636 lines
16 KiB
Markdown
636 lines
16 KiB
Markdown
# t00026 - Template memento pattern
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## Config
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```yaml
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diagrams:
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t00026_class:
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type: class
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glob:
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- t00026.cc
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using_namespace: clanguml::t00026
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include:
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namespaces:
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- clanguml::t00026
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```
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## Source code
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File `tests/t00026/t00026.cc`
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```cpp
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#include <iostream>
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#include <memory>
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#include <unordered_map>
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namespace clanguml {
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namespace t00026 {
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template <typename T> class Memento {
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public:
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Memento(T &&v)
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: m_value(std::forward<T>(v))
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{
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}
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T value() const { return m_value; }
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private:
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T m_value;
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};
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template <typename T> class Originator {
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public:
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Originator(T &&v)
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: m_value(std::forward<T>(v))
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{
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}
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Memento<T> memoize_value() const { return Memento<T>{m_value}; }
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void load(const Memento<T> &m) { m_value = m.value(); }
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void print() const { std::cout << m_value << std::endl; }
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void set(T &&v) { m_value = std::forward<T>(v); }
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private:
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T m_value;
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};
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template <typename T> class Caretaker {
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public:
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Memento<T> &state(const std::string &n) { return m_mementos.at(n); }
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void set_state(const std::string &s, Memento<T> &&m)
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{
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m_mementos.try_emplace(s, std::move(m));
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}
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private:
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std::unordered_map<std::string, Memento<T>> m_mementos;
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};
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struct StringMemento {
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Caretaker<std::string> caretaker;
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Originator<std::string> originator;
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};
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} // namespace t00026
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} // namespace clanguml
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```
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## Generated PlantUML diagrams
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## Generated Mermaid diagrams
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## Generated JSON models
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```json
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{
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"diagram_type": "class",
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"elements": [
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{
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"bases": [],
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"display_name": "Memento<T>",
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"id": "1241204213727905390",
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"is_abstract": false,
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"is_nested": false,
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"is_struct": false,
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"is_template": true,
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"is_union": false,
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"members": [
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{
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"access": "private",
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"is_static": false,
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"name": "m_value",
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"source_location": {
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"column": 7,
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"file": "t00026.cc",
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"line": 18,
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"translation_unit": "t00026.cc"
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},
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"type": "T"
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}
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],
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"methods": [
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{
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"access": "public",
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"is_const": false,
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"is_consteval": false,
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"is_constexpr": false,
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"is_constructor": true,
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"is_copy_assignment": false,
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"is_coroutine": false,
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"is_defaulted": false,
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"is_deleted": false,
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"is_move_assignment": false,
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"is_noexcept": false,
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"is_operator": false,
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"is_pure_virtual": false,
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"is_static": false,
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"is_virtual": false,
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"name": "Memento",
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"parameters": [
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{
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"name": "v",
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"type": "T &&"
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}
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],
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"source_location": {
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"column": 5,
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"file": "t00026.cc",
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"line": 10,
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"translation_unit": "t00026.cc"
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},
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"type": "void"
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},
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{
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"access": "public",
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"is_const": true,
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"is_consteval": false,
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"is_constexpr": false,
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"is_constructor": false,
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"is_copy_assignment": false,
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"is_coroutine": false,
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"is_defaulted": false,
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"is_deleted": false,
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"is_move_assignment": false,
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"is_noexcept": false,
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"is_operator": false,
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"is_pure_virtual": false,
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"is_static": false,
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"is_virtual": false,
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"name": "value",
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"parameters": [],
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"source_location": {
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"column": 7,
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"file": "t00026.cc",
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"line": 15,
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"translation_unit": "t00026.cc"
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},
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"type": "T"
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}
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],
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"name": "Memento",
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"namespace": "clanguml::t00026",
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"source_location": {
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"column": 29,
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"file": "t00026.cc",
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"line": 8,
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"translation_unit": "t00026.cc"
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},
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"template_parameters": [
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{
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"is_variadic": false,
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"kind": "template_type",
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"name": "T",
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"template_parameters": []
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}
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],
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"type": "class"
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},
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{
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"bases": [],
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"display_name": "Originator<T>",
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"id": "1324770803720816727",
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"is_abstract": false,
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"is_nested": false,
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"is_struct": false,
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"is_template": true,
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"is_union": false,
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"members": [
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{
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"access": "private",
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"is_static": false,
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"name": "m_value",
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"source_location": {
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"column": 7,
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"file": "t00026.cc",
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"line": 37,
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"translation_unit": "t00026.cc"
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},
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"type": "T"
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}
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],
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"methods": [
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{
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"access": "public",
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"is_const": false,
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"is_consteval": false,
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"is_constexpr": false,
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"is_constructor": true,
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"is_copy_assignment": false,
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"is_coroutine": false,
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"is_defaulted": false,
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"is_deleted": false,
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"is_move_assignment": false,
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"is_noexcept": false,
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"is_operator": false,
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"is_pure_virtual": false,
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"is_static": false,
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"is_virtual": false,
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"name": "Originator",
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"parameters": [
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{
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"name": "v",
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"type": "T &&"
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}
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],
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"source_location": {
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"column": 5,
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"file": "t00026.cc",
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"line": 23,
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"translation_unit": "t00026.cc"
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},
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"type": "void"
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},
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{
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"access": "public",
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"is_const": true,
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"is_consteval": false,
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"is_constexpr": false,
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"is_constructor": false,
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"is_copy_assignment": false,
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"is_coroutine": false,
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"is_defaulted": false,
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"is_deleted": false,
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"is_move_assignment": false,
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"is_noexcept": false,
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"is_operator": false,
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"is_pure_virtual": false,
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"is_static": false,
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"is_virtual": false,
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"name": "memoize_value",
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"parameters": [],
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"source_location": {
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"column": 16,
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"file": "t00026.cc",
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"line": 28,
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"translation_unit": "t00026.cc"
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},
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"type": "Memento<T>"
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},
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{
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"access": "public",
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"is_const": false,
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"is_consteval": false,
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"is_constexpr": false,
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"is_constructor": false,
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"is_copy_assignment": false,
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"is_coroutine": false,
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"is_defaulted": false,
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"is_deleted": false,
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"is_move_assignment": false,
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"is_noexcept": false,
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"is_operator": false,
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"is_pure_virtual": false,
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"is_static": false,
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"is_virtual": false,
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"name": "load",
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"parameters": [
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{
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"name": "m",
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"type": "const Memento<T> &"
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}
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],
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"source_location": {
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"column": 10,
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"file": "t00026.cc",
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"line": 30,
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"translation_unit": "t00026.cc"
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},
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"type": "void"
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},
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{
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"access": "public",
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"is_const": true,
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"is_consteval": false,
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"is_constexpr": false,
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"is_constructor": false,
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"is_copy_assignment": false,
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"is_coroutine": false,
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"is_defaulted": false,
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"is_deleted": false,
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"is_move_assignment": false,
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"is_noexcept": false,
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"is_operator": false,
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"is_pure_virtual": false,
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"is_static": false,
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"is_virtual": false,
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"name": "print",
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"parameters": [],
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"source_location": {
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"column": 10,
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"file": "t00026.cc",
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"line": 32,
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"translation_unit": "t00026.cc"
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},
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"type": "void"
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},
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{
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"access": "public",
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"is_const": false,
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"is_consteval": false,
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"is_constexpr": false,
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"is_constructor": false,
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"is_copy_assignment": false,
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"is_coroutine": false,
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"is_defaulted": false,
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"is_deleted": false,
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"is_move_assignment": false,
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"is_noexcept": false,
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"is_operator": false,
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"is_pure_virtual": false,
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"is_static": false,
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"is_virtual": false,
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"name": "set",
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"parameters": [
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{
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"name": "v",
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"type": "T &&"
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}
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],
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"source_location": {
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"column": 10,
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"file": "t00026.cc",
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"line": 34,
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"translation_unit": "t00026.cc"
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},
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"type": "void"
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}
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],
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"name": "Originator",
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"namespace": "clanguml::t00026",
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"source_location": {
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"column": 29,
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"file": "t00026.cc",
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"line": 21,
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"translation_unit": "t00026.cc"
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},
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"template_parameters": [
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{
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"is_variadic": false,
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"kind": "template_type",
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"name": "T",
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"template_parameters": []
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}
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],
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"type": "class"
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},
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{
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"bases": [],
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"display_name": "Caretaker<T>",
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"id": "2032715387182792204",
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"is_abstract": false,
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"is_nested": false,
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"is_struct": false,
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"is_template": true,
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"is_union": false,
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"members": [
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{
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"access": "private",
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"is_static": false,
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"name": "m_mementos",
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"source_location": {
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"column": 49,
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"file": "t00026.cc",
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"line": 50,
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"translation_unit": "t00026.cc"
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},
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"type": "std::unordered_map<std::string,Memento<T>>"
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}
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],
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"methods": [
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{
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"access": "public",
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"is_const": false,
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"is_consteval": false,
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"is_constexpr": false,
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"is_constructor": false,
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"is_copy_assignment": false,
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"is_coroutine": false,
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"is_defaulted": false,
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"is_deleted": false,
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"is_move_assignment": false,
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"is_noexcept": false,
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"is_operator": false,
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"is_pure_virtual": false,
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"is_static": false,
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"is_virtual": false,
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"name": "state",
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"parameters": [
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{
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"name": "n",
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"type": "const std::string &"
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}
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],
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"source_location": {
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"column": 17,
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"file": "t00026.cc",
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"line": 42,
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"translation_unit": "t00026.cc"
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},
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"type": "Memento<T> &"
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},
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{
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"access": "public",
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"is_const": false,
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"is_consteval": false,
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"is_constexpr": false,
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"is_constructor": false,
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"is_copy_assignment": false,
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"is_coroutine": false,
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"is_defaulted": false,
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"is_deleted": false,
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"is_move_assignment": false,
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"is_noexcept": false,
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"is_operator": false,
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"is_pure_virtual": false,
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"is_static": false,
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"is_virtual": false,
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"name": "set_state",
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"parameters": [
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{
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"name": "s",
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"type": "const std::string &"
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},
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{
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"name": "m",
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"type": "Memento<T> &&"
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}
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],
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"source_location": {
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"column": 10,
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"file": "t00026.cc",
|
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"line": 44,
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"translation_unit": "t00026.cc"
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},
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"type": "void"
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}
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],
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"name": "Caretaker",
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"namespace": "clanguml::t00026",
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"source_location": {
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"column": 29,
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"file": "t00026.cc",
|
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"line": 40,
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"translation_unit": "t00026.cc"
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},
|
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"template_parameters": [
|
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{
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"is_variadic": false,
|
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"kind": "template_type",
|
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"name": "T",
|
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"template_parameters": []
|
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}
|
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],
|
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"type": "class"
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},
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{
|
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"bases": [],
|
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"display_name": "Caretaker<std::string>",
|
|
"id": "1708482137721157489",
|
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"is_abstract": false,
|
|
"is_nested": false,
|
|
"is_struct": false,
|
|
"is_template": true,
|
|
"is_union": false,
|
|
"members": [],
|
|
"methods": [],
|
|
"name": "Caretaker",
|
|
"namespace": "clanguml::t00026",
|
|
"source_location": {
|
|
"column": 29,
|
|
"file": "t00026.cc",
|
|
"line": 40,
|
|
"translation_unit": "t00026.cc"
|
|
},
|
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"template_parameters": [
|
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{
|
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"is_variadic": false,
|
|
"kind": "argument",
|
|
"template_parameters": [],
|
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"type": "std::string"
|
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}
|
|
],
|
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"type": "class"
|
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},
|
|
{
|
|
"bases": [],
|
|
"display_name": "Originator<std::string>",
|
|
"id": "1014247960805363560",
|
|
"is_abstract": false,
|
|
"is_nested": false,
|
|
"is_struct": false,
|
|
"is_template": true,
|
|
"is_union": false,
|
|
"members": [],
|
|
"methods": [],
|
|
"name": "Originator",
|
|
"namespace": "clanguml::t00026",
|
|
"source_location": {
|
|
"column": 29,
|
|
"file": "t00026.cc",
|
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"line": 21,
|
|
"translation_unit": "t00026.cc"
|
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},
|
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"template_parameters": [
|
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{
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"is_variadic": false,
|
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"kind": "argument",
|
|
"template_parameters": [],
|
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"type": "std::string"
|
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}
|
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],
|
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"type": "class"
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},
|
|
{
|
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"bases": [],
|
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"display_name": "StringMemento",
|
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"id": "851750942915129289",
|
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"is_abstract": false,
|
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"is_nested": false,
|
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"is_struct": true,
|
|
"is_template": false,
|
|
"is_union": false,
|
|
"members": [
|
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{
|
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"access": "public",
|
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"is_static": false,
|
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"name": "caretaker",
|
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"source_location": {
|
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"column": 28,
|
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"file": "t00026.cc",
|
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"line": 54,
|
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"translation_unit": "t00026.cc"
|
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},
|
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"type": "Caretaker<std::string>"
|
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},
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{
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"access": "public",
|
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"is_static": false,
|
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"name": "originator",
|
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"source_location": {
|
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"column": 29,
|
|
"file": "t00026.cc",
|
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"line": 55,
|
|
"translation_unit": "t00026.cc"
|
|
},
|
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"type": "Originator<std::string>"
|
|
}
|
|
],
|
|
"methods": [],
|
|
"name": "StringMemento",
|
|
"namespace": "clanguml::t00026",
|
|
"source_location": {
|
|
"column": 8,
|
|
"file": "t00026.cc",
|
|
"line": 53,
|
|
"translation_unit": "t00026.cc"
|
|
},
|
|
"template_parameters": [],
|
|
"type": "class"
|
|
}
|
|
],
|
|
"name": "t00026_class",
|
|
"package_type": "namespace",
|
|
"relationships": [
|
|
{
|
|
"access": "public",
|
|
"destination": "1241204213727905390",
|
|
"source": "1324770803720816727",
|
|
"type": "dependency"
|
|
},
|
|
{
|
|
"access": "private",
|
|
"destination": "1241204213727905390",
|
|
"label": "m_mementos",
|
|
"source": "2032715387182792204",
|
|
"type": "aggregation"
|
|
},
|
|
{
|
|
"access": "public",
|
|
"destination": "2032715387182792204",
|
|
"source": "1708482137721157489",
|
|
"type": "instantiation"
|
|
},
|
|
{
|
|
"access": "public",
|
|
"destination": "1324770803720816727",
|
|
"source": "1014247960805363560",
|
|
"type": "instantiation"
|
|
},
|
|
{
|
|
"access": "public",
|
|
"destination": "1708482137721157489",
|
|
"label": "caretaker",
|
|
"source": "851750942915129289",
|
|
"type": "aggregation"
|
|
},
|
|
{
|
|
"access": "public",
|
|
"destination": "1014247960805363560",
|
|
"label": "originator",
|
|
"source": "851750942915129289",
|
|
"type": "aggregation"
|
|
}
|
|
],
|
|
"using_namespace": "clanguml::t00026"
|
|
}
|
|
```
|