-use ast;
-use syntax_pos::{self, Pos, Span, FileName};
-use ext::base::*;
-use ext::base;
-use ext::build::AstBuilder;
-use parse::{token, DirectoryOwnership};
-use parse;
-use print::pprust;
-use ptr::P;
+use crate::ast;
+use crate::ext::base::{self, *};
+use crate::ext::build::AstBuilder;
+use crate::parse::{self, token, DirectoryOwnership};
+use crate::print::pprust;
+use crate::ptr::P;
+use crate::symbol::Symbol;
+use crate::tokenstream;
+