fn init_body_helper(
ecx: &ExtCtxt<'_>,
span: Span,
primal: Ident,
new_names: &[String],
sig_span: Span,
new_decl_span: Span,
idents: &[Ident],
errored: bool,
generics: &Generics,
) -> (P<Block>, P<Expr>, P<Expr>, P<Expr>)