syntax_data: {"ast_node_type":"other","tokens":[{"end":33,"kind":"keyword","start":0,"text":"*avail_fprs"}]}
source_snippet:                 *avail_fprs -= 2;
context_before:             Some(FloatConv::FloatPair(l, r)) if *avail_fprs >= 2 => {
context_after:                 arg.cast_to(CastTarget::pair(l, r));