stlib arraylist

LANGUAGE.md

@@ -59,6 +59,7 @@ roadmap and milestone history.
 - explicit comptime type parameters such as `max func($T type, a, b T) T`, specialized by type and omitted from the runtime ABI
 - forced typed comptime expressions such as `$sum(1, 2)`, `$Point { x = 1, y = 2 }`, and comptime value blocks such as `${ yield 4 }`
 - comptime execution for bodyful Brolang functions with mutable locals, loops, `defer`, `match`, `try`/`catch`, pointer/slice storage mutation, pointer captures, and calls through comptime-known function values
+- comptime type factories such as `Box func($T type) type { return struct { value T } }`; calls like `Box(i32)` are concrete nominal types and may appear anywhere a type is expected
 - bodyful `c_func` definitions and bodyless `c_func` declarations with exact external symbol names
 - concrete-only C signatures, C variadic declarations/calls, and C default argument promotions
 - native function pointer values and types with `@func(...) R`, fallible `@func(...) R ! E`, optional `?@func(...) R`, and non-variadic native indirect calls
@@ -74,7 +75,8 @@ roadmap and milestone history.
 
 ### standard packages
 
-- `std/mem` allocator contract with a context pointer plus shared `AllocatorVTable`, raw byte operations `raw_alloc` / `raw_realloc` / `raw_free`, fallible typed `alloc(T, allocator, count)`, and typed `free(T, allocator, memory)`; failed nonzero raw reallocation preserves the original allocation, while zero size frees it
+- `std/mem` allocator contract with raw byte operations, typed `empty` / `alloc` / `realloc` / `free`, overflow checks, zero-sized-type support, and failure-preserving reallocation
+- `std/arraylist` generic `ArrayList(T)` with direct `items` slice access, explicit capacity, allocator ownership, fallible reserve/append, clear, and deinit
 
 ### compiler behavior
 
@@ -91,7 +93,8 @@ roadmap and milestone history.
 - tuples and native Brolang variadic functions
 - exporting Brolang functions to C and broader target-specific C ABI lowering
 - non-plain C record layouts such as bitfields, packed records, flexible arrays, qualified fields, and C variadic record arguments
-- typed heap allocation helpers, arenas, pools, build-mode heap policy, and escaping-allocation diagnostics
+- arenas, pools, build-mode heap policy, and escaping-allocation diagnostics
+- recursive type factories, type reflection, inferred type arguments, and type-producing unions/enums
 - broader Zig-style pointer/result casts beyond V1 `ptr_cast(T, ptr)`
 - sum-type ABI/layout polish, including dynamic tag-width shrinking, all-void channel collapse, and cross-module global-id determinism
 - backed/C enum composition and must-consume fallible linting