introduce ids module

crates/ra_hir/src/lib.rs

@@ -22,6 +22,7 @@ mod path;
 mod arena;
 pub mod source_binder;
 
+mod ids;
 mod macros;
 mod name;
 mod krate;
@@ -46,6 +47,7 @@ pub use self::{
     path::{Path, PathKind},
     name::Name,
     krate::Crate,
+    ids::MFileId,
     macros::{MacroDef, MacroInput, MacroExpansion, MacroCallId, MacroCallLoc},
     module::{Module, ModuleId, Problem, nameres::{ItemMap, PerNs, Namespace}, ModuleScope, Resolution},
     function::{Function, FnScopes},
@@ -55,20 +57,6 @@ pub use self::{
 
 pub use self::function::FnSignatureInfo;
 
-/// An `MFileId` is like a `FileId`, but it can also refer to code generated by
-/// macros.
-#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
-pub enum MFileId {
-    File(FileId),
-    Macro(MacroCallId),
-}
-
-impl From<FileId> for MFileId {
-    fn from(file_id: FileId) -> MFileId {
-        MFileId::File(file_id)
-    }
-}
-
 /// Def's are a core concept of hir. A `Def` is an Item (function, module, etc)
 /// in a specific module.
 #[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]