This Is a Programming Language (AN)

It's the first compiler I write. I am building a new own programming language.

	Variables	If/ElseIf/Else	Loop	Function	Recursion
Runtime	✔	✔	✔	✔	✔
Code Generation	✔	✔	✔	✔	✔

Grammar

See the grammar here

Requirements

Python version >= 3 (install python)

Instructions

Open your bash, got to project's root directory and then type python main.py --src tests\fibonacci.an. Type python main.py --help to see more options.
You can write your own algorithm creating a new file new_file.an and then running it as explained above.

Code Generation

source code

loop 7:
	print "Hello World"
endloop

is translated to:

namespace an
{
    class Program
    {
        static void Main()
        {

            for (int i = 0; i < 7; i += 1)
            {
                System.Console.WriteLine("Hello World");
            }

        }
    }
}

Abstract Syntax Tree (AST)

You can view AST while compiling

-> Statements
      |-> Loop
      |-> VarDeclare
      |______|______|-> x
      |______|-> =
      |______|______|-> Num
      |______|______|______|-> 0
      |______|-> x
      |-> <
      |______|-> Num
      |______|______|-> 10
      |______|-> x
      |-> =
      |______|______|-> x
      |______|-> +
      |______|______|-> Num
      |______|______|______|-> 1
      |-> Statements
      |______|-> Print
      |______|______|-> x

Samples

Fibonacci

declare n = 10
declare t = 0
declare tt = 1
declare nextTerm  = 0
loop declare i = 1; i <= n; i = i + 1:
    if i == 1:
        print t
    elseif i == 2:
        print tt
    endif
    nextTerm = t + tt
    t = tt
    tt = nextTerm
    print nextTerm
endloop

Output

Hello World

print "Hello World"

Output

Collections (array)

You still cannot change a value from a collection (contribute for this feature!)

declare collection = [1, 2, 3, 4, 5]
append(collection, 6)
loop declare i = 0; i < count(collection); i = i+1:
	print collection[i]
endloop

Output

While

declare x = 0
while x < 10:
	x = x + 1
	print x
elsewhile x < 20:
	x = x + 10
	print x
endwhile

Output

Loop (for loop)

Sample 1

loop declare x = 0; x < 10; x = x + 1:
	print x
endloop

Output

Sample 2

loop declare i = 0; 10:
	print "Hello World " + i
endloop

Output

Sample 3

loop 7:
	print "Hello World"
endloop

Output

Author

Alan Nunes da Silva

"Computer Enthusiast just for fun"

E-mail: alann.625@gmail.com
Linkedin: Alan Nunes

Thank you, I hope you like it!