Merge pull request #19137 from asuto15/highlight-extern-crate

fix: highlight `extern crate` in doc comments

Author: Veykril

src/tools/rust-analyzer/crates/ide/src/syntax_highlighting/highlight.rs

@@ -703,6 +703,7 @@ fn highlight_name_ref_by_syntax(
     };
 
     match parent.kind() {
+        EXTERN_CRATE => HlTag::Symbol(SymbolKind::Module) | HlMod::CrateRoot,
         METHOD_CALL_EXPR => ast::MethodCallExpr::cast(parent)
             .and_then(|it| highlight_method_call(sema, krate, &it, edition))
             .unwrap_or_else(|| SymbolKind::Method.into()),

src/tools/rust-analyzer/crates/ide/src/syntax_highlighting/test_data/highlight_doctest.html

@@ -50,6 +50,15 @@
 <span class="comment documentation">//!</span><span class="comment documentation"> </span><span class="keyword injected">fn</span><span class="none injected"> </span><span class="function declaration injected">test</span><span class="parenthesis injected">(</span><span class="parenthesis injected">)</span><span class="none injected"> </span><span class="brace injected">{</span><span class="brace injected">}</span>
 <span class="comment documentation">//! ```</span>
 
+<span class="comment documentation">//! ```rust</span>
+<span class="comment documentation">//!</span><span class="comment documentation"> </span><span class="keyword injected">extern</span><span class="none injected"> </span><span class="keyword injected">crate</span><span class="none injected"> </span><span class="self_keyword crate_root injected">self</span><span class="semicolon injected">;</span>
+<span class="comment documentation">//!</span><span class="comment documentation"> </span><span class="keyword injected">extern</span><span class="none injected"> </span><span class="keyword injected">crate</span><span class="none injected"> </span><span class="module crate_root injected">std</span><span class="semicolon injected">;</span>
+<span class="comment documentation">//!</span><span class="comment documentation"> </span><span class="keyword injected">extern</span><span class="none injected"> </span><span class="keyword injected">crate</span><span class="none injected"> </span><span class="module crate_root injected">core</span><span class="semicolon injected">;</span>
+<span class="comment documentation">//!</span><span class="comment documentation"> </span><span class="keyword injected">extern</span><span class="none injected"> </span><span class="keyword injected">crate</span><span class="none injected"> </span><span class="module crate_root injected">alloc</span><span class="semicolon injected">;</span>
+<span class="comment documentation">//!</span><span class="comment documentation"> </span><span class="keyword injected">extern</span><span class="none injected"> </span><span class="keyword injected">crate</span><span class="none injected"> </span><span class="module crate_root injected">proc_macro</span><span class="semicolon injected">;</span>
+<span class="comment documentation">//!</span><span class="comment documentation"> </span><span class="keyword injected">extern</span><span class="none injected"> </span><span class="keyword injected">crate</span><span class="none injected"> </span><span class="module crate_root injected">test</span><span class="semicolon injected">;</span>
+<span class="comment documentation">//!</span><span class="comment documentation"> </span><span class="keyword injected">extern</span><span class="none injected"> </span><span class="keyword injected">crate</span><span class="none injected"> </span><span class="module crate_root injected">Krate</span><span class="semicolon injected">;</span>
+<span class="comment documentation">//! ```</span>
 <span class="keyword">mod</span> <span class="module declaration">outline_module</span><span class="semicolon">;</span>
 
 <span class="comment documentation">/// ```</span>

src/tools/rust-analyzer/crates/ide/src/syntax_highlighting/tests.rs

@@ -722,6 +722,15 @@ fn test_highlight_doc_comment() {
 //! fn test() {}
 //! ```
 
+//! ```rust
+//! extern crate self;
+//! extern crate std;
+//! extern crate core;
+//! extern crate alloc;
+//! extern crate proc_macro;
+//! extern crate test;
+//! extern crate Krate;
+//! ```
 mod outline_module;
 
 /// ```