syntax_data: {"ast_node_type":"other","tokens":[{"end":87,"kind":"keyword","start":0,"text":"matches!(arg.mode,"}]}
source_snippet:                         matches!(arg.mode, PassMode::Indirect { on_stack: false, .. });
context_before:                     let is_indirect_not_on_stack =
context_after:                     assert!(is_indirect_not_on_stack);