syntax_data: {"ast_node_type":"other","tokens":[{"end":98,"kind":"keyword","start":0,"text":"PatKind::Constant"}]}
source_snippet:                 PatKind::Constant { value: mir::Const::Ty(ty, ty::Const::new_value(tcx, cv, ty)) }
context_before:                 // just integers, so we simply allow them.
context_after:             }