A toy project for creating a simple programming language using Bison and Flex in C++.
$ ./yulang
Yu Language 0.0.1 (unstable, Oct 23 2021, 21:31:19)
use: yulang -c = interactive console
yulang <filename> = running the script file
yulang -v = version
yulang -h = this menu
(...) -d [end line] = developer/debug monitor
$ ./yulang -c
Yu Language 0.0.1 (unstable, Oct 23 2021, 21:31:19)
interactive:
y> var a = 3;
y> print(a);
print: 3
y> square a: {return a ^ 2;}
y> print(square(a : 10));
print: 100
y>
source codes:
print(10 + 30);
print(10 - 30);
print(10. / 30.);
print(10 * 30);
print(30 % 9);
print((5. + 5.) / 3.);
output:
$ ./yulang tests/stable/arithmetics.yu
print: 40
print: -20
print: 0.333333
print: 300
print: 3
print: 3.33333
source codes:
var a = "hello world";
print(a);
output:
$ ./yulang tests/stable/strings.yu
print: hello world
source codes: (//
is used for comments)
// create a square function
square p, l:
{
var L = p * l;
return L;
}
// using the square function in a volume function
volume t:
{
var V = square(p : 5, l : 6) * t;
return V;
}
// assigning volume return in myVol variable
var myVol = volume(4);
print(myVol);
output:
$ ./yulang tests/stable/functions.yu
print: 120
source codes: (var
is used for generating variables)
// defining variables
var a, b, c, d;
a = 10; // integer
b = .5; // float
c = 3.; // float
d = 3.14; // float
print(a);
print(b);
print(c);
print(d);
output:
$ ./yulang tests/stable/variables.yu
print: 10
print: 0.5
print: 3
print: 3.14
source codes in includes.yu
multiply a, b:
{
return a * b;
}
source codes in multi_files.yu
// relative to current directory of terminal (or shell)
// you can import multiple relative paths and they do not create errors
import: "tests/stable/multi_files/includes.yu"
import: "stable/multi_files/includes.yu"
import: "multi_files/includes.yu"
var c = multiply(a : 10, b : 20);
print(c);
output:
$ ./yulang tests/stable/multi_files.yu
print: 200