use crate::base::ExtCtxt;
+use rustc_span::source_map::{respan, Spanned};
+use rustc_span::symbol::{kw, sym, Symbol};
use syntax::ast::{self, AttrVec, BlockCheckMode, Expr, Ident, PatKind, UnOp};
use syntax::attr;
use syntax::ptr::P;
-use syntax::source_map::{respan, Spanned};
-use syntax::symbol::{kw, sym, Symbol};
use rustc_span::Span;