guard.rs

fn unwrappin_life() {
    guard! {
        let decl = match blk.stmts[0].node { StmtDecl(ref decl, _) };
        let item = match decl.node { DeclItem(ref item) };
        let expr = match item.node { ItemStatic(_, _, ref expr) };
        let ptr = match expr.node { ExprAddrOf(_, ref ptr) };
        let array = match ptr.node { ExprVec(ref array) };
        else return nope!("lack of array of strings")
    }
}