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use super::*; pub trait ImportReceiver { fn receive(&mut self, name: &ImportedName); fn import_all<T>(&mut self, sources: &Vec<T>) where T: Imports, Self: Sized, { for source in sources { source.imports(self); } } } pub trait Imports { fn imports<I>(&self, receiver: &mut I) where I: ImportReceiver; } impl Imports for Name { fn imports<I>(&self, receiver: &mut I) where I: ImportReceiver, { match *self { Name::Imported(ref imported) => receiver.receive(imported), _ => {} }; } } impl Imports for Variable { fn imports<I>(&self, receiver: &mut I) where I: ImportReceiver, { match *self { Variable::Statement(ref stmt) => { stmt.imports(receiver); } Variable::Name(ref name) => { name.imports(receiver); } _ => {} } } } impl Imports for Statement { fn imports<I>(&self, receiver: &mut I) where I: ImportReceiver, { receiver.import_all(&self.parts); } } impl Imports for Element { fn imports<I>(&self, receiver: &mut I) where I: ImportReceiver, { match *self { Push(ref statement) => { statement.imports(receiver); } Inner(ref elements) => { receiver.import_all(elements); } Nested(ref element) => { element.imports(receiver); } _ => {} }; } } impl Imports for FunctionSpec { fn imports<I>(&self, receiver: &mut I) where I: ImportReceiver, { receiver.import_all(&self.arguments); self.elements.imports(receiver); } } impl Imports for Elements { fn imports<I>(&self, receiver: &mut I) where I: ImportReceiver, { receiver.import_all(&self.elements); } }