comp/fuzzer: rewrite to use io::with_str_reader.

Author: erickt

src/fuzzer/fuzzer.rs

@@ -412,12 +412,14 @@ fn parse_and_print(code: @str) -> str {
     write_file(filename, *code);
     let crate = parser::parse_crate_from_source_str(
         filename, code, [], sess);
-    ret as_str(bind pprust::print_crate(sess.cm,
+    io::with_str_reader(*code) { |rdr|
+        as_str(bind pprust::print_crate(sess.cm,
                                         sess.span_diagnostic,
                                         crate,
                                         filename,
-                                        io::str_reader(*code), _,
-                                        pprust::no_ann()));
+                                        rdr, _,
+                                        pprust::no_ann()))
+    }
 }
 
 fn has_raw_pointers(c: ast::crate) -> bool {
@@ -557,13 +559,15 @@ fn check_variants(files: [str], cx: context) {
             parser::parse_crate_from_source_str(
                 file,
                 s, [], sess);
-        #error("%s",
-               as_str(bind pprust::print_crate(sess.cm,
-                                               sess.span_diagnostic,
-                                               crate,
-                                               file,
-                                               io::str_reader(*s), _,
-                                               pprust::no_ann())));
+        io::with_str_reader(*s) { |rdr|
+            #error("%s",
+                   as_str(bind pprust::print_crate(sess.cm,
+                                                   sess.span_diagnostic,
+                                                   crate,
+                                                   file,
+                                                   rdr, _,
+                                                   pprust::no_ann())));
+        }
         check_variants_of_ast(*crate, sess.cm, file, cx);
     }
 }

src/rustc/driver/driver.rs

@@ -272,8 +272,10 @@ fn pretty_print_input(sess: session, cfg: ast::crate_cfg, input: str,
       ppm_expanded | ppm_normal {}
     }
     let src = codemap::get_filemap(sess.codemap, input).src;
-    pprust::print_crate(sess.codemap, sess.span_diagnostic, crate, input,
-                        io::str_reader(*src), io::stdout(), ann);
+    io::with_str_reader(*src) { |rdr|
+        pprust::print_crate(sess.codemap, sess.span_diagnostic, crate, input,
+                            rdr, io::stdout(), ann);
+    }
 }
 
 fn get_os(triple: str) -> option<session::os> {