66bdc70bf1
Move examples/*.sx and their expected/ snapshots into per-category subfolders (examples/<category>/...). Folder = leading filename token, with ffi-objc/ffi-jni kept whole; filenames are unchanged. The corpus runner and LSP sweep now discover each category's expected/ dir, while issues/ stays flat. Example 1058's repo-root-relative companion import is made file-relative. Path strings embedded in 164 snapshots were regenerated (path-only changes). Test-layout docs in CLAUDE.md updated.
69 lines
3.7 KiB
Plaintext
69 lines
3.7 KiB
Plaintext
// The comptime-int COUNT surface is uniform: every count consumer — array
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// dimension (direct `[N]T` and via type alias), `Vector` lane, generic
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// value-param (struct AND type-fn binder), and `inline for 0..N` — folds the
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// SAME leaf forms to the SAME value through one shared evaluator
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// (`program_index.evalConstIntExpr` / `moduleConstInt`). The leaf forms
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// exercised here: untyped int const (`M`), a named const with an EXPRESSION RHS
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// (`N :: M + 1`), a typed-int const (`S : i64 : 5`), an integral float const
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// (`F :: 4.0` ≡ 4), and an ALIASED integer constraint (`Count :: u32`,
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// `Small :: i8`) on a value-param.
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//
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// Regression (issue 0083): two cells of this surface diverged from the rest.
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// (1) A named const whose RHS is an expression (`N :: M + 1`) did not fold as a
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// count ("not a compile-time integer constant") — `moduleConstInt` read only a
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// literal RHS; it now folds the RHS through the shared `evalConstIntExpr`. (2) An
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// aliased integer constraint (`$K: Count`) bypassed the value-param range gate,
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// which only matched builtin constraint names; the constraint now resolves to
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// its underlying builtin before range-checking, so `$K: Count` behaves exactly
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// like `$K: u32`.
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#import "modules/std.sx";
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M :: 2; // untyped int const
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N :: M + 1; // named const, EXPRESSION RHS (== 3)
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S : i64 : 5; // typed-int const
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KU : u32 : 3; // typed-u32 const
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F :: 4.0; // integral float const (== 4)
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Count :: u32; // integer ALIAS — value-param constraint
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Small :: i8; // integer ALIAS — value-param constraint
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ArrN :: [N]i64; // array dim via alias: expression const (3)
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ArrF :: [F]i64; // array dim via alias: integral float (4)
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ArrS :: [S]i64; // array dim via alias: typed const (5)
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Buf :: struct ($K: u32, $T: Type) { data: [K]T; }
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BufC :: struct ($K: Count, $T: Type) { data: [K]T; } // ALIASED u32 constraint
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BufS :: struct ($K: Small, $T: Type) { data: [K]T; } // ALIASED i8 constraint
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Make :: ($K: u32, $T: Type) -> Type { return [K]T; } // type-fn value-param
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main :: () {
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// array dimension — DIRECT
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a : [N]i64 = ---; a[0] = 7; a[2] = 9;
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print("dim.direct.expr: len={} a0={} a2={}\n", a.len, a[0], a[2]);
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f : [F]i64 = ---; f[3] = 40;
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print("dim.direct.float: len={} f3={}\n", f.len, f[3]);
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// array dimension — via type ALIAS
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aa : ArrN = ---; aa[2] = 99; print("dim.alias.expr: len={} aa2={}\n", aa.len, aa[2]);
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af : ArrF = ---; print("dim.alias.float: len={}\n", af.len);
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az : ArrS = ---; print("dim.alias.typed: len={}\n", az.len);
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// Vector lane — expression const (3) and integral float (4)
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v3 : Vector(N, f32) = .[1.0, 2.0, 3.0];
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print("lane.expr3: {} {} {}\n", v3.x, v3.y, v3.z);
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v4 : Vector(F, f32) = .[1.0, 2.0, 3.0, 4.0];
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print("lane.float4: {}\n", v4.w);
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// generic value-param — struct binder: expr const, aliased u32, aliased i8
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bn : Buf(N, i64) = ---; bn.data[2] = 30; print("vp.struct.expr: len={} v={}\n", bn.data.len, bn.data[2]);
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bc : BufC(KU, i64) = ---; bc.data[2] = 31; print("vp.struct.alias.u32: len={} v={}\n", bc.data.len, bc.data[2]);
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bs : BufS(4, i64) = ---; bs.data[3] = 32; print("vp.struct.alias.i8: len={} v={}\n", bs.data.len, bs.data[3]);
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// generic value-param — type-fn binder: expr const
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mk : Make(N, i64) = ---; mk[2] = 33; print("vp.typefn.expr: len={} v={}\n", mk.len, mk[2]);
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// inline-for bound — expr const (3) and integral float (4)
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s := 0; inline for 0..N (i) { s += i; } print("for.expr: {}\n", s); // 0+1+2 = 3
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t := 0; inline for 0..F (i) { t += i; } print("for.float: {}\n", t); // 0+1+2+3 = 6
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}
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