8ae655687a
Second slice of the re-architecture — the compiler now has ZERO type- construction code beyond declare/define. - instantiateTypeFunction: a type-fn body returning a computed Type (a call to a non-generic, bodied, Type-returning fn) is comptime-evaluated with the type bindings active, then renamed to the mangled instantiation name for identity (renameNominalType). Replaces the old reify-call pattern-matching. - DELETED: reifyType (lower/nominal.zig), findReturnReifyCall (lower/generic.zig), and the stale inline-position reify gate in resolveTypeCallWithBindings. - evalComptimeType (was evalComptimeTypeNamed): pure eval, no rename; the type-fn caller renames explicitly. renameReifiedType → renameNominalType. - The TYPE NAME now travels in the data: EnumInfo gains `name`, and define() names the slot from it (the compiler derives no name from a binding LHS). examples/0614/0615 carry `name = "..."`; RecvResult/TryResult set it too. - field_type stays a reflection #builtin (reads a type); only construction moved out. All reify mentions stripped from compiler source. examples 0614/0615/0617 run on the floor. Full suite green (673).
35 lines
1.2 KiB
Plaintext
35 lines
1.2 KiB
Plaintext
// REIFY Phase 1: a type-fn that RETURNS `reify(...)` must memoize by the
|
|
// instantiation's mangled name, so `Box(i64)` resolved at two INDEPENDENT sites
|
|
// (here: a return type and a parameter type) is ONE `TypeId`. A value built at
|
|
// one site is therefore assignable / matchable at the other — nominal identity
|
|
// (Contract 1). If the reify result were not registered under the mangled
|
|
// instantiation name, the two sites would mint distinct types and
|
|
// `consume(build())` would be a type error.
|
|
#import "modules/std.sx";
|
|
#import "modules/std/meta.sx";
|
|
|
|
Box :: ($T: Type) -> Type {
|
|
return reify(.enum(.{ name = "Box", variants = .[
|
|
EnumVariant.{ name = "some", payload = T },
|
|
EnumVariant.{ name = "none", payload = void },
|
|
] }));
|
|
}
|
|
|
|
build :: () -> Box(i64) { // site A resolves Box(i64)
|
|
return Box(i64).some(7);
|
|
}
|
|
|
|
consume :: (b: Box(i64)) { // site B resolves Box(i64) independently
|
|
if b == {
|
|
case .some: (n) { print("some {}\n", n); }
|
|
case .none: { print("none\n"); }
|
|
}
|
|
}
|
|
|
|
main :: () -> i32 {
|
|
consume(build()); // typechecks ONLY if site A == site B
|
|
b : Box(i64) = .none;
|
|
consume(b);
|
|
return 0;
|
|
}
|