syntax_data: {"ast_node_type":"variable","tokens":[{"end":90,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:         let reg = if arg.layout.align.abi.bytes() > 8 { Reg::i128() } else { Reg::i64() };
context_before:         // this, even if there is only a single element.
context_after:         arg.cast_to(Uniform::consecutive(