Merge #350

350: Super simple macro support r=matklad a=matklad

Super simple support for macros, mostly for figuring out how to fit them into the current architecture. Expansion is hard-coded and string based (mid-term, we should try to copy-paste macro-by-example expander from rustc). 

Ideally, we should handle

* highlighting inside the macro (done)
* extend selection inside the macro 
* completion inside the macro
* indexing structs, produced by the macro

Co-authored-by: Aleksey Kladov <[email protected]>

1 files changed, 7 insertions, 1 deletions

diff --git a/crates/ra_db/src/lib.rs b/crates/ra_db/src/lib.rs
index 3028db17c..7181f2950 100644
--- a/crates/ra_db/src/lib.rs
+++ b/crates/ra_db/src/lib.rs
@@ -8,7 +8,7 @@ pub mod mock;
 use std::sync::Arc;
 
 use ra_editor::LineIndex;
-use ra_syntax::{TextUnit, SourceFileNode};
+use ra_syntax::{TextUnit, TextRange, SourceFileNode};
 
 pub use crate::{
     cancelation::{Canceled, Cancelable},
@@ -70,3 +70,9 @@ pub struct FilePosition {
     pub file_id: FileId,
     pub offset: TextUnit,
 }
+
+#[derive(Clone, Copy, Debug)]
+pub struct FileRange {
+    pub file_id: FileId,
+    pub range: TextRange,
+}