syntax_data: {"ast_node_type":"other","tokens":[{"end":99,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:             // unlikely. Also: all users of `simd_shuffle` are on unstable and already need to take
context_before:             // a constant and write that value back into `Operand`s. This could happen, but is
context_after:             // a lot of care around intrinsics. For an issue to happen here, it would require a