Merge #1319

1319: Rainbow highlighting spike 🌈 r=killercup a=killercup

Very simple approach: For each identifier, set the hash of the range
where it's defined as its 'id' and use it in the VSCode extension to
generate unique colors.

Thus, the generated colors are per-file. They are also quite fragile,
and I'm not entirely sure why. Looks like we need to make sure the
same ranges aren't overwritten by a later request?

Co-authored-by: Pascal Hertleif <[email protected]>

1 files changed, 7 insertions, 1 deletions

diff --git a/crates/ra_syntax/src/syntax_text.rs b/crates/ra_syntax/src/syntax_text.rs
index b013164c4..c9038cd5c 100644
--- a/crates/ra_syntax/src/syntax_text.rs
+++ b/crates/ra_syntax/src/syntax_text.rs
@@ -1,6 +1,6 @@
 use std::{fmt, ops::{self, Bound}};
 
-use crate::{SyntaxNode, TextRange, TextUnit, SyntaxElement};
+use crate::{SmolStr, SyntaxNode, TextRange, TextUnit, SyntaxElement};
 
 #[derive(Clone)]
 pub struct SyntaxText<'a> {
@@ -34,6 +34,12 @@ impl<'a> SyntaxText<'a> {
         self.chunks().collect()
     }
 
+    pub fn to_smol_string(&self) -> SmolStr {
+        // FIXME: use `self.chunks().collect()` here too once
+        // https://github.com/matklad/smol_str/pull/12 is merged and published
+        self.to_string().into()
+    }
+
     pub fn contains(&self, c: char) -> bool {
         self.chunks().any(|it| it.contains(c))
     }