Basic C Compiler

A compiler for WLP4 (subset of C) that generates MIPS assembly code.

Architecture

The compiler is organized into modular components with clean interfaces:

WLP4 Source Code
      ↓
   [Scan] → Tokens
      ↓
   [Parse] → Parse Tree
      ↓
   [Type] → Typed Parse Tree
      ↓
   [Gen] → MIPS Assembly
      ↓
   [Asm] → Final MIPS Code

Components

• scan.cc/h: Lexical analysis (tokenization)
• parse.cc/h: Syntax analysis (parsing)
• type.cc/h: Semantic analysis (type checking)
• gen.cc/h: Code generation (MIPS assembly)
• asm.cc/h: Assembler (MIPS code processing)
• main.cc: Main compiler driver

Building

make clean
make

This produces a single wlp4 executable.

Usage

./wlp4 < input.wlp4 > output.mips

Or compile from source:

cat my_program.wlp4 | ./wlp4 > my_program.mips

Example WLP4 Program

int wain(int a, int b) {
    return a + b;
}

Development

Each module exports clean functions:

• scanTokens(string) → vector
• buildParseTree(tokens) → ParseNode*
• typeCheck(parseTree) → string
• generateCode(typedTree) → string
• assemble(assembly) → string

This modular design makes it easy to test individual stages and extend the compiler.

Clean Up

make clean

Removes all build artifacts.