syntax_data: {"ast_node_type":"variable","tokens":[{"end":69,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:                 let actual_int = valtree.unwrap_leaf().to_bits(size);
context_before:                 let size = pat.ty().primitive_size(self.tcx);
context_after:                 let actual_int = if pat.ty().is_signed() {