#exe {
--name optionals
-Mroot=optionals.zig
#}

#write optionals.zig {
pub fn main() void {
    {
        var null_u32: ?u32 = null;
        var maybe_u32: ?u32 = null;
        var nonnull_u32: ?u32 = 456;
        null_u32 = null_u32;
        maybe_u32 = 123;
        nonnull_u32 = nonnull_u32;
    }
}
#}
#update
#check lldb {
(lldb) breakpoint set --file optionals.zig --source-pattern-regexp 'maybe_u32 = 123;'
Breakpoint 1: where = optionals`optionals.main + #... at optionals.zig:7:9, address = 0x#...
(lldb) process launch
Process #... launched: '#.../optionals' (#...)
Process #... stopped
* thread #1, name = 'optionals', stop reason = breakpoint 1.1
       frame #0: optionals`optionals.main at optionals.zig:7:9
(lldb) frame variable --show-all-children -- null_u32 maybe_u32 nonnull_u32 nonnull_u32.?
(?u32) null_u32 = null
(?u32) maybe_u32 = null
(?u32) nonnull_u32 = (nonnull_u32.? = 456)
(u32) nonnull_u32.? = 456
(lldb) breakpoint delete --force 1
1 breakpoints deleted; 0 breakpoint locations disabled.
(lldb) #---
(lldb) breakpoint set --file optionals.zig --source-pattern-regexp 'nonnull_u32 = nonnull_u32;'
Breakpoint 2: where = optionals`optionals.main + #... at optionals.zig:8:9, address = 0x#...
(lldb) process continue
Process #... resuming
Process #... stopped
* thread #1, name = 'optionals', stop reason = breakpoint 2.1
       frame #0: optionals`optionals.main at optionals.zig:8:9
(lldb) frame variable --show-all-children --show-types -- null_u32 maybe_u32 maybe_u32.? nonnull_u32 nonnull_u32.?
(?u32) null_u32 = null
(?u32) maybe_u32 = {
  (u32) maybe_u32.? = 123
}
(u32) maybe_u32.? = 123
(?u32) nonnull_u32 = {
  (u32) nonnull_u32.? = 456
}
(u32) nonnull_u32.? = 456
(lldb) breakpoint delete --force 2
1 breakpoints deleted; 0 breakpoint locations disabled.
#}