Refactor primary IDE API

This introduces the new type -- Semantics.
Semantics maps SyntaxNodes to various semantic info, such as type,
name resolution or macro expansions.

To do so, Semantics maintains a HashMap which maps every node it saw
to the file from which the node originated. This is enough to get all
the necessary hir bits just from syntax.

1 files changed, 6 insertions, 2 deletions

diff --git a/crates/ra_ide/src/display/navigation_target.rs b/crates/ra_ide/src/display/navigation_target.rs
index c9d0058a6..5afb23764 100644
--- a/crates/ra_ide/src/display/navigation_target.rs
+++ b/crates/ra_ide/src/display/navigation_target.rs
@@ -1,7 +1,7 @@
 //! FIXME: write short doc here
 
 use either::Either;
-use hir::{AssocItem, FieldSource, HasSource, InFile, ModuleSource};
+use hir::{original_range, AssocItem, FieldSource, HasSource, InFile, ModuleSource};
 use ra_db::{FileId, SourceDatabase};
 use ra_ide_db::RootDatabase;
 use ra_syntax::{
@@ -11,7 +11,11 @@ use ra_syntax::{
     TextRange,
 };
 
-use crate::{expand::original_range, references::NameDefinition, FileSymbol};
+use crate::{
+    // expand::original_range,
+    references::NameDefinition,
+    FileSymbol,
+};
 
 use super::short_label::ShortLabel;