Fix parsing BibTeX accents with command inside

Fixes #945.

CHANGELOG.md

@@ -15,6 +15,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Fixed
 
 - Moving the build logs to the recycle bin will now clear the diagnostics ([texlab-vscode/#825](https://github.com/latex-lsp/texlab-vscode/issues/825))
+- Fix false positive when reporting syntax errors for BibTeX accents ([#945](https://github.com/latex-lsp/texlab/issues/945))
 
 ## [5.10.1] - 2023-10-10
 

crates/parser/src/bibtex.rs

@@ -181,7 +181,9 @@ fn accent(mut ptr: TokenPtr<ContentToken>) -> TokenPtr<ContentToken> {
         ptr.expect(ContentToken::Whitespace);
     }
 
-    ptr.expect(ContentToken::Word);
+    if ptr.at(ContentToken::Word) || ptr.at(ContentToken::CommandName) {
+        ptr.bump();
+    }
 
     if group {
         ptr.expect(ContentToken::Whitespace);

crates/parser/src/snapshots/parser__bibtex__tests__parse@issue_945.txt.snap

@@ -0,0 +1,27 @@
+---
+source: crates/parser/src/bibtex.rs
+expression: root
+input_file: crates/parser/src/test_data/bibtex/issue_945.txt
+---
+ROOT@0..33
+  ENTRY@0..33
+    TYPE@0..8 "@article"
+    L_DELIM@8..9 "{"
+    NAME@9..13 "test"
+    COMMA@13..14 ","
+    WHITESPACE@14..15 " "
+    FIELD@15..32
+      NAME@15..21 "author"
+      WHITESPACE@21..22 " "
+      EQ@22..23 "="
+      WHITESPACE@23..24 " "
+      CURLY_GROUP@24..32
+        L_CURLY@24..25 "{"
+        ACCENT@25..31
+          ACCENT_NAME@25..27 "\\\""
+          L_CURLY@27..28 "{"
+          COMMAND_NAME@28..30 "\\i"
+          R_CURLY@30..31 "}"
+        R_CURLY@31..32 "}"
+    R_DELIM@32..33 "}"
+

crates/parser/src/test_data/bibtex/issue_945.txt

@@ -0,0 +1 @@
+@article{test, author = {\"{\i}}}