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-rw-r--r--kernel/yosys.h7
1 files changed, 7 insertions, 0 deletions
diff --git a/kernel/yosys.h b/kernel/yosys.h
index 80346a47c..89a4f6084 100644
--- a/kernel/yosys.h
+++ b/kernel/yosys.h
@@ -41,6 +41,7 @@
#include <map>
#include <set>
+#include <tuple>
#include <vector>
#include <string>
#include <algorithm>
@@ -138,8 +139,14 @@ YOSYS_NAMESPACE_BEGIN
using std::vector;
using std::string;
+using std::tuple;
using std::pair;
+using std::make_tuple;
+using std::make_pair;
+using std::min;
+using std::max;
+
// A primitive shared string implementation that does not
// move its .c_str() when the object is copied or moved.
struct shared_str {