Gets vertical skylines from grob stencils

lily/lily-parser.cc

 /*
   This file is part of LilyPond, the GNU music typesetter.
 
   Copyright (C) 1997--2012 Han-Wen Nienhuys <hanwen@xs4all.nl>
   Jan Nieuwenhuizen <janneke@gnu.org>
 
   LilyPond is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation, either version 3 of the License, or
   (at your option) any later version.
@@ skipping 102 matching lines @@
 
   File_name f (name);
   string s = global_path.find (f.base_ + ".twy");
   s = gulp_file_to_string (s, false, -1);
   scm_eval_string (ly_string2scm (s));
 
   /* Read .ly IN_FILE, lex, parse, write \score blocks from IN_FILE to
      OUT_FILE (unless IN_FILE redefines output file name).  */
 
   SCM mod = lexer_->set_current_scope ();
-  do {
-    do_yyparse ();
-  } while (!lexer_->is_clean ());
+  do
+    {
+      do_yyparse ();
+    }
+  while (!lexer_->is_clean ());
 
   /*
     Don't mix cyclic pointers with weak tables.
   */
   lexer_->set_identifier (ly_symbol2scm ("parser"),
                           SCM_EOL);
   ly_reexport_module (scm_current_module ());
 
   scm_set_current_module (mod);
 
@@ skipping 174 matching lines @@
 
   return id;
 }
 
 SCM
 Lily_parser::make_scope () const
 {
   SCM module = ly_make_module (be_safe_global);
   return module;
 }