Mark empty constructors and destructors as defaulted

[libs/datafile.git] / source / parsermode.h

diff --git a/source/parsermode.h b/source/parsermode.h
index 491647e4b09a0b9c307d4f4aa32a6078403ed9a5..319b0f1ae0bf5162bd08e0101f894bf48ab53375 100644 (file)
--- a/source/parsermode.h
+++ b/source/parsermode.h
@@ -1,6 +1,7 @@
 #ifndef MSP_DATAFILE_PARSERMODE_H_
 #define MSP_DATAFILE_PARSERMODE_H_
 
+#include <msp/core/noncopyable.h>
 #include "statement.h"
 
 namespace Msp {
@@ -13,7 +14,7 @@ class LoaderAction;
 /**
 Base class for parse modes.
 */
-class ParserMode
+class ParserMode: private NonCopyable
 {
 protected:
        Input &in;
@@ -21,12 +22,12 @@ protected:
 
        ParserMode(Input &i, const std::string &s): in(i), src(s) { }
 public:
-       virtual ~ParserMode() { }
+       virtual ~ParserMode() = default;
 
        virtual Statement parse() = 0;
        virtual void process_control_statement(const Statement &) { }
 
-       virtual const StatementKey *peek(unsigned) { return 0; }
+       virtual const StatementKey *peek(unsigned) { return nullptr; }
        virtual bool parse_and_load(unsigned, Loader &, const LoaderAction &) { return false; }
 };