modular & Object Oriented software design
3. Only using the libraries defined by the language, and shipped with any Ada compiler
4. Use multi-tasking design when appropriate
5. Execution time (performance) is not a first class goal (back to 1. & 2.)

Comments are welcome 😃

Other seasoned or just plain beginner developer have published their Ada code on github (or elsewhere...)

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Ada 202X

I used the forthcoming Ada 202x syntax and language-libraries, essentially:

• @ as a shorthand syntax, as in Sum := @ + 1;

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Tools used

• Pretty Printer: GNAT pretty-printer
• Compiler: GNAT CE 2021 with -gnat2022 activated
  • GNAT from GCC 10 should also be OK (not tested)
• Build: GNAT gprbuild
• Package-Library manager: Alire

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How to Build & Run

Alire (alr) needs to be initialized through a first alr build command. This completes ~/.config/alire/config.toml file.

To select the working Ada 2022 (WIP) compiler:

• alr toolchain --select
  • and select gnat_external=2021.0.0 [Detected at /opt/gnat-ce-2021/bin/gnat]

One may use plain gprbuild.

git clone https://github.com/AdaForge/Advent_of_Code_2021.git
cd Advent_of_Code_2021/puzzle_08
gprbuild
bin/puzzle_08 data/Puzzle_08.txt

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License & Disclaimers

Just plain open-source: CC0 Universal Public Domain dedication's Free Cultural Work