Implement C++ pretty-printer

luprex/core/cpp/print.hpp

@@ -20,6 +20,15 @@ void luai_writestring(const char *s, size_t len);
 void luai_writeline();
 }
 
+// Output a simple value to a stream.
+//
+// If the value is a string, number, boolean, or nil, it is
+// quoted and output to the stream, and this function returns
+// true.  Otherwise, this function returns false and nothing
+// is sent to the stream.
+//
+bool string_quote(LuaStack &LS, LuaSlot val, std::ostream *os);
+
 // Pretty print to a stream.
 //
 // If indent is >=0, the output is indented.  If indent<0, then
@@ -32,15 +41,15 @@ void pprint(LuaStack &LS, LuaSlot val, int indent, int maxlen, std::ostream *os)
 
 // The following lua interfaces to this code are included:
 //
-// pprint(expr)
+// pprint(expr, expr, expr...)
 //
 // - pretty print the specified expression to stdout.
 //
-// string.pprint(expr, indent, maxlen)
+// string.pprint(expr, indent)
 //
 // - pretty print the specified expression, return the result as a string.
 //
-void pprint_pprint(lua_State *L);
-void string_pprint(lua_State *L);
+int lfn_pprint_pprint(lua_State *L);
+int lfn_string_pprint(lua_State *L);
 
 #endif // PRINT_HPP