syntax_data: {"ast_node_type":"other","tokens":[{"end":82,"kind":"keyword","start":0,"text":"if"}]}
source_snippet:                 if this.check_overflow && op == UnOp::Neg && expr.ty.is_signed() {
context_before:                 // Check for -MIN on signed integers
context_after:                     let bool_ty = this.tcx.types.bool;