syntax_data: {"ast_node_type":"other","tokens":[{"end":60,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:         // the settings for the crate they are codegened in.
context_before:         // however, they may not get codegen'd, depending on
context_after:         let mut check_overflow = attr::contains_name(attrs, sym::rustc_inherit_overflow_checks);