v0.4.2

CodeNothing Programming Language Interpreter v0.4.2 Changelog

[v0.4.2] - 2025-07-24

🚀 Major New Feature

• Lambda Expression Support: Added complete lambda expressions and functional programming capabilities
  • Single-parameter lambda: x => x * 2
  • Multi-parameter lambda: (x, y) => x + y
  • Lambda block: (x) => { statements }
  • Function type: fn(int, int) -> int

✨ Functional Programming Features

• Higher-Order Functions: Support for array.map(), array.filter(), array.reduce(), array.forEach()
• Function Value Reference: Functions can be passed and called as values
• Type Inference: Lambda parameters support auto type inference
• Chaining Operations: Support for functional programming chaining style

🔧 Technical Implementation

• AST Extension: Added Lambda, LambdaBlock, FunctionValue expression types
• Type System: Added Type::Function type support
• Value System: Added Lambda, LambdaBlock, FunctionReference value types
• Lexical Analysis: Added => operator support
• Parser: Smart lambda parameter list detection and parsing
• Interpreter: Complete lambda execution environment and function application mechanism

📝 Syntax Examples

// Basic lambda expressions  
double : fn(int) -> int = x => x * 2;  
add : fn(int, int) -> int = (x, y) => x + y;  

// Array functional programming  
numbers : array<int> = [1, 2, 3, 4, 5];  
evens : array<int> = numbers.filter(x => x % 2 == 0);  
squares : array<int> = numbers.map(x => x * x);  
sum : int = numbers.reduce((acc, x) => acc + x, 0);  

// Higher-order functions  
fn processArray(arr : array<int>, processor : fn(int) -> int) : array<int> {  
    return arr.map(processor);  
}  

🎯 Compatibility

• Fully Backward Compatible: No impact on existing code
• Gradual Adoption: Lambdas can be introduced progressively
• Type Safety: Perfect integration with existing type system

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CodeNothing 编程语言解释器 v0.4.2 更新日志

[v0.4.2] - 2025-07-24

🚀 重大新功能

• Lambda表达式支持: 添加完整的Lambda表达式和函数式编程功能
  • 单参数Lambda: x => x * 2
  • 多参数Lambda: (x, y) => x + y
  • Lambda块: (x) => { statements }
  • 函数类型: fn(int, int) -> int

✨ 函数式编程特性

• 高阶函数: 支持array.map()、array.filter()、array.reduce()、array.forEach()
• 函数值引用: 支持将函数作为值传递和调用
• 类型推断: Lambda参数支持auto类型推断
• 链式操作: 支持函数式编程的链式调用风格

🔧 技术实现

• AST扩展: 新增Lambda、LambdaBlock、FunctionValue等表达式类型
• 类型系统: 新增Type::Function函数类型支持
• Value系统: 新增Lambda、LambdaBlock、FunctionReference值类型
• 词法分析: 新增=>操作符支持
• 解析器: 智能Lambda参数列表检测和解析
• 解释器: 完整的Lambda执行环境和函数应用机制

📝 语法示例

// 基础Lambda表达式  
double : fn(int) -> int = x => x * 2;  
add : fn(int, int) -> int = (x, y) => x + y;  

// 数组函数式编程  
numbers : array<int> = [1, 2, 3, 4, 5];  
evens : array<int> = numbers.filter(x => x % 2 == 0);  
squares : array<int> = numbers.map(x => x * x);  
sum : int = numbers.reduce((acc, x) => acc + x, 0);  

// 高阶函数  
fn processArray(arr : array<int>, processor : fn(int) -> int) : array<int> {  
    return arr.map(processor);  
}  

🎯 兼容性

• 完全向后兼容: 不影响现有代码
• 渐进式采用: 可以逐步引入Lambda表达式
• 类型安全: 与现有类型系统完美集成

Full Changelog: CodeNothingCommunity/CodeNothing@v0.4.1...v0.4.2