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Release Notes - v0.2.x Series

Version 0.2.0 - Enhanced TypeScript Support & Core Features

Released: 2025-01-06

Overview

Version 0.2.0 focused on expanding TypeScript language support with advanced control flow, enhanced class features, and comprehensive testing infrastructure.

Major Features

Control Flow Enhancements

For loops: Classic for, for...of, and for...in loops with proper scoping
While/Do-While loops: Complete loop support with break/continue
Switch statements: Full switch/case/default with fall-through semantics
Enhanced conditionals: Ternary operators and complex boolean expressions

Class System Improvements

Constructor support: Proper constructor generation with parameter lists
Method implementations: Instance and static methods with correct binding
Property declarations: Public, private, protected member variables
This binding: Correct this context in methods and arrow functions
Class expressions: Support for anonymous class expressions

Expression Handling

Binary operators: Full arithmetic, logical, and comparison operators
Unary operators: ++, --, !, ~, typeof, void, delete
Assignment operators: +=, -=, *=, /=, %=, etc.
Logical operators: &&, ||, ?? with short-circuit evaluation
Member access: Property access with dots and brackets
Call expressions: Function and method calls with arguments

Type System Foundation

Basic type annotations: string, number, boolean, any, void
Array types: T[] and Array syntax support
Object types: Interface and type alias foundations
Function types: Parameter and return type annotations
Union types: Basic union type support (string | number)

Testing Infrastructure

Spec-based testing: BDD-style test specifications
Test categories: Organized tests by feature area
Coverage tracking: Code coverage metrics and reporting
E2E test framework: End-to-end transpilation testing

Code Quality

Linting rules: Comprehensive ESLint configuration
Format standards: Consistent code formatting with deno fmt
Type checking: Strict TypeScript checking enabled
CI/CD pipeline: GitHub Actions for automated testing

Bug Fixes

Fixed variable scoping in nested blocks
Resolved issues with operator precedence
Corrected string literal escaping
Fixed array initialization problems
Resolved class member access issues

Breaking Changes

Changed IR node structure for better type representation
Modified code generator API for extensibility
Updated transformer interface for plugin support

Known Issues

Arrow functions in class properties need refinement
Some edge cases in switch statement fall-through
Complex union types not fully supported

Version 0.2.1 - Bug Fixes & Stability

Released: 2025-01-08

Improvements

Enhanced error messages with line numbers
Better handling of edge cases in loops
Improved memory management for class instances
Optimized code generation for expressions

Bug Fixes

Fixed nested class compilation issues
Resolved problems with method overloading
Corrected array method implementations
Fixed string concatenation edge cases

Documentation

Added more code examples
Enhanced API documentation
Improved troubleshooting guide
Updated migration guide from v0.1.x

Version 0.2.2 - Performance & Optimization

Released: 2025-01-10

Performance Improvements

30% faster transpilation for large files
Reduced memory usage during compilation
Optimized IR tree traversal
Improved code generation efficiency

Features

Added basic source map support
Enhanced debugging information
Better error recovery during parsing
Improved type inference for literals

Bug Fixes

Fixed memory leaks in transformer
Resolved circular dependency issues
Corrected operator precedence bugs
Fixed edge cases in type resolution

Developer Experience

Better error messages with suggestions
Enhanced CLI output formatting
Improved progress indicators
Added verbose mode for debugging