Diagon is an interactive interpreter. It transforms markdown-style expression into an ascii-art representation.
It is written in C++ and use WebAssembly, HTML and CSS to make a Web Application. We also expose a command line interface and a JS library, for personal and 3rd party tools.
https://arthursonzogni.com/Diagon/
Diagon is also usable as a command line tool. For instance:
echo "1+1/2 + sum(i,0,10) = 113/2" | diagon Math
10
___
1 ╲ 113
1 + ─ + ╱ i = ───
2 ‾‾‾ 2
0 To use it, you can either compile it from source or use the precompiled binaries published on the snapstore:
sudo snap install diagon
It is also available as a Nix package:
nix run github:petertrotman/nixpkgs/Diagon#diagon(A pull request is open to have this merged into NixOS/nixpkgs here)
See the JS library diagonjs
npm i diagonjsimport Diagon from "diagonjs";const diagon = await Diagon.init();
diagon.translate.math("f(x) = 1 + x / (1 + x)", { style: "Unicode" });
// x
// f(x) = 1 + ─────
// 1 + xMake diagon easy to use inside your IDE. Thanks to contributors:
Mathematic Expression
input:
f(x) = 1 + x / (1 + x)
output (Unicode):
x
f(x) = 1 + ─────
1 + x
input:
sqrt(1+sqrt(1+x/2))
output (Unicode)
_____________
╱ _____
╱ ╱ x
╱ 1 + ╱ 1 + ─
╲╱ ╲╱ 2
input:
f(x) = 1 + x^2 + x^3 + x^(1+1/2)
output (Unicode):
⎛ 1⎞
⎜1 + ─⎟
2 3 ⎝ 2⎠
f(x) = 1 + x + x + x
input:
sum(i^2,i=0,n) = n^3/2+n^2/2+n/6
output (Unicode):
n
___ 3 2
╲ 2 n n n
╱ i = ── + ── + ─
‾‾‾ 2 2 6
i = 0
input:
int(x^2/2 * dx ,0,1) = 1/6
output (Unicode):
1
⌠ 2
⎮ x 1
⎮ ── ⋅ dx = ─
⌡ 2 6
0
input:
[a;b] + [c;d] = [a+c; b+d]
output (Unicode):
⎛a⎞ ⎛c⎞ ⎛a + c⎞
⎜ ⎟ + ⎜ ⎟ = ⎜ ⎟
⎝b⎠ ⎝d⎠ ⎝b + d⎠
input:
[1,2;3,4] * [x;y] = [1*x+2*y; 3*x+4*y]
⎛1 2⎞ ⎛x⎞ ⎛1 ⋅ x + 2 ⋅ y⎞
⎜ ⎟ ⋅ ⎜ ⎟ = ⎜ ⎟
⎝3 4⎠ ⎝y⎠ ⎝3 ⋅ x + 4 ⋅ y⎠
Sequence Diagram
input
Alice -> Bob: Hello Bob!
Alice <- Bob: Hello Alice!
Output (Unicode)
┌─────┐ ┌───┐
│Alice│ │Bob│
└──┬──┘ └─┬─┘
│ │
│ Hello Bob! │
│───────────>│
│ │
│Hello Alice!│
│<───────────│
┌──┴──┐ ┌─┴─┐
│Alice│ │Bob│
└─────┘ └───┘
Input
Renderer -> Browser: BeginNavigation()
Browser -> Network: URLRequest()
Browser <- Network: URLResponse()
Renderer <- Browser: CommitNavigation()
Renderer -> Browser: DidCommitNavigation()
Output (Unicode)
┌────────┐ ┌───────┐ ┌───────┐
│Renderer│ │Browser│ │Network│
└───┬────┘ └───┬───┘ └───┬───┘
│ │ │
│ BeginNavigation() │ │
│────────────────────>│ │
│ │ │
│ │URLRequest() │
│ │────────────>│
│ │ │
│ │URLResponse()│
│ │<────────────│
│ │ │
│ CommitNavigation() │ │
│<────────────────────│ │
│ │ │
│DidCommitNavigation()│ │
│────────────────────>│ │
┌───┴────┐ ┌───┴───┐ ┌───┴───┐
│Renderer│ │Browser│ │Network│
└────────┘ └───────┘ └───────┘
Input
1) Renderer -> Browser: Message 1
2) Renderer <- Browser: Message 2
Renderer: 1<2
Browser: 2<1
Output (Unicode)
┌────────┐┌───────┐
│Renderer││Browser│
└───┬────┘└───┬───┘
│ │
│──┐ │
│Message 2│
│<────────│
│ │ │
│Message 1│
│ └─────>│
┌───┴────┐┌───┴───┐
│Renderer││Browser│
└────────┘└───────┘
Tree
Input
Linux
Android
Debian
Ubuntu
Lubuntu
Kubuntu
Xubuntu
Xubuntu
Mint
Centos
Fedora
Output (Style Unicode 1)
Linux
├─Android
├─Debian
│ ├─Ubuntu
│ │ ├─Lubuntu
│ │ ├─Kubuntu
│ │ ├─Xubuntu
│ │ └─Xubuntu
│ └─Mint
├─Centos
└─Fedora
Output (Style ASCII 2)
Linux
+--Android
+--Debian
| +--Ubuntu
| | +--Lubuntu
| | +--Kubuntu
| | +--Xubuntu
| | `--Xubuntu
| `--Mint
+--Centos
`--Fedora
Output (Style Unicode right top)
───Linux─┬─Android
├─Debian─┬─Ubuntu─┬─Lubuntu
│ │ ├─Kubuntu
│ │ ├─Xubuntu
│ │ └─Xubuntu
│ └─Mint
├─Centos
└─Fedora
Output (Style Unicode right center)
┌─Android
│ ┌─Lubuntu
│ ├─Kubuntu
├─Debian─┬─Ubuntu─┼─Xubuntu
───Linux─┤ │ └─Xubuntu
│ └─Mint
├─Centos
└─Fedora
Frame
Input
#include <iostream>
using namespace std;
int main()
{
cout << "Hello, World!";
return 0;
}
Output
┌─┬────────────────────────────┐
│1│#include <iostream> │
│2│using namespace std; │
│3│ │
│4│int main() │
│5│{ │
│6│ cout << "Hello, World!";│
│7│ return 0; │
│8│} │
└─┴────────────────────────────┘
Table
Input
Column 1,Column 2,Column 3
C++,Web,Assembly
Javascript,CSS,HTML
Output (Style Unicode)
┌──────────┬────────┬────────┐
│Column 1 │Column 2│Column 3│
├──────────┼────────┼────────┤
│C++ │Web │Assembly│
├──────────┼────────┼────────┤
│Javascript│CSS │HTML │
└──────────┴────────┴────────┘
GraphPlanar
Input
if -> "then A" -> end
if -> "then B" -> end
end -> loop -> if
Output (Unicode)
┌──────────┐
│ if │
└△─┬──────┬┘
│ │ ┌▽─────┐
│ │ │then A│
│ │ └┬─────┘
│┌▽─────┐│
││then B││
│└┬─────┘│
│┌▽──────▽─┐
││ end │
│└┬────────┘
┌┴─▽─┐
│loop│
└────┘
GraphDAG
Input:
socks -> shoes
underwear -> shoes
underwear -> pants
pants -> shoes
pants -> belt
belt -> jacket
shirt -> belt
shirt -> tie
tie -> jacket
Output:
┌─────┐┌─────────┐┌─────┐
│socks││underwear││shirt│
└┬────┘└┬─┬──────┘└┬─┬──┘
│ │┌▽─────┐ │┌▽───────┐
│ ││pants │ ││tie │
│ │└┬──┬──┘ │└┬───────┘
┌▽──────▽─▽┐┌▽─────▽┐│
│shoes ││belt ││
└──────────┘└┬──────┘│
┌────────────▽───────▽┐
│jacket │
└─────────────────────┘
Input:
chrome -> content
chrome -> blink
chrome -> base
content -> blink
content -> net
content -> base
blink -> v8
blink -> CC
blink -> WTF
blink -> skia
blink -> base
blink -> net
weblayer -> content
weblayer -> chrome
weblayer -> base
net -> base
WTF -> base
Output
┌────────┐
│weblayer│
└┬─┬─┬───┘
│ │┌▽────────────────────────┐
│ ││chrome │
│ │└┬─────┬─────────────────┬┘
│┌▽─▽────┐│ │
││content││ │
│└┬─┬─┬──┘│ │
│ │ │┌▽───▽──────────────┐ │
│ │ ││blink │ │
│ │ │└┬──┬───┬─┬───┬───┬─┘ │
│ │┌▽─▽┐┌▽──┐│┌▽─┐┌▽─┐┌▽───┐│
│ ││net││WTF│││v8││CC││skia││
│ │└┬──┘└┬──┘│└──┘└──┘└────┘│
┌▽─▽─▽────▽───▽──────────────▽┐
│base │
└─────────────────────────────┘
Input:
random -> pool_urbg
random -> nonsecure_base
random -> seed_sequence
random -> distribution
nonsecure_base -> pool_urbg
nonsecure_base -> salted_seed_seq
seed_sequence -> pool_urbg
seed_sequence -> salted_seed_seq
seed_sequence -> seed_material
distribution -> strings
pool_urbg -> seed_material
salted_seed_seq -> seed_material
seed_material -> strings
Output:
┌───────────────────────────────┐
│random │
└┬─────────────┬─────────────┬─┬┘
┌▽───────────┐┌▽────────────┐│┌▽─────────────┐
│distribution││seed_sequence│││nonsecure_base│
└┬───────────┘└┬───┬───────┬┘│└┬┬────────────┘
│ │ ┌│───────│─│─│┘
│ ┌───────────┘ ││ │ │┌┘
│ │┌─────────────▽▽┐┌─────▽─▽▽┐
│ ││salted_seed_seq││pool_urbg│
│ │└┬──────────────┘└┬────────┘
│┌▽─▽────────────────▽┐
││seed_material │
│└┬───────────────────┘
┌▽─▽────┐
│strings│
└───────┘
Flowchart
Input:
if ("DO YOU UNDERSTAND FLOW CHARTS?")
"GOOD!";
else if ("OKAY, YOU SEE THE LINE LABELED 'YES'?") {
if ("... AND YOU CAN SEE THE ONES LABELED 'NO'?") {
"GOOD";
} else {
if ("BUT YOU JUST FOLLOWED THEM TWICE?")
noop;
else
noop;
"(THAT WASN'T A QUESTION)";
"SCREW IT"
}
} else {
if ("BUT YOU SEE THE ONES LABELED 'NO'?") {
return "WAIT, WHAT?";
} else {
"LISTEN.";
return "I HATE YOU";
}
}
"LET'S GO DRING";
"HEY, I SHOULD TRY INSTALLING FREEBSD!"
Output:
_________________
╱ ╲ ┌─────┐
╱ DO YOU UNDERSTAND ╲____________________________________________________│GOOD!│
╲ FLOW CHARTS? ╱yes └──┬──┘
╲_________________╱ │
│no │
_________▽_________ ______________________ │
╱ ╲ ╱ ╲ ┌────┐ │
╱ OKAY, YOU SEE THE ╲________________╱ ... AND YOU CAN SEE ╲___│GOOD│ │
╲ LINE LABELED 'YES'? ╱yes ╲ THE ONES LABELED 'NO'? ╱yes└──┬─┘ │
╲___________________╱ ╲______________________╱ │ │
│no │no │ │
________▽_________ _________▽__________ │ │
╱ ╲ ┌───────────┐ ╱ ╲ │ │
╱ BUT YOU SEE THE ╲___│WAIT, WHAT?│ ╱ BUT YOU JUST ╲___ │ │
╲ ONES LABELED 'NO'? ╱yes└───────────┘ ╲ FOLLOWED THEM TWICE? ╱yes│ │ │
╲__________________╱ ╲____________________╱ │ │ │
│no │no │ │ │
┌───▽───┐ │ │ │ │
│LISTEN.│ └───────┬───────┘ │ │
└───┬───┘ ┌──────▽─────┐ │ │
┌─────▽────┐ │(THAT WASN'T│ │ │
│I HATE YOU│ │A QUESTION) │ │ │
└──────────┘ └──────┬─────┘ │ │
┌────▽───┐ │ │
│SCREW IT│ │ │
└────┬───┘ │ │
└─────┬─────┘ │
│ │
└─────┬─────┘
┌───────▽──────┐
│LET'S GO DRING│
└───────┬──────┘
┌─────────▽─────────┐
│HEY, I SHOULD TRY │
│INSTALLING FREEBSD!│
└───────────────────┘
Binaries using multiple formats are provided in the release section.
This depends on cmake, and libboost-graph-dev On Linux:
sudo apt install make libboost-graph-dev cmake default-jdk;
mkdir build;
cd build;
cmake .. -DCMAKE_BUILD_TYPE=Release
make -j
sudo make install 
This project has been possible thanks to these great projects