syntax_data: {"ast_node_type":"variable","tokens":[{"end":58,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:     let out_filename = outputs.path(OutputType::Metadata);
context_before: pub fn filename_for_metadata(sess: &Session, outputs: &OutputFilenames) -> OutFileName {
context_after:     if let OutFileName::Real(ref path) = out_filename {