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-rw-r--r--libbutl/standard-version.cxx34
1 files changed, 30 insertions, 4 deletions
diff --git a/libbutl/standard-version.cxx b/libbutl/standard-version.cxx
index 13d3987..d8582dd 100644
--- a/libbutl/standard-version.cxx
+++ b/libbutl/standard-version.cxx
@@ -2,15 +2,41 @@
// copyright : Copyright (c) 2014-2017 Code Synthesis Ltd
// license : MIT; see accompanying LICENSE file
-#include <libbutl/standard-version.hxx>
+#ifndef __cpp_modules
+#include <libbutl/standard-version.mxx>
+#endif
#include <cassert>
+
+#ifndef __cpp_lib_modules
+#include <string>
+#include <cstdint>
+#include <cstddef>
+#include <ostream>
+
#include <cstdlib> // strtoull()
-#include <cstddef> // size_t
#include <utility> // move()
#include <stdexcept> // invalid_argument
-
-#include <libbutl/utility.hxx> // alnum()
+#endif
+
+// Other includes.
+
+#ifdef __cpp_modules
+module butl.standard_version;
+
+// Only imports additional to interface.
+#ifdef __clang__
+#ifdef __cpp_lib_modules
+import std.core;
+import std.io;
+#endif
+import butl.optional;
+#endif
+
+import butl.utility;
+#else
+#include <libbutl/utility.mxx> // alnum()
+#endif
using namespace std;