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SER 502: Team 26 - Final Project (Spring '23)

SAANP (.hiss)

SAANP is a programming language that is inspired by the simpleness of Python.

It is easy to code in, therefore useful for beginners. However, unlike Python which relies on indentation, SAANP takes inspiration from C, but uses . to separate the statements and endif/endwhile/endfor to determine the end of block.

SAANP, similar to Python, is a dynamically typed language, and variable declaration can happen anywhere throughout the program.

Note - The declared variables are available in the global scope, for the rest of the program.

For detailed language specification: SER502-Spring2023-Team26-Milestone1.pdf

Project Video: YouTube

How to

Prerequisites for execution

  • In Mac/Linux, execution permission will be required to run saanp.sh. One can do so by running the following command - chmod +x saanp.sh
  • In Windows, permission is required to run powershell scripts. Run the following command in Powershell (Run as administrator) - set-executionpolicy remotesigned

Note - parser.pl is using a third-party library for regular expressions and if one does not have the package installed in their prolog installation, SAANP will provide a prompt upon execution, to install the package. One will require to say yes to the prompt.

Execution Steps

LINUX/ MAC OS:

  • Go to the src folder - cd src
  • Run saanp.sh with a .hiss file as an argument - ./saanp.sh <Path to .hiss file>

Windows:

  • Go to the src folder - cd src
  • Run saanp.ps1 with a .hiss file as an argument - .\saanp.ps1 <Path to .hiss file>

Syntax Examples

IF STATEMENTS

if x == 1:
   y = 2.
	if z != 3:
		y = y + 1.
	endif
endif

if x > 1:
   y = 2.
else:
   y = 3.
endif

TERNARY EXPRESSION

x = 3.
y = 9.
print(x).
print(y).

z = x > y ? x : y.
print("Greater Number:").
print(z).

WHILE-LOOP

print(“Remainder of 15/3”).
num1 = 15.

while num1 > -1:
   num1 = num1 - 3.
endwhile

print(num1).

TRADITIONAL FOR-LOOP

print(“Even numbers:”).
for i = 2, i < x , i = i + 2:
   print(i).
endfor

ENHANCED FOR-LOOP

sum = 0.
print("Sum of numbers 1 to 5").

for i in range(1, 5):
    sum = sum + i.
endfor

print(sum).

Note - Nesting is supported.

Variables names can be a combination, of any length > 0, of the small alphabets a-z, underscore _ and digits 0-9, but should not begin with a number. It cannot match the reserved keywords.

Reserved Keywords: True, False, if, else, endif, for, endfor, while, endwhile, range, print.

Language doesn't support the following syntax:

  • More than 1 logical operator in a boolean expression ex1 and not ex2.
  • Assignment in an expression if x=1: ....
  • integer or string value as a boolean expression x=2. if x: ....
  • Double quotes within a string literal x=”He said “Ok”.”..

Tools Used

  • Tokenizer - Python (3.8.0+)
  • Parser - Prolog (SWI-Prolog version 9.0.4)
  • Evaluator - Prolog (SWI-Prolog version 9.0.4)
  • Execution in MacOS/Linux - Bash/Shell
  • Execution in Windows - Powershell

Execution Process

1. Input

sum = 0.
print("Sum of numbers 1 to 4").

for i in range(1, 5):
    sum = sum + i.
endfor

print(sum).

2. Tokenization

3. Parsing

4. Evaluation

Thank You!