pmt: Add new type (class) to libhelper, etc.

- Add Helper::Capsule.
 - Fix some compilation errors.

srclib/libpartition_map/include/libpartition_map/lib.hpp

@@ -89,8 +89,8 @@ public:
   Info operator[](int index) const;
   BasicInf operator[](const std::string_view &name) const;
 
-  operator std::vector<Info>() const;
-  operator int() const;
+  explicit operator std::vector<Info>() const;
+  explicit operator int() const;
 
   class iterator {
   public:
@@ -166,7 +166,6 @@ public:
 
   /**
    *   Returns the current list content in Map_t type.
-   *   If no list is created, returns std::nullopt.
    */
   [[nodiscard]] Map_t getAll() const;
 
@@ -368,17 +367,17 @@ public:
   /**
    *   Get map contents as vector (PartitionManager::Info type).
    */
-  [[nodiscard]] operator std::vector<Info>() const;
+  [[nodiscard]] explicit operator std::vector<Info>() const;
 
   /**
    *   Get total partition count in map (int type).
    */
-  [[nodiscard]] operator int() const;
+  [[nodiscard]] explicit operator int() const;
 
   /**
    *   Get current working directory.
    */
-  [[nodiscard]] operator std::string() const;
+  [[nodiscard]] explicit operator std::string() const;
 };
 
 using Error = Helper::Error;

srclib/libpartition_map/src/PartitionMap.cpp

@@ -425,10 +425,12 @@ basic_partition_map_builder::operator[](const std::string_view &name) const {
 }
 
 basic_partition_map_builder::operator std::vector<Info>() const {
-  return _current_map;
+  return static_cast<std::vector<Info>>(_current_map);
 }
 
-basic_partition_map_builder::operator int() const { return _current_map; }
+basic_partition_map_builder::operator int() const {
+  return static_cast<int>(_current_map);
+}
 
 basic_partition_map_builder::operator std::string() const { return _workdir; }
 

srclib/libpartition_map/tests/test.cpp

@@ -55,9 +55,11 @@ int main() {
     for (const auto &name : *physicals)
       std::cout << "   - " << name << std::endl;
 
-    if (const std::vector<PartitionMap::Info> parts = MyMap; parts.empty())
+    if (const std::vector<PartitionMap::Info> parts =
+            static_cast<std::vector<PartitionMap::Info>>(MyMap);
+        parts.empty())
       throw PartitionMap::Error(
-          "operator std::vector>PartitionMap::Info>() returned empty vector");
+          "operator std::vector<PartitionMap::Info>() returned empty vector");
 
     auto func = [](const std::string &partition,
                    const PartitionMap::BasicInf props) -> bool {