From 157069e2325f3b4b5cc91a403f63cf1497d56349 Mon Sep 17 00:00:00 2001
From: Jake Heinz <jh@discordapp.com>
Date: Tue, 2 May 2023 07:16:25 +0000
Subject: [PATCH] fix: ide: do not highlight escapes in raw strings

---
 crates/ide/src/syntax_highlighting.rs                        | 5 ++++-
 .../src/syntax_highlighting/test_data/highlight_strings.html | 1 +
 crates/ide/src/syntax_highlighting/tests.rs                  | 1 +
 3 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/crates/ide/src/syntax_highlighting.rs b/crates/ide/src/syntax_highlighting.rs
index 5821bb1202..4038136fcd 100644
--- a/crates/ide/src/syntax_highlighting.rs
+++ b/crates/ide/src/syntax_highlighting.rs
@@ -422,7 +422,10 @@ fn traverse(
                         continue;
                     }
                     highlight_format_string(hl, &string, &expanded_string, range);
-                    highlight_escape_string(hl, &string, range.start());
+
+                    if !string.is_raw() {
+                        highlight_escape_string(hl, &string, range.start());
+                    }
                 }
             } else if ast::ByteString::can_cast(token.kind())
                 && ast::ByteString::can_cast(descended_token.kind())
diff --git a/crates/ide/src/syntax_highlighting/test_data/highlight_strings.html b/crates/ide/src/syntax_highlighting/test_data/highlight_strings.html
index d34f5cffbf..4c6d69bc63 100644
--- a/crates/ide/src/syntax_highlighting/test_data/highlight_strings.html
+++ b/crates/ide/src/syntax_highlighting/test_data/highlight_strings.html
@@ -159,6 +159,7 @@ pre                 { color: #DCDCCC; background: #3F3F3F; font-size: 22px; padd
 
     <span class="keyword">let</span> <span class="punctuation">_</span> <span class="operator">=</span> <span class="string_literal">"</span><span class="escape_sequence">\x28</span><span class="escape_sequence">\x28</span><span class="escape_sequence">\x00</span><span class="escape_sequence">\x63</span><span class="escape_sequence">\n</span><span class="string_literal">"</span><span class="semicolon">;</span>
     <span class="keyword">let</span> <span class="punctuation">_</span> <span class="operator">=</span> <span class="string_literal">b"</span><span class="escape_sequence">\x28</span><span class="escape_sequence">\x28</span><span class="escape_sequence">\x00</span><span class="escape_sequence">\x63</span><span class="escape_sequence">\n</span><span class="string_literal">"</span><span class="semicolon">;</span>
+    <span class="keyword">let</span> <span class="punctuation">_</span> <span class="operator">=</span> <span class="string_literal">r"\\"</span><span class="semicolon">;</span>
 
     <span class="macro">println</span><span class="macro_bang">!</span><span class="parenthesis">(</span><span class="string_literal">"</span><span class="format_specifier">{</span><span class="escape_sequence">\x41</span><span class="format_specifier">}</span><span class="string_literal">"</span><span class="comma">,</span> A <span class="operator">=</span> <span class="numeric_literal">92</span><span class="parenthesis">)</span><span class="semicolon">;</span>
     <span class="macro">println</span><span class="macro_bang">!</span><span class="parenthesis">(</span><span class="string_literal">"</span><span class="format_specifier">{</span><span class="variable">ничоси</span><span class="format_specifier">}</span><span class="string_literal">"</span><span class="comma">,</span> ничоси <span class="operator">=</span> <span class="numeric_literal">92</span><span class="parenthesis">)</span><span class="semicolon">;</span>
diff --git a/crates/ide/src/syntax_highlighting/tests.rs b/crates/ide/src/syntax_highlighting/tests.rs
index 12205d47e5..79fef0dcbd 100644
--- a/crates/ide/src/syntax_highlighting/tests.rs
+++ b/crates/ide/src/syntax_highlighting/tests.rs
@@ -505,6 +505,7 @@ fn main() {
 
     let _ = "\x28\x28\x00\x63\n";
     let _ = b"\x28\x28\x00\x63\n";
+    let _ = r"\\";
 
     println!("{\x41}", A = 92);
     println!("{ничоси}", ничоси = 92);