Core Language Basic Types (Int, Bool, String, Double, Char) ✅ Full support for primitive types Expressions (arithmetic, logical, comparison) ✅ Complete expression evaluation Variables (let, let mut) ✅ Immutable and mutable variables Assignment ✅ Variable reassignment and shadowing Multiline strings ✅ #|syntax for multiline string literals String interpolation ✅ {variable} syntax in string literals Type constraints ✅ (value : Type) syntax for explicit typing Control Flow If-else ✅ Conditional expressions For loops ✅ C-style for loops with continue/break While loops ✅ While loop constructs with else clause Loop control ✅ Continue and break statements Guard expressions ✅ guard condition else { action } syntax Is expressions ✅ Pattern matching with 'is' operator Defer expressions ✅ defer statement for cleanup code Return expressions ✅ Early return from functions Raise expressions ✅ Exception throwing with raise Try-catch expressions ✅ Exception handling with try-catch Loop expressions ✅ loop pattern matching with break/continue Functions Function definitions ✅ Named functions with parameters Named parameters ✅ Named and optional parameters Lambda expressions ✅ Anonymous functions (x => x * 2) Closures ✅ Proper closure environment capture Recursive functions ✅ Self-referencing function calls Currying ✅ Higher-order function composition External functions ✅ Integration with external calls Embedded functions ✅ Native function integration Data Structures Arrays ✅ Array creation, indexing, assignment Array methods ✅ length, get, push, pop, contains, slice, concat, join Array boolean methods ✅ any, all operations Array spread syntax ✅ [..array1, ..array2] syntax Array slice operations ✅ arr[start:end], arr[start:], arr[:end] syntax Array augmented assignment ✅ arr[i] += value, arr[i] *= value syntax Tuples ✅ Tuple creation, access, destructuring Structs ✅ Custom data types with methods Mutable struct fields ✅ Field mutation support Nested struct references ✅ Reference semantics for nested structures Record update syntax ✅ { ..record, field: new_value } syntax Map literals ✅ { "key": value } syntax for map creation Pattern Matching Basic patterns ✅ Constants, variables, wildcards Tuple patterns ✅ Destructuring tuples Array patterns ✅ Array destructuring Record patterns ✅ Struct field matching Range patterns ✅ Range expressions (_..<x, 'a'..='z') Constructor patterns ✅ Constant constructor matching Or patterns ✅ Multiple pattern alternatives Nested patterns ✅ Complex nested pattern matching Enums and Generics Basic enums ✅ Simple enumeration types Enums with data ✅ Algebraic data types Enum pattern matching ✅ Pattern matching on enum variants Generic types ✅ Generic enums and functions Generic functions ✅ Polymorphic function definitions Option Type Option basics ✅ Some/None construction Option pattern matching ✅ Pattern matching on Option Option methods ✅ unwrap, unwrap_or, is_empty, map, filter Built-in Methods Bool methods ✅ compare, default Int methods ✅ Bitwise ops, comparisons, bit manipulation String methods ✅ length, get, unsafe_get, to_string Double methods ✅ compare, to_int64 Char methods ✅ compare, to_int Advanced Features Type system ✅ Basic type checking and inference Static method calls ✅ Class::method() syntax Pipe operator ✅ |> operator for function chaining Function aliases ✅ Alias support (e.g., not for %bool_not) Cross-package method calls ✅ Method calls across different packages Error handling ✅ Result type error handling Group expressions ✅ Parenthesized expressions for precedence For-in loops ✅ Iterator-based loops Iterator methods ✅ iter, map, filter, reduce, for_each Nested iteration ✅ Complex nested loop structures Iterator control flow ✅ break/continue in iterator contexts Package System Module imports ✅ @package.function syntax Cross-package types ✅ Using types from other packages Built-in packages ✅ @int, @math, @bigint, @cmp, @list support Package method calling ✅ Method calls across package boundaries IO and FFI Print functions ✅ println and print support Embedded functions ✅ Native function integration via FFI External function binding ✅ Custom function registration Sorting and Collections List sorting ✅ Built-in sort methods for collections Array sorting ✅ Sorting operations on arrays Collection methods ✅ Comprehensive collection manipulation Comparison Operations Equality operators ✅ == and != operators Relational operators ✅ <, >, <=, >= operators Type-aware comparison ✅ Proper type checking in comparisons Constructor Patterns Single argument matching ✅ Constructor pattern with single args Named field matching ✅ Constructor patterns with named fields Wildcard patterns ✅ _ patterns in constructor matching Functional Programming Higher-order functions ✅ Functions as first-class values Function composition ✅ Combining functions effectively Closure environments ✅ Proper variable capture in closures Literal Overloading Numeric literal overloading ✅ Automatic conversion between numeric types Character literal overloading ✅ Char to Int conversion in pattern matching String literal overloading ✅ String to Bytes conversion Array literal overloading ✅ Array to various types (Bytes, String) conversion Double literal overloading ✅ Double to Float precision conversion Map literal overloading ✅ Map to Json object conversion Complex overloading scenarios ✅ Multi-step type conversions Traits 🟡 Interface definitions Trait as expressions 🟡 (value as Trait) syntax for trait casting Packages 🟡 Module system with @package.function syntax (no trait, trait derive, operator overloading) Attribute #alias ✅ Function alias #external ❌ External function binding #callsite ❌ Call site information #skip ❌ Skipping compilation of a function #cfg ❌ Conditional compilation based on configuration Not Yet Supported Async/await ❌ Asynchronous programming