Move “using namespace std” statement after inclusion of standard headers

Otherwise clang emits this warning:
 using directive refers to implicitly-defined namespace 'std'

src/DataTree.hh

@@ -1,5 +1,5 @@
 /*
- * Copyright © 2003-2021 Dynare Team
+ * Copyright © 2003-2022 Dynare Team
  *
  * This file is part of Dynare.
  *
@@ -20,8 +20,6 @@
 #ifndef _DATATREE_HH
 #define _DATATREE_HH
 
-using namespace std;
-
 #include <string>
 #include <map>
 #include <vector>
@@ -36,6 +34,8 @@ using namespace std;
 #include "ExprNode.hh"
 #include "SubModel.hh"
 
+using namespace std;
+
 class DataTree
 {
 public:

src/DynamicModel.hh

@@ -1,5 +1,5 @@
 /*
- * Copyright © 2003-2021 Dynare Team
+ * Copyright © 2003-2022 Dynare Team
  *
  * This file is part of Dynare.
  *
@@ -20,13 +20,13 @@
 #ifndef _DYNAMICMODEL_HH
 #define _DYNAMICMODEL_HH
 
-using namespace std;
-
 #include <fstream>
 #include <filesystem>
 
 #include "StaticModel.hh"
 
+using namespace std;
+
 //! Stores a dynamic model
 class DynamicModel : public ModelTree
 {

src/DynareFlex.ll

@@ -1,6 +1,6 @@
 /* -*- C++ -*- */
 /*
- * Copyright © 2003-2021 Dynare Team
+ * Copyright © 2003-2022 Dynare Team
  *
  * This file is part of Dynare.
  *
@@ -20,11 +20,11 @@
 
 
 %{
-using namespace std;
-
 #include <cstring>
 #include "ParsingDriver.hh"
 
+using namespace std;
+
 // Announce to Flex the prototype we want for lexing function
 #define YY_DECL                                                \
   Dynare::parser::token_type                                   \

src/EquationTags.hh

@@ -1,5 +1,5 @@
 /*
- * Copyright © 2020-2021 Dynare Team
+ * Copyright © 2020-2022 Dynare Team
  *
  * This file is part of Dynare.
  *
@@ -20,12 +20,12 @@
 #ifndef _EQUATION_TAGS_HH
 #define _EQUATION_TAGS_HH
 
-using namespace std;
-
 #include <map>
 #include <set>
 #include <string>
 
+using namespace std;
+
 class EquationTags
 {
 private:

src/ExternalFunctionsTable.hh

@@ -1,5 +1,5 @@
 /*
- * Copyright © 2010-2019 Dynare Team
+ * Copyright © 2010-2022 Dynare Team
  *
  * This file is part of Dynare.
  *
@@ -20,13 +20,13 @@
 #ifndef _EXTERNALFUNCTIONSTABLE_HH
 #define _EXTERNALFUNCTIONSTABLE_HH
 
-using namespace std;
-
 #include <iostream>
 #include <string>
 #include <vector>
 #include <map>
 
+using namespace std;
+
 //! Handles external functions
 class ExternalFunctionsTable
 {

src/ModFile.hh

@@ -1,5 +1,5 @@
 /*
- * Copyright © 2006-2021 Dynare Team
+ * Copyright © 2006-2022 Dynare Team
  *
  * This file is part of Dynare.
  *
@@ -20,8 +20,6 @@
 #ifndef _MOD_FILE_HH
 #define _MOD_FILE_HH
 
-using namespace std;
-
 #include <ostream>
 #include <ctime>
 #include <iostream>
@@ -40,6 +38,8 @@ using namespace std;
 #include "ExtendedPreprocessorTypes.hh"
 #include "SubModel.hh"
 
+using namespace std;
+
 //! The abstract representation of a "mod" file
 class ModFile
 {

src/ModelTree.hh

@@ -1,5 +1,5 @@
 /*
- * Copyright © 2003-2021 Dynare Team
+ * Copyright © 2003-2022 Dynare Team
  *
  * This file is part of Dynare.
  *
@@ -20,8 +20,6 @@
 #ifndef _MODELTREE_HH
 #define _MODELTREE_HH
 
-using namespace std;
-
 #include <string>
 #include <vector>
 #include <deque>
@@ -34,6 +32,8 @@ using namespace std;
 #include "EquationTags.hh"
 #include "ExtendedPreprocessorTypes.hh"
 
+using namespace std;
+
 // Helper to convert a vector into a tuple
 template<typename T, size_t... Indices>
 auto

src/NumericalConstants.hh

@@ -1,5 +1,5 @@
 /*
- * Copyright © 2003-2016 Dynare Team
+ * Copyright © 2003-2022 Dynare Team
  *
  * This file is part of Dynare.
  *
@@ -20,12 +20,12 @@
 #ifndef _NUMERICALCONSTANTS_HH
 #define _NUMERICALCONSTANTS_HH
 
-using namespace std;
-
 #include <string>
 #include <vector>
 #include <map>
 
+using namespace std;
+
 //! Handles non-negative numerical constants
 class NumericalConstants
 {

src/NumericalInitialization.hh

@@ -1,5 +1,5 @@
 /*
- * Copyright © 2003-2021 Dynare Team
+ * Copyright © 2003-2022 Dynare Team
  *
  * This file is part of Dynare.
  *
@@ -20,8 +20,6 @@
 #ifndef _NUMERICALINITIALIZATION_HH
 #define _NUMERICALINITIALIZATION_HH
 
-using namespace std;
-
 #include <string>
 #include <vector>
 #include <map>
@@ -30,6 +28,8 @@ using namespace std;
 #include "ExprNode.hh"
 #include "Statement.hh"
 
+using namespace std;
+
 class InitParamStatement : public Statement
 {
 private:

src/Shocks.hh

@@ -1,5 +1,5 @@
 /*
- * Copyright © 2003-2021 Dynare Team
+ * Copyright © 2003-2022 Dynare Team
  *
  * This file is part of Dynare.
  *
@@ -20,8 +20,6 @@
 #ifndef _SHOCKS_HH
 #define _SHOCKS_HH
 
-using namespace std;
-
 #include <string>
 #include <vector>
 #include <map>
@@ -30,6 +28,8 @@ using namespace std;
 #include "SymbolTable.hh"
 #include "ExprNode.hh"
 
+using namespace std;
+
 class AbstractShocksStatement : public Statement
 {
 public:

src/StaticModel.hh

@@ -1,5 +1,5 @@
 /*
- * Copyright © 2003-2020 Dynare Team
+ * Copyright © 2003-2022 Dynare Team
  *
  * This file is part of Dynare.
  *
@@ -20,13 +20,13 @@
 #ifndef _STATIC_MODEL_HH
 #define _STATIC_MODEL_HH
 
-using namespace std;
-
 #include <fstream>
 #include <filesystem>
 
 #include "ModelTree.hh"
 
+using namespace std;
+
 class DynamicModel;
 
 //! Stores a static model, as derived from the "model" block when leads and lags have been removed

src/SymbolTable.hh

@@ -1,5 +1,5 @@
 /*
- * Copyright © 2003-2021 Dynare Team
+ * Copyright © 2003-2022 Dynare Team
  *
  * This file is part of Dynare.
  *
@@ -20,8 +20,6 @@
 #ifndef _SYMBOLTABLE_HH
 #define _SYMBOLTABLE_HH
 
-using namespace std;
-
 #include <map>
 #include <string>
 #include <utility>
@@ -32,6 +30,8 @@ using namespace std;
 #include "CodeInterpreter.hh"
 #include "ExprNode.hh"
 
+using namespace std;
+
 using expr_t = class ExprNode *;
 
 //! Types of auxiliary variables