Fix few warnings

src/language/node_processor/DoWhileProcessor.hpp

@@ -3,6 +3,7 @@
 
 #include <language/ast/ASTNode.hpp>
 #include <language/node_processor/INodeProcessor.hpp>
+#include <language/utils/SymbolTable.hpp>
 
 class DoWhileProcessor final : public INodeProcessor
 {

src/language/node_processor/ForProcessor.hpp

@@ -3,6 +3,7 @@
 
 #include <language/ast/ASTNode.hpp>
 #include <language/node_processor/INodeProcessor.hpp>
+#include <language/utils/SymbolTable.hpp>
 
 class ForProcessor final : public INodeProcessor
 {

src/language/node_processor/WhileProcessor.hpp

@@ -3,6 +3,7 @@
 
 #include <language/ast/ASTNode.hpp>
 #include <language/node_processor/INodeProcessor.hpp>
+#include <language/utils/SymbolTable.hpp>
 
 class WhileProcessor final : public INodeProcessor
 {

src/utils/Types.hpp

@@ -5,12 +5,12 @@ enum class ZeroType
 {
   zero
 };
-constexpr ZeroType zero = ZeroType::zero;
+constexpr inline ZeroType zero = ZeroType::zero;
 
 enum class IdentityType
 {
   identity
 };
-constexpr IdentityType identity = IdentityType::identity;
+constexpr inline IdentityType identity = IdentityType::identity;
 
 #endif   // TYPES_HPP