fix: add '#include <tuple>'

src/frontends/lean/parser.cpp

@@ -14,6 +14,7 @@ Author: Leonardo de Moura
 #include <unordered_map>
 #include <utility>
 #include <string>
+#include <tuple>
 #include <vector>
 #include "util/scoped_map.h"
 #include "util/exception.h"

src/frontends/lean/pp.cpp

@@ -6,6 +6,7 @@ Author: Leonardo de Moura
 */
 #include <limits>
 #include <memory>
+#include <tuple>
 #include <utility>
 #include <vector>
 #include "util/scoped_map.h"

src/kernel/environment.cpp

@@ -7,6 +7,7 @@ Author: Leonardo de Moura
 #include <algorithm>
 #include <vector>
 #include <atomic>
+#include <tuple>
 #include <unordered_map>
 #include "util/safe_arith.h"
 #include "kernel/for_each.h"

src/kernel/expr.h

@@ -10,6 +10,7 @@ Author: Leonardo de Moura
 #include <iostream>
 #include <limits>
 #include <utility>
+#include <tuple>
 #include "util/rc.h"
 #include "util/name.h"
 #include "util/hash.h"

src/kernel/replace.h

@@ -5,6 +5,7 @@ Released under Apache 2.0 license as described in the file LICENSE.
 Author: Leonardo de Moura
 */
 #pragma once
+#include <tuple>
 #include "util/buffer.h"
 #include "kernel/expr.h"
 #include "kernel/expr_maps.h"

src/kernel/replace_visitor.cpp

@@ -4,6 +4,7 @@ Released under Apache 2.0 license as described in the file LICENSE.
 
 Author: Leonardo de Moura
 */
+#include <tuple>
 #include "kernel/replace_visitor.h"
 
 namespace lean {

src/library/max_sharing.cpp

@@ -4,6 +4,7 @@ Released under Apache 2.0 license as described in the file LICENSE.
 
 Author: Leonardo de Moura
 */
+#include <tuple>
 #include <unordered_set>
 #include "util/buffer.h"
 #include "library/max_sharing.h"