syntax_data: {"ast_node_type":"other","tokens":[{"end":98,"kind":"keyword","start":0,"text":"//"}]}
source_snippet: // ensure that vectors can only be passed via `extern "C"` when the right feature is enabled. (For
context_before: // information about which target feature is ABI-required for which vector size; this is used to
context_after: // the "Rust" ABI we generally pass vectors by-ref exactly to avoid these issues.)