syntax_data: {"ast_node_type":"other","tokens":[{"end":45,"kind":"keyword","start":0,"text":"base.rustc_abi"}]}
source_snippet:     base.rustc_abi = Some(RustcAbi::X86Sse2);
context_before:     base.vendor = "win7".into();
context_after:     base.cpu = "pentium4".into();