Zig looks very interesting. There is only TODO in memory section in documentation. From what I understand there is only manual memory management? I've seen there is a mention about custom allocators, any details? Any RAII like concept? or full manual memory management?
Memory is manually managed, yes. We do have defer (as in go) for slightly easier resource management.
Zig doesn't have a default memory allocator. Allocators instead are expected to be passed as an argument to functions as they need them. This makes it trivial to replace an allocator with something custom or use multiple different allocators within a small code block.
A contrived example:
const std = @import("std");
pub fn GiveMeAnInt(alloc: &std.mem.Allocator) -> %&u32 {
return alloc.create(u32);
}
test "using two allocators" {
const int1 = try GiveMeAnInt(std.heap.c_allocator);
*int1 = 2;
// Would usually store the allocator with the type on construction.
defer std.heap.c_allocator.destroy(int1);
const int2 = try GiveMeAnInt(std.debug.global_allocator);
*int2 = 2;
}