// Inline `xx` cast as the first argument to a struct static method must
// flow the leading param's type into the cast — otherwise an `xx ptr`
// targeting a protocol param falls back to s64 and the call frame is
// corrupted, SIGTRAPping when the body dispatches through the field.
//
// Three call shapes that must all succeed:
//   1. Named-variable receiver: `a : Allocator = xx p; T.init(a, ...)`
//   2. Free function with inline xx: `make_t(xx p, ...)`
//   3. Static method with inline xx: `T.init(xx p, ...)`  ← used to crash

#import "modules/std.sx";
#import "modules/std/mem.sx";

Box :: struct {
    parent: Allocator;
    first_ptr: *void;

    init :: (parent_alloc: Allocator, size: s64) -> *Box {
        self : *Box = xx malloc(size_of(Box));
        self.parent = parent_alloc;
        self.first_ptr = self.parent.alloc(size);
        self
    }
}

make_box :: (parent_alloc: Allocator, size: s64) -> *Box {
    self : *Box = xx malloc(size_of(Box));
    self.parent = parent_alloc;
    self.first_ptr = self.parent.alloc(size);
    self
}

main :: () -> s32 {
    g_gpa : GPA = .{ alloc_count = 0 };

    a : Allocator = xx @g_gpa;
    b1 := Box.init(a, 64);
    print("Box.init (named-var):  ok\n");

    b2 := make_box(xx @g_gpa, 64);
    print("make_box (inline-xx):  ok\n");

    b3 := Box.init(xx @g_gpa, 64);
    print("Box.init (inline-xx):  ok\n");

    0
}