Handle span error with continue

This should be properly addressed by #184, but requires a change to the rustc parser, so this patch just works around the issue.

src/expr.rs

@@ -105,6 +105,16 @@ impl Rewrite for ast::Expr {
             ast::Expr_::ExprPath(ref qself, ref path) => {
                 rewrite_path(context, qself.as_ref(), path, width, offset)
             }
+            // FIXME #184 Note that this formatting is broken due to a bad span
+            // from the parser.
+            // `continue`
+            ast::Expr_::ExprAgain(ref opt_ident) => {
+                let id_str = match *opt_ident {
+                    Some(ident) => format!(" {}", ident),
+                    None => String::new(),
+                };
+                Some(format!("continue{}", id_str))
+            }
             _ => context.codemap.span_to_snippet(self.span).ok(),
         }
     }

src/lib.rs

@@ -11,7 +11,8 @@
 #![feature(rustc_private)]
 #![feature(str_escape)]
 #![feature(str_char)]
-
+#![feature(custom_attribute)]
+#![allow(unused_attributes)]
 
 // TODO we're going to allocate a whole bunch of temp Strings, is it worth
 // keeping some scratch mem for this and running our own StrPool?
@@ -227,6 +228,8 @@ fn fmt_ast(krate: &ast::Crate, codemap: &CodeMap, config: &Config) -> FileMap {
 // Formatting done on a char by char or line by line basis.
 // TODO warn on bad license
 // TODO other stuff for parity with make tidy
+// FIXME skipping due to `continue`, #184.
+#[rustfmt_skip]
 fn fmt_lines(file_map: &mut FileMap, config: &Config) -> FormatReport {
     let mut truncate_todo = Vec::new();
     let mut report = FormatReport { file_error_map: HashMap::new() };

tests/source/loop.rs

@@ -21,5 +21,8 @@ let x = loop { do_forever(); };
     while let  Some(i) =     x.find('s')
     {
         x.update();
+        // FIXME #184
+        // continue;
+        // continue 'foo;
     }
 }

tests/target/loop.rs

@@ -25,5 +25,8 @@ fn main() {
 
     while let Some(i) = x.find('s') {
         x.update();
+        // FIXME #184
+        // continue;
+        // continue 'foo;
     }
 }