v0.2.0

Features:

• Added support for variable declarations with 'let' keyword
• Implemented variable references in expressions
• Added stack allocation for variables using LLVM alloca/store/load instructions
• Support for type inference in variable declarations
• Variables stored in HashMap for scoped access

Improvements:

• Enhanced lexer with new tokens (Let, Assign, Colon, Identifier)
• Extended AST with VarDecl, Assignment, and Variable nodes
• Updated parser with parse_declaration and variable parsing
• Fixed lexer token string bugs (Colon and Assign tokens)
• Fixed pattern matching with proper String to &str conversion

Documentation:

• Removed large Example Output sections from READMEs
• Removed Project Structure sections from documentation
• Started moving file descriptions to source file comments

Full Changelog: v0.1.2...v0.2.0

v0.1.2 - Command-line options support

Features:

• Added command-line options support with CompilerOption enum
• Implemented --verbose/-v flag for detailed compilation output
• Integrated verbose mode throughout the compilation pipeline
• Conditional output for Tokens, AST, and LLVM IR based on verbose flag

Improvements:

• Better argument parsing to separate options from filename
• Cleaner output in non-verbose mode
• Pass options through Compiler and LLVMCompiler constructors
• Fixed all compilation warnings related to options handling

Documentation:

• Updated README with verbose option usage
• Added options.rs to project structure documentation
• Included examples for both default and verbose output modes

Full Changelog: v0.1.1...v0.1.2

v0.1.1 - Modular architecture refactoring

Features:

• Complete modular architecture with compiler.rs orchestrator
• Separated frontend/backend responsibilities
• LLVM backend module (llvm_backend.rs) for code generation
• Improved error handling throughout compilation pipeline
• Fixed all compilation warnings and unused imports
• Organized output to target/llvm directory

Improvements:

• Better separation of concerns between modules
• Cleaner error propagation with Result types

v0.1.0 - Basic Swift compiler with LLVM backend

Features:

• Lexer for tokenizing Swift source code
• Parser with operator precedence for arithmetic expressions
• AST generation
• LLVM IR code generation
• Support for print statements and basic arithmetic (+, -, *, /)
• Native code compilation via LLVM toolchain