syntax_data: {"ast_node_type":"other","tokens":[{"end":76,"kind":"keyword","start":0,"text":"//"}]}
source_snippet: // See https://github.com/rust-lang/rust/pull/119440#issuecomment-1874255727
context_before: // This code is very hot and uses lots of arithmetic, avoid overflow checks for performance.
context_after: use rustc_serialize::int_overflow::DebugStrictAdd;