Don't descend MacroCall TokenTree delimiters

Author: Veykril

crates/hir/src/semantics.rs

@@ -17,7 +17,7 @@ use rustc_hash::{FxHashMap, FxHashSet};
 use syntax::{
     algo::find_node_at_offset,
     ast::{self, GenericParamsOwner, LoopBodyOwner},
-    match_ast, AstNode, SyntaxNode, SyntaxNodePtr, SyntaxToken, TextSize,
+    match_ast, AstNode, SyntaxNode, SyntaxNodePtr, SyntaxToken, TextRange, TextSize,
 };
 
 use crate::{
@@ -394,7 +394,15 @@ impl<'db> SemanticsImpl<'db> {
                     match node {
                         ast::MacroCall(macro_call) => {
                             let tt = macro_call.token_tree()?;
-                            if !tt.syntax().text_range().contains_range(token.value.text_range()) {
+                            let l_delim = match tt.left_delimiter_token() {
+                                Some(it) => it.text_range().end(),
+                                None => tt.syntax().text_range().start()
+                            };
+                            let r_delim = match tt.right_delimiter_token() {
+                                Some(it) => it.text_range().start(),
+                                None => tt.syntax().text_range().end()
+                            };
+                            if !TextRange::new(l_delim, r_delim).contains_range(token.value.text_range()) {
                                 return None;
                             }
                             let file_id = sa.expand(self.db, token.with_value(&macro_call))?;

crates/ide/src/syntax_highlighting/test_data/highlighting.html

@@ -148,6 +148,10 @@
     <span class="brace">}</span>
 <span class="brace">}</span>
 
+<span class="keyword">macro_rules</span><span class="punctuation">!</span> <span class="macro declaration">dont_color_me_braces</span> <span class="brace">{</span>
+    <span class="parenthesis">(</span><span class="parenthesis">)</span> <span class="operator">=</span><span class="angle">&gt;</span> <span class="brace">{</span><span class="numeric_literal">0</span><span class="brace">}</span>
+<span class="brace">}</span>
+
 <span class="keyword">macro_rules</span><span class="punctuation">!</span> <span class="macro declaration">noop</span> <span class="brace">{</span>
     <span class="parenthesis">(</span><span class="punctuation">$</span>expr<span class="colon">:</span>expr<span class="parenthesis">)</span> <span class="operator">=</span><span class="angle">&gt;</span> <span class="brace">{</span>
         <span class="punctuation">$</span>expr
@@ -171,6 +175,7 @@
 <span class="comment">// comment</span>
 <span class="keyword">fn</span> <span class="function declaration">main</span><span class="parenthesis">(</span><span class="parenthesis">)</span> <span class="brace">{</span>
     <span class="macro">println!</span><span class="parenthesis">(</span><span class="string_literal">"Hello, {}!"</span><span class="comma">,</span> <span class="numeric_literal">92</span><span class="parenthesis">)</span><span class="semicolon">;</span>
+    <span class="macro">dont_color_me_braces!</span><span class="parenthesis">(</span><span class="parenthesis">)</span><span class="semicolon">;</span>
 
     <span class="keyword">let</span> <span class="keyword">mut</span> <span class="variable declaration mutable">vec</span> <span class="operator">=</span> <span class="unresolved_reference">Vec</span><span class="operator">::</span><span class="unresolved_reference">new</span><span class="parenthesis">(</span><span class="parenthesis">)</span><span class="semicolon">;</span>
     <span class="keyword control">if</span> <span class="bool_literal">true</span> <span class="brace">{</span>

crates/ide/src/syntax_highlighting/tests.rs

@@ -122,6 +122,10 @@ def_fn! {
     }
 }
 
+macro_rules! dont_color_me_braces {
+    () => {0}
+}
+
 macro_rules! noop {
     ($expr:expr) => {
         $expr
@@ -145,6 +149,7 @@ macro without_args {
 // comment
 fn main() {
     println!("Hello, {}!", 92);
+    dont_color_me_braces!();
 
     let mut vec = Vec::new();
     if true {