Files
sx/examples/0404-protocols-dot-shorthand-protocol-field.sx
agra d8076b9333 lang: rename signed integer types sN -> iN
Surface rename of the signed integer family: s1..s64 become i1..i64
(u1..u64, usize, isize unchanged). 'string' keeps the s-prefix arm in
name classification; width parsing moves to the i-prefix arm next to
isize.

Internal TypeId tags follow the surface (.s8/.s16/.s32/.s64 ->
.i8/.i16/.i32/.i64), as do mono-key mangle fragments (ptr_i64,
tu_i64_bool) and all display/diagnostic formatting (i{d}).

Migrated in the same sweep: stdlib + examples + issue repros + FFI C
companions (shared symbol names like ffi_id_i64), expected
stdout/stderr/ir snapshots, specs.md, readme.md, CLAUDE.md/AGENTS.md,
implementation_plan.md, docs/, issue writeups. Vendored stb_image and
historical flow state left untouched.

zig build test: 426/426; examples suite: 595/595.
2026-06-12 09:31:53 +03:00

80 lines
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// Dot-shorthand `.{ child = d }` for a struct whose first field is a protocol
// value, used as the argument to `List(Container).append` from two distinct
// container types. Exercises the cross-callsite path of dot-shorthand inference.
#import "modules/std.sx";
Drawable :: protocol {
draw :: () -> i32;
name :: () -> string;
layout :: (x: i32) -> i32;
handle :: (event: i32) -> bool;
}
Circle :: struct { radius: i32; }
impl Drawable for Circle {
draw :: (self: *Circle) -> i32 { self.radius }
name :: (self: *Circle) -> string { "circle" }
layout :: (self: *Circle, x: i32) -> i32 { x + self.radius }
handle :: (self: *Circle, event: i32) -> bool { event > 0 }
}
Square :: struct { side: i32; }
impl Drawable for Square {
draw :: (self: *Square) -> i32 { self.side * self.side }
name :: (self: *Square) -> string { "square" }
layout :: (self: *Square, x: i32) -> i32 { x + self.side }
handle :: (self: *Square, event: i32) -> bool { event > 1 }
}
Rect :: struct {
x: f32;
y: f32;
w: f32;
h: f32;
zero :: () -> Rect { Rect.{ x = 0.0, y = 0.0, w = 0.0, h = 0.0 } }
}
Container :: struct {
child: Drawable;
computed_frame: Rect = .zero();
}
// Two different structs, each with List(Container), both calling .append(.{...})
// This mirrors VStack/HStack in the game.
StackA :: struct {
children: List(Container);
add :: (self: *StackA, d: Drawable) {
// BUG: `.{ child = d }` causes LLVM error when 2+ structs do this
self.children.append(.{ child = d });
}
}
StackB :: struct {
children: List(Container);
add :: (self: *StackB, d: Drawable) {
// BUG: second struct doing `.{ child = d }` triggers the error
self.children.append(.{ child = d });
// FIX: explicit `Container.{ child = d }` works
// self.children.append(Container.{ child = d });
}
}
main :: () -> void {
c := Circle.{ radius = 42 };
s := Square.{ side = 5 };
a : StackA = .{};
a.add(c);
print("StackA: draw={}\n", a.children.items[0].child.draw());
b : StackB = .{};
b.add(s);
print("StackB: draw={}\n", b.children.items[0].child.draw());
print("OK\n");
}