d8076b9333
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.
98 lines
2.2 KiB
Plaintext
98 lines
2.2 KiB
Plaintext
#import "modules/std.sx";
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// --- Type declarations ---
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OptNode :: struct { value: i32; next: ?i32; }
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OptInner :: struct { val: i32; }
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OptOuter :: struct { inner: ?OptInner; }
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// --- Comptime optionals ---
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ct_sum :: () -> i32 {
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x: ?i32 = 42;
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y: ?i32 = null;
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return (x ?? 0) + (y ?? 99);
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}
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CT_RESULT :: #run ct_sum();
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main :: () -> i32 {
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// Basic optional creation
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x: ?i32 = 42;
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y: ?i32 = null;
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print("x = {}\n", x);
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print("y = {}\n", y);
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// Force unwrap
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print("x! = {}\n", x!);
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// Null coalescing
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print("x ?? 0 = {}\n", x ?? 0);
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print("y ?? 99 = {}\n", y ?? 99);
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// If-binding (safe unwrap)
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if val := x {
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print("if-bind x: {}\n", val);
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}
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if val := y {
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print("should not print\n");
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} else {
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print("if-bind y: none\n");
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}
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// Pattern matching
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check :: (v: ?i32) -> i32 {
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return if v == {
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case .some: (val) { val }
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case .none: { 0 }
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};
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}
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print("match some: {}\n", check(42));
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print("match none: {}\n", check(null));
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// Optional chaining
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p: ?OptNode = OptNode.{ value = 10, next = 20 };
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q: ?OptNode = null;
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print("p?.value = {}\n", p?.value ?? 0);
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print("q?.value = {}\n", q?.value ?? 0);
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// Deep chaining
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o1 := OptOuter.{ inner = OptInner.{ val = 99 } };
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o2 := OptOuter.{ inner = null };
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print("o1.inner?.val = {}\n", o1.inner?.val ?? 0);
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print("o2.inner?.val = {}\n", o2.inner?.val ?? 0);
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// Flow-sensitive narrowing
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a: ?i32 = 10;
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b: ?i32 = 20;
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if a != null {
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print("narrowed a: {}\n", a);
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}
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// Guard narrowing
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guard :: (v: ?i32) -> i32 {
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if v == null { return 0; }
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return v;
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}
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print("guard 42: {}\n", guard(42));
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print("guard null: {}\n", guard(null));
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// Compound narrowing
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if a != null and b != null {
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print("both: {} {}\n", a, b);
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}
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// Compound guard
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guard2 :: (a: ?i32, b: ?i32) -> i32 {
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if a == null or b == null { return 0; }
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return a + b;
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}
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print("guard2: {}\n", guard2(3, 4));
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// Struct field defaults
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n := OptNode.{ value = 10 };
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print("default next: {}\n", n.next);
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// Comptime result
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print("comptime: {}\n", CT_RESULT);
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return 0;
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}
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