Refactor away ext::expand::{expand_crate, expand_crate_with_expander}.

src/librustc_driver/driver.rs

@@ -686,11 +686,17 @@ pub fn phase_2_configure_and_expand<'a, F>(sess: &Session,
             ..syntax::ext::expand::ExpansionConfig::default(crate_name.to_string())
         };
         let mut ecx = ExtCtxt::new(&sess.parse_sess, krate.config.clone(), cfg, &mut resolver);
-        let ret = syntax::ext::expand::expand_crate(&mut ecx, krate);
+        let err_count = ecx.parse_sess.span_diagnostic.err_count();
+
+        let krate = ecx.monotonic_expander().expand_crate(krate);
+
+        if ecx.parse_sess.span_diagnostic.err_count() - ecx.resolve_err_count > err_count {
+            ecx.parse_sess.span_diagnostic.abort_if_errors();
+        }
         if cfg!(windows) {
             env::set_var("PATH", &old_path);
         }
-        ret
+        krate
     });
 
     krate.exported_macros = mem::replace(&mut resolver.exported_macros, Vec::new());

src/libsyntax/ext/base.rs

@@ -22,7 +22,6 @@ use parse::{self, parser};
 use parse::token;
 use parse::token::{InternedString, str_to_ident};
 use ptr::P;
-use std_inject;
 use util::small_vector::SmallVector;
 
 use std::path::PathBuf;
@@ -737,17 +736,6 @@ impl<'a> ExtCtxt<'a> {
     pub fn name_of(&self, st: &str) -> ast::Name {
         token::intern(st)
     }
-
-    pub fn initialize(&mut self, krate: &ast::Crate) {
-        self.crate_root = std_inject::injected_crate_name(krate);
-
-        let mut module = ModuleData {
-            mod_path: vec![token::str_to_ident(&self.ecfg.crate_name)],
-            directory: PathBuf::from(self.parse_sess.codemap().span_to_filename(krate.span)),
-        };
-        module.directory.pop();
-        self.current_expansion.module = Rc::new(module);
-    }
 }
 
 /// Extract a string literal from the macro expanded version of `expr`,

src/libsyntax/ext/expand.rs

@@ -8,7 +8,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use ast::{Block, Crate, Ident, Mac_, PatKind};
+use ast::{Block, Ident, Mac_, PatKind};
 use ast::{Name, MacStmtStyle, StmtKind, ItemKind};
 use ast;
 use ext::hygiene::Mark;
@@ -26,6 +26,7 @@ use parse::parser::Parser;
 use parse::token::{self, intern, keywords};
 use print::pprust;
 use ptr::P;
+use std_inject;
 use tokenstream::{TokenTree, TokenStream};
 use util::small_vector::SmallVector;
 use visit::Visitor;
@@ -186,8 +187,14 @@ impl<'a, 'b> MacroExpander<'a, 'b> {
         MacroExpander { cx: cx, monotonic: monotonic }
     }
 
-    fn expand_crate(&mut self, mut krate: ast::Crate) -> ast::Crate {
-        let err_count = self.cx.parse_sess.span_diagnostic.err_count();
+    pub fn expand_crate(&mut self, mut krate: ast::Crate) -> ast::Crate {
+        self.cx.crate_root = std_inject::injected_crate_name(&krate);
+        let mut module = ModuleData {
+            mod_path: vec![token::str_to_ident(&self.cx.ecfg.crate_name)],
+            directory: PathBuf::from(self.cx.codemap().span_to_filename(krate.span)),
+        };
+        module.directory.pop();
+        self.cx.current_expansion.module = Rc::new(module);
 
         let krate_item = Expansion::Items(SmallVector::one(P(ast::Item {
             attrs: krate.attrs,
@@ -206,10 +213,6 @@ impl<'a, 'b> MacroExpander<'a, 'b> {
             _ => unreachable!(),
         };
 
-        if self.cx.parse_sess.span_diagnostic.err_count() - self.cx.resolve_err_count > err_count {
-            self.cx.parse_sess.span_diagnostic.abort_if_errors();
-        }
-
         krate
     }
 
@@ -866,18 +869,6 @@ impl<'feat> ExpansionConfig<'feat> {
     }
 }
 
-pub fn expand_crate(cx: &mut ExtCtxt, c: Crate) -> Crate {
-    cx.initialize(&c);
-    cx.monotonic_expander().expand_crate(c)
-}
-
-// Expands crate using supplied MacroExpander - allows for
-// non-standard expansion behaviour (e.g. step-wise).
-pub fn expand_crate_with_expander(expander: &mut MacroExpander, c: Crate) -> Crate {
-    expander.cx.initialize(&c);
-    expander.expand_crate(c)
-}
-
 // A Marker adds the given mark to the syntax context and
 // sets spans' `expn_id` to the given expn_id (unless it is `None`).
 struct Marker { mark: Mark, expn_id: Option<ExpnId> }