Fix util::ostringstream, fix pretty-printing, stub out new globals

luprex/cpp/core/pprint.hpp

@@ -22,6 +22,14 @@
 #include "luastack.hpp"
 #include <ostream>
 
+struct PrettyPrintOptions {
+    bool indent;
+    int level;
+    bool expand;
+    PrettyPrintOptions() : indent(true), level(0), expand(true) {}
+    void parse(LuaKeywordParser &kp);
+};
+
 // Atomic print to a stream.
 //
 // This prints an atomic value to a stream.  If you give it a table,
@@ -32,6 +40,6 @@ void atomic_print(LuaStack &LS, LuaSlot val, bool quote, std::ostream *os);
 
 // Pretty print to a stream.
 //
-void pprint(LuaStack &LS, LuaSlot val, bool indent, std::ostream *os);
+void pprint(LuaStack &LS, LuaSlot val, const PrettyPrintOptions &opts, std::ostream *os);
 
 #endif // PPRINT_HPP