Fix line continuation handling and improve error handling

Co-authored-by: gerlero <[email protected]>

Author: Copilot

rust_src/lib.rs

@@ -87,7 +87,8 @@ fn skip(contents: &Bound<'_, pyo3::types::PyAny>, mut pos: usize, newline_ok: bo
 
                     // Handle line continuation
                     if contents[pos] == b'\\' && pos + 1 < contents.len() && contents[pos + 1] == b'\n' {
-                        pos += 1;
+                        pos += 2;
+                        continue;
                     }
 
                     pos += 1;

src/foamlib/_files/_parsing/_parser.py

@@ -97,11 +97,15 @@ def _skip(
             return _skip_rust(contents, pos, newline_ok=newline_ok)
         except ValueError as e:
             # Convert ValueError from Rust to FoamFileDecodeError
-            raise FoamFileDecodeError(
-                contents,
-                len(contents),
-                expected="*/",
-            ) from e
+            # The Rust implementation raises ValueError for unterminated comments
+            if "Unterminated comment" in str(e):
+                raise FoamFileDecodeError(
+                    contents,
+                    len(contents),
+                    expected="*/",
+                ) from e
+            # Re-raise other ValueErrors (e.g., type errors)
+            raise
 
     # Fallback to Python implementation
     is_whitespace = _IS_WHITESPACE if newline_ok else _IS_WHITESPACE_NO_NEWLINE