DogLang Programming Language

🐕 Welcome to DogLang!

DogLang is a fun, interpreted programming language I created with syntax inspired by our canine friends. With keywords like bark for printing, wagtail for loops, and sniff for conditionals, it brings a playful approach to coding.

🚀 Join the Pack!

This is an open-source hobby project that welcomes contributors of all experience levels. Whether you're a seasoned developer or just starting out:

• Experiment with the language
• Suggest new "dog-themed" features
• Help improve documentation
• Add new functionality
• Fix bugs

The goal is to create something enjoyable while learning about language design and interpretation. Pull requests and issues are very welcome on GitHub!

Overview

DogLang is a programming language with the following components:

• Lexical analyzer (Tokenizer)
• Syntax analyzer (Parser)
• Semantic analyzer
• Symbol table for variable management
• Interpreter for code execution

Language Features

• Variable assignments
• Arithmetic operations
• Conditional statements (sniff)
• Loop constructs (wagtail)
• Print statements (bark)
• Input (fetch)
• Comparison operators

Syntax Guide

Variables and Assignment

a = 10;

Print Statement

bark(variable_name);

Loop Statement

wagtail(condition) {
  // loop body
}

Conditional Statement

sniff(condition) {
  // if true
} else {
  // if false
}

Input Statement

a = fetch("Enter a value:");

Examples

Basic Loop Example

a = 0;
wagtail(a<100) { 
  bark(a);
  a = a+10;
}

This program initializes a variable a to 0, then loops while a is less than 100, printing the value of a and incrementing it by 10 each iteration.

Conditional Example

a = 10;
sniff(a%2==0) {
  bark("Even");
} else {
  bark("Odd");
}

This program checks if variable a is even or odd and prints the result.

Input Example

a = fetch("Enter the number");
wagtail(a<10) {
  bark(a);
  a = a+1;
}

This program asks the user for a number and then counts from that number up to 10.

How to Use DogLang

Installation

From GitHub

Clone this repository to your local machine:

git clone https://github.com/pallavrai/doglang.git
cd doglang

From PyPI

Install DogLang directly using pip:

pip install doglang

Running a DogLang Program

If installed from GitHub:

1. From a file:

   python doglang.py -f your_program.doggy
   

2. Directly from the command line:

   python doglang.py -e "a=10; bark(a);"
   

If installed from pip:

1. From a file:

   doglang -f your_program.doggy
   

2. Directly from the command line:

   doglang -e "a=10; bark(a);"
   

Additional Options

• To view the tokens generated from your code:

  doglang -f your_program.doggy --tokens
  

File Extensions

DogLang programs use the .doggy file extension.

Language Reference

Keywords

• bark: Print a value
• wagtail: Loop construct
• sniff: Conditional statement
• fetch: Input from user
• else: Alternative branch for conditionals

Operators

• Arithmetic: +, -, *, /, %
• Comparison: ==, !=, >, <, >=, <=
• Assignment: =

Tips for Writing DogLang Programs

1. Each statement should end with a semicolon (optional in some contexts)
2. Blocks of code are enclosed in curly braces {}
3. Variables don't need type declarations - they're inferred automatically

Limitations

• Currently only supports integer and string data types
• No function definitions
• Limited error reporting

Project Structure

• Tokenizer.py: Lexical analyzer
• SyntaxAnalyser.py: Parser
• SemanticAnalyser.py: Semantic analyzer
• main.py: Interpreter implementation
• SymbolTable.py: Symbol table for variable management