syntax_data: {"ast_node_type":"other","tokens":[{"end":83,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:     // We forbid directly toggling just `fp-armv8`; it must be toggled with `neon`.
context_before:     ("flagm2", Unstable(sym::aarch64_unstable_target_feature), &[]),
context_after:     ("fp-armv8", Stability::Forbidden { reason: "Rust ties `fp-armv8` to `neon`" }, &[]),