DR Compiler

DR Language & Compiler

DR is a custom programming language designed and built from scratch, along with its own compiler, as part of a deep exploration into compiler design, programming language theory, and software engineering.

This project implements the complete compilation pipeline—from lexical analysis to syntax parsing and semantic analysis—turning raw .dr source code into structured, validated executable logic.

DR was created to understand how real programming languages work under the hood by building every compiler component manually.

Project Overview

The project introduces a new programming language called DR, featuring its own syntax, grammar rules, keywords, data types, operators, and execution model.

The compiler reads .dr source files and processes them through multiple stages:

Lexical Analysis (Scanner)

Breaks source code into tokens such as:

Keywords

Identifiers

Numbers

Operators

Symbols

String literals

Syntax Analysis (Parser)

Builds a parse tree based on the language grammar and validates program structure.

Semantic Analysis

Performs:

Symbol table generation

Variable declaration validation

Type checking

Scope validation

Duplicate identifier detection

Error Handling

Provides meaningful compile-time error messages with line tracking for easier debugging.

Language Features

DR currently supports:

Variable declarations

Primitive data types

Arithmetic operations

Conditional statements

Loops

Functions

Nested scopes

Custom syntax rules

.dr source files

Technologies Used

C#

.NET

Object-Oriented Programming

Compiler Design

Data Structures

Parsing Algorithms

Tokenization

Abstract Syntax Trees

Symbol Tables

Why This Project Matters

Building a programming language from scratch demonstrates strong knowledge in:

Problem Solving

System Design

Algorithm Design

Language Theory

Low-level software architecture

This project reflects the ability to design complex software systems beyond traditional application development.

Future Enhancements

Abstract Syntax Tree Visualization

Intermediate Code Generation

Bytecode Generation

Optimization Passes

GUI-based IDE for DR Language

Syntax Highlighting

Debugger Integration