Merge #4925

4925: Syntax highlighting for escape sequences in strings r=matklad a=ltentrup

I have added a new semantic token type `ESCAPE_SEQUENCE` as the LSP specification does not seem to have an appropriate token type. This may actually be a regression for some users, as the TextMate Rust grammar has a scope `constant.character.escape.rust` which highlights escape sequences (which caused problems with semantic highlighting, see #4138).

Fixes #2604.

Co-authored-by: Leander Tentrup <[email protected]>

1 files changed, 2 insertions, 0 deletions

diff --git a/crates/ra_ide/src/syntax_highlighting/tags.rs b/crates/ra_ide/src/syntax_highlighting/tags.rs
index 94f466966..400d22fb6 100644
--- a/crates/ra_ide/src/syntax_highlighting/tags.rs
+++ b/crates/ra_ide/src/syntax_highlighting/tags.rs
@@ -23,6 +23,7 @@ pub enum HighlightTag {
     Constant,
     Enum,
     EnumVariant,
+    EscapeSequence,
     Field,
     FormatSpecifier,
     Function,
@@ -71,6 +72,7 @@ impl HighlightTag {
             HighlightTag::Constant => "constant",
             HighlightTag::Enum => "enum",
             HighlightTag::EnumVariant => "enum_variant",
+            HighlightTag::EscapeSequence => "escape_sequence",
             HighlightTag::Field => "field",
             HighlightTag::FormatSpecifier => "format_specifier",
             HighlightTag::Function => "function",