// Query: extends_chain
// Returns: (symbol_name, file_path) tuples for types that extend another type
// Tests: EXTENDS edge resolution
// Note: Rust repos have no EXTENDS edges; expect empty set on both sides.
// C++ structs use inheritance extensively, so Struct must be matched as well
// as Class (the original query only matched Class, missing ~52/71 fmt structs).
// === CODENEXUS ===
MATCH (r:CodeRelation)
WHERE r.type = 'EXTENDS' AND r.project = '__PID__'
WITH r
MATCH (child:Class)
WHERE child.id = r.source
RETURN child.name AS symbol_name, child.filePath AS file_path
UNION
MATCH (r:CodeRelation)
WHERE r.type = 'EXTENDS' AND r.project = '__PID__'
WITH r
MATCH (child:Struct)
WHERE child.id = r.source
RETURN child.name AS symbol_name, child.filePath AS file_path
ORDER BY symbol_name, file_path
LIMIT 200
// === GITNEXUS ===
MATCH (child)-[r:CodeRelation]->(parent)
WHERE r.type = 'EXTENDS'
RETURN child.name AS symbol_name, child.filePath AS file_path
ORDER BY symbol_name, file_path
LIMIT 200