| 37 | |
| 38 | impl TypeChecker<'_> { |
| 39 | pub(crate) fn definition( |
| 40 | &mut self, |
| 41 | expected: &TypeDef, |
| 42 | actual: Option<&Definition>, |
| 43 | ) -> Result<()> { |
| 44 | match *expected { |
| 45 | TypeDef::Module(t) => match actual { |
| 46 | Some(Definition::Module(actual)) => self.module(&self.types[t], actual), |
| 47 | Some(actual) => bail!("expected module found {}", actual.desc()), |
| 48 | None => bail!("module implementation is missing"), |
| 49 | }, |
| 50 | TypeDef::ComponentInstance(t) => match actual { |
| 51 | Some(Definition::Instance(actual)) => self.instance(&self.types[t], Some(actual)), |
| 52 | None => self.instance(&self.types[t], None), |
| 53 | Some(actual) => bail!("expected instance found {}", actual.desc()), |
| 54 | }, |
| 55 | TypeDef::ComponentFunc(t) => match actual { |
| 56 | Some(Definition::Func(actual)) => self.func(t, actual), |
| 57 | Some(actual) => bail!("expected function found {}", actual.desc()), |
| 58 | None => bail!("function implementation is missing"), |
| 59 | }, |
| 60 | TypeDef::Component(_) => match actual { |
| 61 | Some(actual) => bail!("expected component found {}", actual.desc()), |
| 62 | None => bail!("component implementation is missing"), |
| 63 | }, |
| 64 | TypeDef::Interface(_) => match actual { |
| 65 | Some(actual) => bail!("expected type found {}", actual.desc()), |
| 66 | None => bail!("type implementation is missing"), |
| 67 | }, |
| 68 | |
| 69 | TypeDef::Resource(i) => { |
| 70 | let i = self.types[i].unwrap_concrete_ty(); |
| 71 | let actual = match actual { |
| 72 | Some(Definition::Resource(actual, _dtor)) => actual, |
| 73 | |
| 74 | // If a resource is imported yet nothing was supplied then |
| 75 | // that's only successful if the resource has itself |
| 76 | // already been defined. If it's already defined then that |
| 77 | // means that this is an `(eq ...)` import which is not |
| 78 | // required to be satisfied via `Linker` definitions in the |
| 79 | // Wasmtime API. |
| 80 | None if self.imported_resources.get(i).is_some() => return Ok(()), |
| 81 | |
| 82 | Some(actual) => bail!("expected resource found {}", actual.desc()), |
| 83 | None => bail!("resource implementation is missing"), |
| 84 | }; |
| 85 | |
| 86 | match self.imported_resources.get(i) { |
| 87 | // If `i` hasn't been pushed onto `imported_resources` yet |
| 88 | // then that means that it's the first time a new resource |
| 89 | // was introduced, so record the type of this resource. It |
| 90 | // should always be the case that the next index assigned |
| 91 | // is equal to `i` since types should be checked in the |
| 92 | // same order they were assigned into the `Component` type. |
| 93 | // |
| 94 | // Note the `get_mut` here which is expected to always |
| 95 | // succeed since `imported_resources` has not yet been |
| 96 | // cloned. |