🚀 Visual Compiler Studio

A web-based interactive tool to visualize how a compiler works step-by-step, including:

• 🔍 Lexical Analysis (Tokenization)
• 🧠 Semantic Analysis (Symbol Table)
• ⚙️ Execution Engine (Runtime Simulation)
• 📊 Execution Trace (Step-by-step timeline)

🌟 Highlights

• Built a complete compiler pipeline: Lexer → Parser → Semantic → Executor
• Supports Java-like syntax preprocessing
• Real-time token visualization
• Symbol table generation and memory tracking
• Execution trace timeline
• Monaco Editor integration
• Syntax, semantic, and type validation
• IDE-style resizable workspace

📸 Screenshots

Code Editor

Token Visualization

Symbol Table

Execution Trace

Error Detection

⚠️ Known Limitations

• Not a full Java compiler
• No object-oriented programming support
• No Scanner input support
• No array support
• No inheritance/polymorphism
• Designed primarily for compiler visualization and learning

🚀 Future Scope

• Function and method support
• Array handling
• String operations
• AST (Abstract Syntax Tree) visualization
• Optimization phase visualization
• Intermediate code generation
• Machine code generation simulation

✨ Features

• Monaco Editor: A full VS Code-like editing experience.
• Resizable Output Panel: A draggable divider to manage your workspace (similar to the VS Code terminal).
• Tabbed Visualization:
  • Tokens: View every lexeme categorized by type and line number.
  • Symbol Table: Track variables, their types, and their final memory states.
  • Execution Trace: A chronological replay of every program action.
• Real-time Execution: Immediate feedback on code changes.
• Clean Output: Console results contain ONLY user-defined print results.

☕ Java-like Syntax Support

• This is not a full Java compiler.
• It supports beginner-level Java-like wrapper syntax.
• Boilerplate wrappers like public class Main and public static void main(String[] args) are preprocessed and automatically stripped.
• System.out.println(x) and System.out.print(x) are both preprocessed and treated as standard print statements.
• Supported Syntax: int, float, assignment, arithmetic, if, while, for, ++, --, and print/System.out.println.
• Full advanced Java features such as classes, objects, arrays, methods, imports, Scanner, and string concatenation are not fully supported.

🧪 Sample Input

int a = 10;
a = a + 1;
print a;

✅ Output

11

🧩 Architecture

Lexer → Parser → Semantic → Executor → WebServer → UI

⚙️ How to Run

1. Compile the source:

   javac -d build src/*.java

2. Start the WebServer:

   java -cp build WebServer

3. Access the IDE: Open index.html in your browser or navigate to http://localhost:8080 (if serving locally).

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Visual Compiler Studio - Visualizing the magic behind the code.