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, 11 insertions, 0 deletions

diff --git a/crates/ra_analysis/src/extend_selection.rs b/crates/ra_analysis/src/extend_selection.rs
new file mode 100644
index 000000000..5e1fbee18
--- /dev/null
+++ b/crates/ra_analysis/src/extend_selection.rs
@@ -0,0 +1,11 @@
+use ra_db::SyntaxDatabase;
+
+use crate::{
+    TextRange, FileRange,
+    db::RootDatabase,
+};
+
+pub(crate) fn extend_selection(db: &RootDatabase, frange: FileRange) -> TextRange {
+    let file = db.source_file(frange.file_id);
+    ra_editor::extend_selection(&file, frange.range).unwrap_or(frange.range)
+}