Merge pull request #5 from bkryza/add-first-version-of-inline-directive-support

Add first version of inline directive support

docs/test_cases.md

@@ -26,6 +26,10 @@
  * [t00025](./test_cases/t00025.md) - Template proxy pattern
  * [t00026](./test_cases/t00026.md) - Template memento pattern
  * [t00027](./test_cases/t00027.md) - Template decorator pattern
+ * [t00028](./test_cases/t00028.md) - PlantUML note decorator test case
+ * [t00029](./test_cases/t00029.md) - PlantUML skip decorator test case
+ * [t00030](./test_cases/t00030.md) - PlantUML relationship decorators test case
+ * [t00031](./test_cases/t00031.md) - PlantUML style decorator test case
 ## Sequence diagrams
  * [t20001](./test_cases/t20001.md) - Basic sequence diagram
 ## Configuration diagrams

docs/test_cases/t00028.md

@@ -0,0 +1,80 @@
+# t00028 - PlantUML note decorator test case
+## Config
+```yaml
+compilation_database_dir: ..
+output_directory: puml
+diagrams:
+  t00028_class:
+    type: class
+    glob:
+      - ../../tests/t00028/t00028.cc
+    using_namespace:
+      - clanguml::t00028
+    include:
+      namespaces:
+        - clanguml::t00028
+
+```
+## Source code
+File t00028.cc
+```cpp
+#include <memory>
+#include <vector>
+
+namespace clanguml {
+namespace t00028 {
+
+/// \uml{note[top] A class note.}
+class A {
+};
+
+/// \uml{note[] B class note.}
+class B {
+};
+
+///
+/// @uml{note:t00028_class[bottom] C class note.}
+/// This is class C.
+class C {
+};
+
+/// \uml{note
+/// D
+/// class
+/// note.}
+class D {
+};
+
+/// \uml{note E template class note.}
+template <typename T> class E {
+    T param;
+};
+
+/// \uml{note:other_diagram[left] G class note.}
+class G {
+};
+
+/// @uml{note[ bottom ] F enum note.}
+enum class F { one, two, three };
+
+/// \uml{note[right] R class note.}
+class R {
+    A aaa;
+
+    B *bbb;
+
+    C &ccc;
+
+    std::vector<std::shared_ptr<D>> ddd;
+
+    E<int> eee;
+
+    G **ggg;
+};
+
+} // namespace t00028
+} // namespace clanguml
+
+```
+## Generated UML diagrams
+![t00028_class](./t00028_class.png "PlantUML note decorator test case")

docs/test_cases/t00029.md

@@ -0,0 +1,77 @@
+# t00029 - PlantUML skip decorator test case
+## Config
+```yaml
+compilation_database_dir: ..
+output_directory: puml
+diagrams:
+  t00029_class:
+    type: class
+    glob:
+      - ../../tests/t00029/t00029.cc
+    using_namespace:
+      - clanguml::t00029
+    include:
+      namespaces:
+        - clanguml::t00029
+
+```
+## Source code
+File t00029.cc
+```cpp
+#include <memory>
+#include <vector>
+
+namespace clanguml {
+namespace t00029 {
+
+class A {
+};
+
+/// \uml{skip}
+class B {
+};
+
+template <typename T> class C {
+    T param;
+};
+
+/// @uml{skip:t00029_class}
+template <typename T> class D {
+    T param;
+};
+
+enum class E { one, two, three };
+
+/// \uml{skip}
+enum class F { red, green, blue };
+
+class G1 {
+};
+
+class G2 {
+};
+
+class G3 {
+};
+
+class G4 {
+};
+
+struct R {
+    G1 g1;
+
+    /// \uml{skip}
+    G2 g2;
+
+    /// \uml{skiprelationship}
+    G3 &g3;
+
+    std::shared_ptr<G4> g4;
+};
+
+} // namespace t00029
+} // namespace clanguml
+
+```
+## Generated UML diagrams
+![t00029_class](./t00029_class.png "PlantUML skip decorator test case")

docs/test_cases/t00030.md

@@ -0,0 +1,58 @@
+# t00030 - PlantUML relationship decorators test case
+## Config
+```yaml
+compilation_database_dir: ..
+output_directory: puml
+diagrams:
+  t00030_class:
+    type: class
+    glob:
+      - ../../tests/t00030/t00030.cc
+    using_namespace:
+      - clanguml::t00030
+    include:
+      namespaces:
+        - clanguml::t00030
+
+```
+## Source code
+File t00030.cc
+```cpp
+#include <memory>
+#include <vector>
+
+namespace clanguml {
+namespace t00030 {
+
+class A {
+};
+
+class B {
+};
+
+class C {
+};
+
+class D {
+};
+
+struct R {
+    /// @uml{association[]}
+    A aaa;
+
+    /// @uml{composition[0..1:1..*]}
+    std::vector<B> bbb;
+
+    /// @uml{aggregation[0..1:1..5]}
+    std::vector<C> ccc;
+
+    /// @uml{association[:1]}
+    D ddd;
+};
+
+} // namespace t00030
+} // namespace clanguml
+
+```
+## Generated UML diagrams
+![t00030_class](./t00030_class.png "PlantUML relationship decorators test case")

docs/test_cases/t00031.md

@@ -0,0 +1,62 @@
+# t00031 - PlantUML style decorator test case
+## Config
+```yaml
+compilation_database_dir: ..
+output_directory: puml
+diagrams:
+  t00031_class:
+    type: class
+    glob:
+      - ../../tests/t00031/t00031.cc
+    using_namespace:
+      - clanguml::t00031
+    include:
+      namespaces:
+        - clanguml::t00031
+
+```
+## Source code
+File t00031.cc
+```cpp
+#include <memory>
+#include <vector>
+
+namespace clanguml {
+namespace t00031 {
+
+/// @uml{style[#back:lightgreen|yellow;header:blue/red]}
+class A {
+};
+
+/// @uml{style[#line.dotted:blue]}
+enum B { one, two, three };
+
+/// @uml{style[#pink;line:red;line.bold;text:red]}
+template <typename T> class C {
+    T ttt;
+};
+
+class D {
+};
+
+struct R {
+    /// @uml{style[#red,dashed,thickness=2]}
+    A *aaa;
+
+    /// @uml{composition}
+    /// @uml{style[#green,dashed,thickness=4]}
+    std::vector<B> bbb;
+
+    /// @uml{style[#blue,dotted,thickness=8]}
+    C<int> ccc;
+
+    /// @uml{style[#blue,plain,thickness=16]}
+    D *ddd;
+};
+
+} // namespace t00031
+} // namespace clanguml
+
+```
+## Generated UML diagrams
+![t00031_class](./t00031_class.png "PlantUML style decorator test case")

src/puml/class_diagram_generator.h

@@ -75,24 +75,24 @@ public:
         }
     }
 
-    std::string to_string(relationship_t r) const
+    std::string to_string(relationship_t r, std::string style = "") const
     {
         switch (r) {
         case relationship_t::kOwnership:
         case relationship_t::kComposition:
-            return "*--";
+            return style.empty() ? "*--" : fmt::format("*-[{}]-", style);
         case relationship_t::kAggregation:
-            return "o--";
+            return style.empty() ? "o--" : fmt::format("o-[{}]-", style);
         case relationship_t::kContainment:
-            return "--+";
+            return style.empty() ? "--+" : fmt::format("-[{}]-+", style);
         case relationship_t::kAssociation:
-            return "-->";
+            return style.empty() ? "-->" : fmt::format("-[{}]->", style);
         case relationship_t::kInstantiation:
-            return "..|>";
+            return style.empty() ? "..|>" : fmt::format(".[{}].|>", style);
         case relationship_t::kFriendship:
-            return "<..";
+            return style.empty() ? "<.." : fmt::format("<.[{}].", style);
         case relationship_t::kDependency:
-            return "..>";
+            return style.empty() ? "..>" : fmt::format(".[{}].>", style);
         default:
             return "";
         }
@@ -129,7 +129,7 @@ public:
 
         ostr << class_type << " \"" << c.full_name(m_config.using_namespace);
 
-        ostr << "\" as " << c.alias() << std::endl;
+        ostr << "\" as " << c.alias() << '\n';
     }
 
     void generate_alias(const enum_ &e, std::ostream &ostr) const
@@ -137,7 +137,7 @@ public:
         ostr << "enum"
              << " \"" << e.full_name(m_config.using_namespace);
 
-        ostr << "\" as " << e.alias() << std::endl;
+        ostr << "\" as " << e.alias() << '\n';
     }
 
     void generate(const class_ &c, std::ostream &ostr) const
@@ -149,7 +149,12 @@ public:
         if (c.is_abstract())
             class_type = "abstract";
 
-        ostr << class_type << " " << c.alias() << " {" << std::endl;
+        ostr << class_type << " " << c.alias();
+
+        if (!c.style.empty())
+            ostr << " " << c.style;
+
+        ostr << " {" << '\n';
 
         //
         // Process methods
@@ -192,7 +197,7 @@ public:
 
             ostr << " : " << ns_relative(uns, type);
 
-            ostr << std::endl;
+            ostr << '\n';
         }
 
         //
@@ -224,9 +229,18 @@ public:
                     destination = r.destination;
                 }
 
+                std::string puml_relation;
+                if (!r.multiplicity_source.empty())
+                    puml_relation += "\"" + r.multiplicity_source + "\" ";
+
+                puml_relation += to_string(r.type, r.style);
+
+                if (!r.multiplicity_destination.empty())
+                    puml_relation += " \"" + r.multiplicity_destination + "\"";
+
                 relstr << m_model.to_alias(
                               uns, ns_relative(uns, c.full_name(uns)))
-                       << " " << to_string(r.type) << " "
+                       << " " << puml_relation << " "
                        << m_model.to_alias(uns, ns_relative(uns, destination));
 
                 if (!r.label.empty()) {
@@ -234,7 +248,7 @@ public:
                     rendered_relations.emplace(r.label);
                 }
 
-                relstr << std::endl;
+                relstr << '\n';
 
                 all_relations_str << relstr.str();
             }
@@ -260,10 +274,10 @@ public:
                 ostr << "{static} ";
 
             ostr << to_string(m.scope) << m.name << " : "
-                 << ns_relative(uns, m.type) << std::endl;
+                 << ns_relative(uns, m.type) << '\n';
         }
 
-        ostr << "}" << std::endl;
+        ostr << "}" << '\n';
 
         if (m_config.should_include_relationship("inheritance"))
             for (const auto &b : c.bases) {
@@ -273,7 +287,7 @@ public:
                            << " <|-- "
                            << m_model.to_alias(
                                   uns, ns_relative(uns, c.full_name(uns)))
-                           << std::endl;
+                           << '\n';
                     ostr << relstr.str();
                 }
                 catch (error::uml_alias_missing &e) {
@@ -283,19 +297,36 @@ public:
                 }
             }
 
+        //
+        // Process notes
+        //
+        for (auto decorator : c.decorators) {
+            auto note = std::dynamic_pointer_cast<decorators::note>(decorator);
+            if (note && note->applies_to_diagram(m_config.name)) {
+                ostr << "note " << note->position << " of " << c.alias() << '\n'
+                     << note->text << '\n'
+                     << "end note\n";
+            }
+        }
+
         // Print relationships
         ostr << all_relations_str.str();
     }
 
     void generate(const enum_ &e, std::ostream &ostr) const
     {
-        ostr << "enum " << e.alias() << " {" << std::endl;
+        ostr << "enum " << e.alias();
+
+        if (!e.style.empty())
+            ostr << " " << e.style;
+
+        ostr << " {" << '\n';
 
         for (const auto &enum_constant : e.constants) {
-            ostr << enum_constant << std::endl;
+            ostr << enum_constant << '\n';
         }
 
-        ostr << "}" << std::endl;
+        ostr << "}" << '\n';
 
         for (const auto &r : e.relationships) {
             if (!m_config.should_include_relationship(name(r.type)))
@@ -327,7 +358,8 @@ public:
                 if (!r.label.empty())
                     relstr << " : " << r.label;
 
-                relstr << std::endl;
+                relstr << '\n';
+
                 ostr << relstr.str();
             }
             catch (error::uml_alias_missing &ex) {
@@ -336,11 +368,23 @@ public:
                     to_string(r.type), e.name, destination, ex.what());
             }
         }
+
+        //
+        // Process notes
+        //
+        for (auto decorator : e.decorators) {
+            auto note = std::dynamic_pointer_cast<decorators::note>(decorator);
+            if (note && note->applies_to_diagram(m_config.name)) {
+                ostr << "note " << note->position << " of " << e.alias() << '\n'
+                     << note->text << '\n'
+                     << "end note\n";
+            }
+        }
     }
 
     void generate(std::ostream &ostr) const
     {
-        ostr << "@startuml" << std::endl;
+        ostr << "@startuml" << '\n';
 
         for (const auto &b : m_config.puml.before) {
             std::string note{b};
@@ -352,7 +396,7 @@ public:
                 note.replace(
                     std::get<1>(alias_match), std::get<2>(alias_match), alias);
             }
-            ostr << note << std::endl;
+            ostr << note << '\n';
         }
 
         if (m_config.should_include_entities("classes")) {
@@ -361,14 +405,14 @@ public:
                     !m_config.should_include(c.name))
                     continue;
                 generate_alias(c, ostr);
-                ostr << std::endl;
+                ostr << '\n';
             }
 
             for (const auto &e : m_model.enums) {
                 if (!m_config.should_include(e.name))
                     continue;
                 generate_alias(e, ostr);
-                ostr << std::endl;
+                ostr << '\n';
             }
 
             for (const auto &c : m_model.classes) {
@@ -376,14 +420,14 @@ public:
                     !m_config.should_include(c.name))
                     continue;
                 generate(c, ostr);
-                ostr << std::endl;
+                ostr << '\n';
             }
         }
 
         if (m_config.should_include_entities("enums"))
             for (const auto &e : m_model.enums) {
                 generate(e, ostr);
-                ostr << std::endl;
+                ostr << '\n';
             }
 
         // Process aliases in any of the puml directives
@@ -397,10 +441,10 @@ public:
                 note.replace(
                     std::get<1>(alias_match), std::get<2>(alias_match), alias);
             }
-            ostr << note << std::endl;
+            ostr << note << '\n';
         }
 
-        ostr << "@enduml" << std::endl;
+        ostr << "@enduml" << '\n';
     }
 
     friend std::ostream &operator<<(std::ostream &os, const generator &g);

src/uml/class_diagram_model.h

@@ -17,6 +17,7 @@
  */
 #pragma once
 
+#include "decorators.h"
 #include "util/error.h"
 #include "util/util.h"
 
@@ -53,7 +54,61 @@ enum class relationship_t {
 
 std::string to_string(relationship_t r);
 
-class element {
+struct stylable_element {
+    std::string style;
+};
+
+struct decorated_element {
+    std::vector<std::shared_ptr<decorators::decorator>> decorators;
+
+    bool skip() const
+    {
+        for (auto d : decorators)
+            if (std::dynamic_pointer_cast<decorators::skip>(d))
+                return true;
+
+        return false;
+    }
+
+    bool skip_relationship() const
+    {
+        for (auto d : decorators)
+            if (std::dynamic_pointer_cast<decorators::skip_relationship>(d))
+                return true;
+
+        return false;
+    }
+
+    std::pair<relationship_t, std::string> relationship() const
+    {
+        for (auto &d : decorators)
+            if (std::dynamic_pointer_cast<decorators::association>(d))
+                return {relationship_t::kAssociation,
+                    std::dynamic_pointer_cast<decorators::relationship>(d)
+                        ->multiplicity};
+            else if (std::dynamic_pointer_cast<decorators::aggregation>(d))
+                return {relationship_t::kAggregation,
+                    std::dynamic_pointer_cast<decorators::relationship>(d)
+                        ->multiplicity};
+            else if (std::dynamic_pointer_cast<decorators::composition>(d))
+                return {relationship_t::kComposition,
+                    std::dynamic_pointer_cast<decorators::relationship>(d)
+                        ->multiplicity};
+
+        return {relationship_t::kNone, ""};
+    }
+
+    std::string style_spec()
+    {
+        for (auto d : decorators)
+            if (std::dynamic_pointer_cast<decorators::style>(d))
+                return std::dynamic_pointer_cast<decorators::style>(d)->spec;
+
+        return "";
+    }
+};
+
+class element : public decorated_element {
 public:
     element()
         : m_id{m_nextId++}
@@ -71,7 +126,7 @@ private:
     static std::atomic_uint64_t m_nextId;
 };
 
-struct class_element {
+struct class_element : public decorated_element {
     scope_t scope;
     std::string name;
     std::string type;
@@ -82,7 +137,7 @@ struct class_member : public class_element {
     bool is_static{false};
 };
 
-struct method_parameter {
+struct method_parameter : public decorated_element {
     std::string type;
     std::string name;
     std::string default_value;
@@ -115,11 +170,11 @@ struct class_parent {
     access_t access;
 };
 
-struct class_relationship {
+struct class_relationship : public decorated_element, public stylable_element {
     relationship_t type{relationship_t::kAssociation};
     std::string destination;
-    std::string cardinality_source;
-    std::string cardinality_destination;
+    std::string multiplicity_source;
+    std::string multiplicity_destination;
     std::string label;
     scope_t scope{scope_t::kNone};
 
@@ -148,7 +203,7 @@ struct type_alias {
     std::string underlying_type;
 };
 
-class class_ : public element {
+class class_ : public element, public stylable_element {
 public:
     std::string usr;
     bool is_struct{false};
@@ -233,7 +288,7 @@ public:
     }
 };
 
-struct enum_ : public element {
+struct enum_ : public element, public stylable_element {
     std::vector<std::string> constants;
     std::vector<class_relationship> relationships;
 

src/uml/class_diagram_visitor.cc

@@ -193,6 +193,18 @@ void tu_visitor::process_enum_declaration(const cppast::cpp_enum &enm)
     enum_ e;
     e.name = cx::util::full_name(ctx.namespace_, enm);
 
+    if (enm.comment().has_value())
+        e.decorators = decorators::parse(enm.comment().value());
+
+    if (e.skip())
+        return;
+
+    e.style = e.style_spec();
+
+    // Process enum documentation comment
+    if (enm.comment().has_value())
+        e.decorators = decorators::parse(enm.comment().value());
+
     for (const auto &ev : enm) {
         if (ev.kind() == cppast::cpp_entity_kind::enum_value_t) {
             e.constants.push_back(ev.name());
@@ -226,9 +238,28 @@ void tu_visitor::process_class_declaration(const cppast::cpp_class &cls,
     c.is_struct = cls.class_kind() == cppast::cpp_class_kind::struct_t;
     c.name = cx::util::full_name(ctx.namespace_, cls);
 
+    if (cls.comment().has_value())
+        c.decorators = decorators::parse(cls.comment().value());
+
     cppast::cpp_access_specifier_kind last_access_specifier =
         cppast::cpp_access_specifier_kind::cpp_private;
 
+    // Process class documentation comment
+    if (cppast::is_templated(cls)) {
+        if (cls.parent().value().comment().has_value())
+            c.decorators =
+                decorators::parse(cls.parent().value().comment().value());
+    }
+    else {
+        if (cls.comment().has_value())
+            c.decorators = decorators::parse(cls.comment().value());
+    }
+
+    if (c.skip())
+        return;
+
+    c.style = c.style_spec();
+
     // Process class child entities
     if (c.is_struct)
         last_access_specifier = cppast::cpp_access_specifier_kind::cpp_public;
@@ -240,7 +271,6 @@ void tu_visitor::process_class_declaration(const cppast::cpp_class &cls,
         }
         else if (child.kind() == cppast::cpp_entity_kind::member_variable_t) {
             auto &mv = static_cast<const cppast::cpp_member_variable &>(child);
-            LOG_DBG("Found member variable {}", mv.name());
             process_field(mv, c, last_access_specifier);
         }
         else if (child.kind() == cppast::cpp_entity_kind::variable_t) {
@@ -489,7 +519,7 @@ void tu_visitor::process_class_declaration(const cppast::cpp_class &cls,
 
 bool tu_visitor::process_field_with_template_instantiation(
     const cppast::cpp_member_variable &mv, const cppast::cpp_type &tr,
-    class_ &c, cppast::cpp_access_specifier_kind as)
+    class_ &c, class_member &m, cppast::cpp_access_specifier_kind as)
 {
     LOG_DBG("Processing field with template instatiation type {}",
         cppast::to_string(tr));
@@ -546,6 +576,17 @@ bool tu_visitor::process_field_with_template_instantiation(
                 rr.type = relationship_t::kAggregation;
             rr.label = mv.name();
             rr.scope = detail::cpp_access_specifier_to_scope(as);
+            rr.style = m.style_spec();
+
+            auto [decorator_rtype, decorator_rmult] = m.relationship();
+            if (decorator_rtype != relationship_t::kNone) {
+                rr.type = decorator_rtype;
+                auto mult = util::split(decorator_rmult, ":");
+                if (mult.size() == 2) {
+                    rr.multiplicity_source = mult[0];
+                    rr.multiplicity_destination = mult[1];
+                }
+            }
 
             LOG_DBG("Adding field instantiation relationship {} {} {} : {}",
                 rr.destination, model::class_diagram::to_string(rr.type), c.usr,
@@ -576,6 +617,12 @@ void tu_visitor::process_field(const cppast::cpp_member_variable &mv, class_ &c,
     m.scope = detail::cpp_access_specifier_to_scope(as);
     m.is_static = false;
 
+    if (mv.comment().has_value())
+        m.decorators = decorators::parse(mv.comment().value());
+
+    if (m.skip())
+        return;
+
     auto &tr = cx::util::unreferenced(cppast::remove_cv(mv.type()));
 
     LOG_DBG("Processing field {} with unreferenced type of kind {}", mv.name(),
@@ -591,7 +638,7 @@ void tu_visitor::process_field(const cppast::cpp_member_variable &mv, class_ &c,
     else if (tr.kind() == cppast::cpp_type_kind::template_instantiation_t) {
         template_instantiation_added_as_aggregation =
             process_field_with_template_instantiation(
-                mv, resolve_alias(tr), c, as);
+                mv, resolve_alias(tr), c, m, as);
     }
     else if (tr.kind() == cppast::cpp_type_kind::unexposed_t) {
         LOG_DBG(
@@ -599,7 +646,8 @@ void tu_visitor::process_field(const cppast::cpp_member_variable &mv, class_ &c,
         // TODO
     }
 
-    if (!template_instantiation_added_as_aggregation &&
+    if (!m.skip_relationship() &&
+        !template_instantiation_added_as_aggregation &&
         (tr.kind() != cppast::cpp_type_kind::builtin_t) &&
         (tr.kind() != cppast::cpp_type_kind::template_parameter_t)) {
         const auto &ttt = resolve_alias(mv.type());
@@ -613,6 +661,17 @@ void tu_visitor::process_field(const cppast::cpp_member_variable &mv, class_ &c,
                 r.type = relationship_type;
                 r.label = m.name;
                 r.scope = m.scope;
+                r.style = m.style_spec();
+
+                auto [decorator_rtype, decorator_rmult] = m.relationship();
+                if (decorator_rtype != relationship_t::kNone) {
+                    r.type = decorator_rtype;
+                    auto mult = util::split(decorator_rmult, ":");
+                    if (mult.size() == 2) {
+                        r.multiplicity_source = mult[0];
+                        r.multiplicity_destination = mult[1];
+                    }
+                }
 
                 LOG_DBG("Adding field relationship {} {} {} : {}",
                     r.destination, model::class_diagram::to_string(r.type),
@@ -650,6 +709,12 @@ void tu_visitor::process_static_field(const cppast::cpp_variable &mv, class_ &c,
     m.scope = detail::cpp_access_specifier_to_scope(as);
     m.is_static = true;
 
+    if (mv.comment().has_value())
+        m.decorators = decorators::parse(mv.comment().value());
+
+    if (m.skip())
+        return;
+
     c.members.emplace_back(std::move(m));
 }
 
@@ -666,6 +731,12 @@ void tu_visitor::process_method(const cppast::cpp_member_function &mf,
     m.is_static = false;
     m.scope = detail::cpp_access_specifier_to_scope(as);
 
+    if (mf.comment().has_value())
+        m.decorators = decorators::parse(mf.comment().value());
+
+    if (m.skip())
+        return;
+
     for (auto &param : mf.parameters())
         process_function_parameter(param, m, c);
 
@@ -695,6 +766,12 @@ void tu_visitor::process_template_method(
     m.is_static = false;
     m.scope = detail::cpp_access_specifier_to_scope(as);
 
+    if (mf.comment().has_value())
+        m.decorators = decorators::parse(mf.comment().value());
+
+    if (m.skip())
+        return;
+
     for (auto &param : mf.function().parameters())
         process_function_parameter(param, m, c);
 
@@ -716,6 +793,12 @@ void tu_visitor::process_static_method(const cppast::cpp_function &mf,
     m.is_static = true;
     m.scope = detail::cpp_access_specifier_to_scope(as);
 
+    if (mf.comment().has_value())
+        m.decorators = decorators::parse(mf.comment().value());
+
+    if (m.skip())
+        return;
+
     for (auto &param : mf.parameters())
         process_function_parameter(param, m, c);
 
@@ -737,6 +820,12 @@ void tu_visitor::process_constructor(const cppast::cpp_constructor &mf,
     m.is_static = false;
     m.scope = detail::cpp_access_specifier_to_scope(as);
 
+    if (mf.comment().has_value())
+        m.decorators = decorators::parse(mf.comment().value());
+
+    if (m.skip())
+        return;
+
     for (auto &param : mf.parameters())
         process_function_parameter(param, m, c);
 
@@ -764,6 +853,13 @@ void tu_visitor::process_function_parameter(
 {
     method_parameter mp;
     mp.name = param.name();
+
+    if (param.comment().has_value())
+        m.decorators = decorators::parse(param.comment().value());
+
+    if (mp.skip())
+        return;
+
     const auto &param_type =
         cppast::remove_cv(cx::util::unreferenced(param.type()));
     if (param_type.kind() == cppast::cpp_type_kind::template_instantiation_t) {
@@ -777,7 +873,7 @@ void tu_visitor::process_function_parameter(
     }
 
     auto dv = param.default_value();
-    if (dv)
+    if (dv) {
         switch (dv.value().kind()) {
         case cppast::cpp_expression_kind::literal_t:
             mp.default_value =
@@ -794,20 +890,24 @@ void tu_visitor::process_function_parameter(
         default:
             mp.default_value = "{}";
         }
+    }
 
+    if (!mp.skip_relationship()) {
         // find relationship for the type
         std::vector<std::pair<std::string, relationship_t>> relationships;
         find_relationships(cppast::remove_cv(param.type()), relationships,
             relationship_t::kDependency);
         for (const auto &[type, relationship_type] : relationships) {
-        if ((relationship_type != relationship_t::kNone) && (type != c.name)) {
+            if ((relationship_type != relationship_t::kNone) &&
+                (type != c.name)) {
                 class_relationship r;
                 r.destination = type;
                 r.type = relationship_t::kDependency;
                 r.label = "";
 
-            LOG_DBG("Adding field relationship {} {} {} : {}", r.destination,
-                model::class_diagram::to_string(r.type), c.usr, r.label);
+                LOG_DBG("Adding field relationship {} {} {} : {}",
+                    r.destination, model::class_diagram::to_string(r.type),
+                    c.usr, r.label);
 
                 c.add_relationship(std::move(r));
             }
@@ -828,15 +928,15 @@ void tu_visitor::process_function_parameter(
                         .get(ctx.entity_index)[0]
                         .get());
 
-            LOG_DBG(
-                "Maybe building instantiation for: {}", primary_template_name);
+                LOG_DBG("Maybe building instantiation for: {}",
+                    primary_template_name);
 
                 if (ctx.config.should_include(primary_template_name)) {
-                class_ tinst =
-                    build_template_instantiation(template_instantiation_type);
+                    class_ tinst = build_template_instantiation(
+                        template_instantiation_type);
 
-                LOG_DBG("Created template instantiation: {}, {}", tinst.name,
-                    tinst.usr);
+                    LOG_DBG("Created template instantiation: {}, {}",
+                        tinst.name, tinst.usr);
 
                     class_relationship r;
                     r.destination = tinst.base_template_usr;
@@ -848,15 +948,18 @@ void tu_visitor::process_function_parameter(
                     rr.destination = tinst.usr;
                     rr.type = relationship_t::kDependency;
                     rr.label = "";
-                LOG_DBG("Adding field dependency relationship {} {} {} : {}",
-                    rr.destination, model::class_diagram::to_string(rr.type),
-                    c.usr, rr.label);
+                    LOG_DBG(
+                        "Adding field dependency relationship {} {} {} : {}",
+                        rr.destination,
+                        model::class_diagram::to_string(rr.type), c.usr,
+                        rr.label);
                     c.add_relationship(std::move(rr));
 
                     ctx.d.add_class(std::move(tinst));
                 }
             }
         }
+    }
 
     m.parameters.emplace_back(std::move(mp));
 }
@@ -910,6 +1013,12 @@ void tu_visitor::process_friend(const cppast::cpp_friend &f, class_ &parent)
     r.type = relationship_t::kFriendship;
     r.label = "<<friend>>";
 
+    if (f.comment().has_value())
+        r.decorators = decorators::parse(f.comment().value());
+
+    if (r.skip() || r.skip_relationship())
+        return;
+
     if (f.type()) {
         auto name = cppast::to_string(f.type().value());
 

src/uml/class_diagram_visitor.h

@@ -166,6 +166,7 @@ public:
     bool process_field_with_template_instantiation(
         const cppast::cpp_member_variable &mv, const cppast::cpp_type &tr,
         clanguml::model::class_diagram::class_ &c,
+        clanguml::model::class_diagram::class_member &m,
         cppast::cpp_access_specifier_kind as);
 
     void process_static_field(const cppast::cpp_variable &mv,

src/uml/decorators.cc

@@ -0,0 +1,219 @@
+/**
+ * src/uml/decorators.cc
+ *
+ * Copyright (c) 2021 Bartek Kryza <bkryza@gmail.com>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#include "decorators.h"
+
+#include "util/util.h"
+
+#include <string>
+#include <string_view>
+
+namespace clanguml {
+namespace decorators {
+
+const std::string note::label = "note";
+const std::string skip::label = "skip";
+const std::string skip_relationship::label = "skiprelationship";
+const std::string style::label = "style";
+const std::string aggregation::label = "aggregation";
+const std::string composition::label = "composition";
+const std::string association::label = "association";
+
+std::shared_ptr<decorator> decorator::from_string(std::string_view c)
+{
+    if (c.find(note::label) == 0) {
+        return note::from_string(c);
+    }
+    else if (c.find(skip_relationship::label) == 0) {
+        return skip_relationship::from_string(c);
+    }
+    else if (c.find(skip::label) == 0) {
+        return skip::from_string(c);
+    }
+    else if (c.find(style::label) == 0) {
+        return style::from_string(c);
+    }
+    else if (c.find(aggregation::label) == 0) {
+        return aggregation::from_string(c);
+    }
+    else if (c.find(composition::label) == 0) {
+        return composition::from_string(c);
+    }
+    else if (c.find(association::label) == 0) {
+        return association::from_string(c);
+    }
+
+    return {};
+}
+
+bool decorator::applies_to_diagram(std::string name)
+{
+    return diagrams.empty() ||
+        (std::find(diagrams.begin(), diagrams.end(), name) != diagrams.end());
+}
+
+decorator_toks decorator::tokenize(const std::string &label, std::string_view c)
+{
+    decorator_toks res;
+    res.label = label;
+    size_t pos{};
+    auto it = c.begin();
+    std::advance(it, label.size());
+
+    if (*it == ':') {
+        std::advance(it, 1);
+
+        pos = std::distance(c.begin(), it);
+        // If the diagram list is provided after ':', [] is mandatory
+        // even if empty
+        auto d = c.substr(pos, c.find("[", pos) - pos);
+        if (!d.empty()) {
+            std::string d_str{d};
+            d_str.erase(std::remove_if(d_str.begin(), d_str.end(),
+                            (int (*)(int))std::isspace),
+                d_str.end());
+            res.diagrams = util::split(d_str, ",");
+        }
+
+        std::advance(it, d.size());
+    }
+
+    if (*it == '[') {
+        std::advance(it, 1);
+
+        pos = std::distance(c.begin(), it);
+        res.param = c.substr(pos, c.find("]", pos) - pos);
+
+        std::advance(it, res.param.size() + 1);
+    }
+    else if (std::isspace(*it)) {
+        std::advance(it, 1);
+    }
+
+    pos = std::distance(c.begin(), it);
+    res.text = c.substr(pos, c.find("}", pos) - pos);
+    res.text = util::trim(res.text);
+    res.param = util::trim(res.param);
+
+    return res;
+}
+
+std::shared_ptr<decorator> note::from_string(std::string_view c)
+{
+    auto res = std::make_shared<note>();
+    auto toks = res->tokenize(note::label, c);
+
+    res->diagrams = toks.diagrams;
+
+    if (!toks.param.empty())
+        res->position = toks.param;
+
+    res->text = toks.text;
+
+    return res;
+}
+
+std::shared_ptr<decorator> skip::from_string(std::string_view c)
+{
+    return std::make_shared<skip>();
+}
+
+std::shared_ptr<decorator> skip_relationship::from_string(std::string_view c)
+{
+    return std::make_shared<skip_relationship>();
+}
+
+std::shared_ptr<decorator> style::from_string(std::string_view c)
+{
+    auto res = std::make_shared<style>();
+    auto toks = res->tokenize(style::label, c);
+
+    res->diagrams = toks.diagrams;
+    res->spec = toks.param;
+
+    return res;
+}
+
+std::shared_ptr<decorator> aggregation::from_string(std::string_view c)
+{
+    auto res = std::make_shared<aggregation>();
+    auto toks = res->tokenize(aggregation::label, c);
+
+    res->diagrams = toks.diagrams;
+    res->multiplicity = toks.param;
+
+    return res;
+}
+
+std::shared_ptr<decorator> composition::from_string(std::string_view c)
+{
+    auto res = std::make_shared<composition>();
+    auto toks = res->tokenize(composition::label, c);
+
+    res->diagrams = toks.diagrams;
+    res->multiplicity = toks.param;
+
+    return res;
+}
+
+std::shared_ptr<decorator> association::from_string(std::string_view c)
+{
+    auto res = std::make_shared<association>();
+    auto toks = res->tokenize(association::label, c);
+
+    res->diagrams = toks.diagrams;
+    res->multiplicity = toks.param;
+
+    return res;
+}
+
+std::vector<std::shared_ptr<decorator>> parse(
+    std::string documentation_block, std::string clanguml_tag)
+{
+    std::vector<std::shared_ptr<decorator>> res;
+    const std::string begin_tag{"@" + clanguml_tag};
+    const auto begin_tag_size = begin_tag.size();
+
+    // First replace all \uml occurences with @uml
+    util::replace_all(
+        documentation_block, "\\" + clanguml_tag, "@" + clanguml_tag);
+    documentation_block = util::trim(documentation_block);
+
+    std::string_view block_view{documentation_block};
+
+    auto pos = block_view.find("@" + clanguml_tag + "{");
+    while (pos < documentation_block.size()) {
+        auto c_begin = pos + begin_tag_size;
+        auto c_end = documentation_block.find("}", c_begin);
+
+        if (c_end == std::string::npos)
+            return res;
+
+        auto com =
+            decorator::from_string(block_view.substr(c_begin + 1, c_end - 2));
+
+        if (com)
+            res.emplace_back(std::move(com));
+
+        pos = block_view.find("@" + clanguml_tag + "{", c_end);
+    }
+
+    return res;
+};
+
+} // namespace decorators
+} // namespace clanguml

src/uml/decorators.h

@@ -0,0 +1,101 @@
+/**
+ * src/uml/decorators.h
+ *
+ * Copyright (c) 2021 Bartek Kryza <bkryza@gmail.com>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#pragma once
+
+#include <functional>
+#include <map>
+#include <memory>
+#include <string>
+
+namespace clanguml {
+namespace decorators {
+struct decorator_toks {
+    std::string label;
+    std::vector<std::string> diagrams;
+    std::string param;
+    std::string text;
+};
+
+struct decorator {
+    std::vector<std::string> diagrams;
+
+    virtual ~decorator() = default;
+
+    static std::shared_ptr<decorator> from_string(std::string_view c);
+
+    bool applies_to_diagram(std::string name);
+
+protected:
+    decorator_toks tokenize(const std::string &label, std::string_view c);
+};
+
+struct note : public decorator {
+    static const std::string label;
+
+    std::string position{"left"};
+    std::string text;
+
+    static std::shared_ptr<decorator> from_string(std::string_view c);
+};
+
+struct skip : public decorator {
+    static const std::string label;
+
+    static std::shared_ptr<decorator> from_string(std::string_view c);
+};
+
+struct skip_relationship : public decorator {
+    static const std::string label;
+
+    static std::shared_ptr<decorator> from_string(std::string_view c);
+};
+
+struct style : public decorator {
+    static const std::string label;
+
+    std::string spec;
+    static std::shared_ptr<decorator> from_string(std::string_view c);
+};
+
+struct relationship : public decorator {
+    std::string multiplicity;
+};
+
+struct aggregation : public relationship {
+    static const std::string label;
+
+    static std::shared_ptr<decorator> from_string(std::string_view c);
+};
+
+struct composition : public relationship {
+    static const std::string label;
+
+    static std::shared_ptr<decorator> from_string(std::string_view c);
+};
+
+struct association : public relationship {
+    static const std::string label;
+
+    static std::shared_ptr<decorator> from_string(std::string_view c);
+};
+
+std::vector<std::shared_ptr<decorator>> parse(
+    std::string documentation_block, std::string clanguml_tag = "uml");
+
+} // namespace decorators
+} // namespace clanguml

src/util/util.cc

@@ -126,5 +126,20 @@ bool find_element_alias(
 
     return true;
 }
+
+bool replace_all(
+    std::string &input, std::string pattern, std::string replace_with)
+{
+    bool replaced{false};
+
+    auto pos = input.find(pattern);
+    while (pos < input.size()) {
+        input.replace(pos, pattern.size(), replace_with);
+        pos = input.find(pattern, pos + replace_with.size());
+        replaced = true;
+    }
+
+    return replaced;
+}
 }
 }

src/util/util.h

@@ -104,5 +104,15 @@ std::string unqualify(const std::string &s);
  */
 bool find_element_alias(
     const std::string &input, std::tuple<std::string, size_t, size_t> &result);
+
+/**
+ * @brief Find and replace in string
+ *
+ * Replaces all occurences of pattern with replace_with in input string.
+ *
+ * @return True if at least on replacement was made
+ */
+bool replace_all(
+    std::string &input, std::string pattern, std::string replace_with);
 }
 }

tests/CMakeLists.txt

@@ -23,6 +23,14 @@ set(CLANG_UML_TEST_CASES_HEADER
     catch.h
 )
 
+set(CLANG_UML_TEST_DECORATOR_PARSER_SRC
+    test_decorator_parser.cc
+    ${TEST_UTIL_SOURCES}
+)
+set(CLANG_UML_TEST_DECORATOR_PARSER_HEADER
+    catch.h
+)
+
 add_executable(test_util
     ${CLANG_UML_TEST_UTIL_SRC}
     ${CLANG_UML_TEST_UTIL_HEADER})
@@ -33,6 +41,15 @@ target_link_libraries(test_util
     ${YAML_CPP_LIBRARIES}
     spdlog::spdlog clang-umllib cppast)
 
+add_executable(test_decorator_parser
+    ${CLANG_UML_TEST_DECORATOR_PARSER_SRC}
+    ${CLANG_UML_TEST_DECORATOR_PARSER_HEADER})
+
+target_link_libraries(test_decorator_parser
+    PRIVATE
+    ${LIBCLANG_LIBRARIES}
+    ${YAML_CPP_LIBRARIES}
+    spdlog::spdlog clang-umllib cppast)
 
 add_executable(test_cases
     ${CLANG_UML_TEST_CASES_SRC}
@@ -57,4 +74,5 @@ foreach(TEST_CASE_CONFIG ${TEST_CASE_CONFIGS})
 endforeach()
 
 add_test(NAME test_util COMMAND test_util)
+add_test(NAME test_decorator_parser COMMAND test_decorator_parser)
 add_test(NAME test_cases COMMAND test_cases)

tests/t00028/.clang-uml

@@ -0,0 +1,12 @@
+compilation_database_dir: ..
+output_directory: puml
+diagrams:
+  t00028_class:
+    type: class
+    glob:
+      - ../../tests/t00028/t00028.cc
+    using_namespace:
+      - clanguml::t00028
+    include:
+      namespaces:
+        - clanguml::t00028

tests/t00028/t00028.cc

@@ -0,0 +1,56 @@
+#include <memory>
+#include <vector>
+
+namespace clanguml {
+namespace t00028 {
+
+/// \uml{note[top] A class note.}
+class A {
+};
+
+/// \uml{note[] B class note.}
+class B {
+};
+
+///
+/// @uml{note:t00028_class[bottom] C class note.}
+/// This is class C.
+class C {
+};
+
+/// \uml{note
+/// D
+/// class
+/// note.}
+class D {
+};
+
+/// \uml{note E template class note.}
+template <typename T> class E {
+    T param;
+};
+
+/// \uml{note:other_diagram[left] G class note.}
+class G {
+};
+
+/// @uml{note[ bottom ] F enum note.}
+enum class F { one, two, three };
+
+/// \uml{note[right] R class note.}
+class R {
+    A aaa;
+
+    B *bbb;
+
+    C &ccc;
+
+    std::vector<std::shared_ptr<D>> ddd;
+
+    E<int> eee;
+
+    G **ggg;
+};
+
+} // namespace t00028
+} // namespace clanguml

tests/t00028/test_case.h

@@ -0,0 +1,67 @@
+/**
+ * tests/t00028/test_case.cc
+ *
+ * Copyright (c) 2021 Bartek Kryza <bkryza@gmail.com>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+TEST_CASE("t00028", "[test-case][class]")
+{
+    auto [config, db] = load_config("t00028");
+
+    auto diagram = config.diagrams["t00028_class"];
+
+    REQUIRE(diagram->name == "t00028_class");
+
+    REQUIRE(diagram->include.namespaces.size() == 1);
+    REQUIRE_THAT(diagram->include.namespaces,
+        VectorContains(std::string{"clanguml::t00028"}));
+
+    REQUIRE(diagram->exclude.namespaces.size() == 0);
+
+    REQUIRE(diagram->should_include("clanguml::t00028::A"));
+
+    auto model = generate_class_diagram(db, diagram);
+
+    REQUIRE(model.name == "t00028_class");
+
+    auto puml = generate_class_puml(diagram, model);
+    AliasMatcher _A(puml);
+
+    REQUIRE_THAT(puml, StartsWith("@startuml"));
+    REQUIRE_THAT(puml, EndsWith("@enduml\n"));
+
+    REQUIRE_THAT(puml, IsClass(_A("A")));
+    REQUIRE_THAT(puml, IsClass(_A("B")));
+    REQUIRE_THAT(puml, IsClass(_A("C")));
+    REQUIRE_THAT(puml, IsClass(_A("D")));
+    REQUIRE_THAT(puml, IsClassTemplate("E", "T"));
+    REQUIRE_THAT(puml, IsEnum(_A("F")));
+    REQUIRE_THAT(puml, IsClass(_A("R")));
+    REQUIRE_THAT(puml, HasNote(_A("A"), "top", "A class note."));
+    REQUIRE_THAT(puml, HasNote(_A("B"), "left", "B class note."));
+    REQUIRE_THAT(puml, HasNote(_A("C"), "bottom", "C class note."));
+    const auto d_note = R"(
+D
+class
+note.)";
+    REQUIRE_THAT(puml, HasNote(_A("D"), "left", d_note));
+    REQUIRE_THAT(puml, HasNote(_A("E<T>"), "left", "E template class note."));
+    REQUIRE_THAT(puml, HasNote(_A("F"), "bottom", "F enum note."));
+    REQUIRE_THAT(puml, !HasNote(_A("G"), "left", "G class note."));
+    REQUIRE_THAT(puml, HasNote(_A("R"), "right", "R class note."));
+
+    save_puml(
+        "./" + config.output_directory + "/" + diagram->name + ".puml", puml);
+}

tests/t00029/.clang-uml

@@ -0,0 +1,12 @@
+compilation_database_dir: ..
+output_directory: puml
+diagrams:
+  t00029_class:
+    type: class
+    glob:
+      - ../../tests/t00029/t00029.cc
+    using_namespace:
+      - clanguml::t00029
+    include:
+      namespaces:
+        - clanguml::t00029

tests/t00029/t00029.cc

@@ -0,0 +1,53 @@
+#include <memory>
+#include <vector>
+
+namespace clanguml {
+namespace t00029 {
+
+class A {
+};
+
+/// \uml{skip}
+class B {
+};
+
+template <typename T> class C {
+    T param;
+};
+
+/// @uml{skip:t00029_class}
+template <typename T> class D {
+    T param;
+};
+
+enum class E { one, two, three };
+
+/// \uml{skip}
+enum class F { red, green, blue };
+
+class G1 {
+};
+
+class G2 {
+};
+
+class G3 {
+};
+
+class G4 {
+};
+
+struct R {
+    G1 g1;
+
+    /// \uml{skip}
+    G2 g2;
+
+    /// \uml{skiprelationship}
+    G3 &g3;
+
+    std::shared_ptr<G4> g4;
+};
+
+} // namespace t00029
+} // namespace clanguml

tests/t00029/test_case.h

@@ -0,0 +1,65 @@
+/**
+ * tests/t00029/test_case.cc
+ *
+ * Copyright (c) 2021 Bartek Kryza <bkryza@gmail.com>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+TEST_CASE("t00029", "[test-case][class]")
+{
+    auto [config, db] = load_config("t00029");
+
+    auto diagram = config.diagrams["t00029_class"];
+
+    REQUIRE(diagram->name == "t00029_class");
+
+    REQUIRE(diagram->include.namespaces.size() == 1);
+    REQUIRE_THAT(diagram->include.namespaces,
+        VectorContains(std::string{"clanguml::t00029"}));
+
+    REQUIRE(diagram->exclude.namespaces.size() == 0);
+
+    REQUIRE(diagram->should_include("clanguml::t00029::A"));
+
+    auto model = generate_class_diagram(db, diagram);
+
+    REQUIRE(model.name == "t00029_class");
+
+    auto puml = generate_class_puml(diagram, model);
+    AliasMatcher _A(puml);
+
+    REQUIRE_THAT(puml, StartsWith("@startuml"));
+    REQUIRE_THAT(puml, EndsWith("@enduml\n"));
+
+    REQUIRE_THAT(puml, IsClass(_A("A")));
+    REQUIRE_THAT(puml, !IsClass(_A("B")));
+    REQUIRE_THAT(puml, IsClassTemplate("C", "T"));
+    REQUIRE_THAT(puml, !IsClassTemplate("D", "T"));
+    REQUIRE_THAT(puml, IsEnum(_A("E")));
+    REQUIRE_THAT(puml, !IsEnum(_A("F")));
+    REQUIRE_THAT(puml, IsClass(_A("G1")));
+    REQUIRE_THAT(puml, IsClass(_A("G2")));
+    REQUIRE_THAT(puml, IsClass(_A("G3")));
+    REQUIRE_THAT(puml, IsClass(_A("G4")));
+
+    REQUIRE_THAT(puml, IsClass(_A("R")));
+
+    REQUIRE_THAT(puml, IsAggregation(_A("R"), _A("G1"), "+g1"));
+    REQUIRE_THAT(puml, !IsAggregation(_A("R"), _A("G2"), "+g2"));
+    REQUIRE_THAT(puml, !IsAggregation(_A("R"), _A("G3"), "+g3"));
+    REQUIRE_THAT(puml, IsAssociation(_A("R"), _A("G4"), "+g4"));
+
+    save_puml(
+        "./" + config.output_directory + "/" + diagram->name + ".puml", puml);
+}

tests/t00030/.clang-uml

@@ -0,0 +1,12 @@
+compilation_database_dir: ..
+output_directory: puml
+diagrams:
+  t00030_class:
+    type: class
+    glob:
+      - ../../tests/t00030/t00030.cc
+    using_namespace:
+      - clanguml::t00030
+    include:
+      namespaces:
+        - clanguml::t00030

tests/t00030/t00030.cc

@@ -0,0 +1,34 @@
+#include <memory>
+#include <vector>
+
+namespace clanguml {
+namespace t00030 {
+
+class A {
+};
+
+class B {
+};
+
+class C {
+};
+
+class D {
+};
+
+struct R {
+    /// @uml{association[]}
+    A aaa;
+
+    /// @uml{composition[0..1:1..*]}
+    std::vector<B> bbb;
+
+    /// @uml{aggregation[0..1:1..5]}
+    std::vector<C> ccc;
+
+    /// @uml{association[:1]}
+    D ddd;
+};
+
+} // namespace t00030
+} // namespace clanguml

tests/t00030/test_case.h

@@ -0,0 +1,57 @@
+/**
+ * tests/t00030/test_case.cc
+ *
+ * Copyright (c) 2021 Bartek Kryza <bkryza@gmail.com>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+TEST_CASE("t00030", "[test-case][class]")
+{
+    auto [config, db] = load_config("t00030");
+
+    auto diagram = config.diagrams["t00030_class"];
+
+    REQUIRE(diagram->name == "t00030_class");
+
+    REQUIRE(diagram->include.namespaces.size() == 1);
+    REQUIRE_THAT(diagram->include.namespaces,
+        VectorContains(std::string{"clanguml::t00030"}));
+
+    REQUIRE(diagram->exclude.namespaces.size() == 0);
+
+    REQUIRE(diagram->should_include("clanguml::t00030::A"));
+
+    auto model = generate_class_diagram(db, diagram);
+
+    REQUIRE(model.name == "t00030_class");
+
+    auto puml = generate_class_puml(diagram, model);
+    AliasMatcher _A(puml);
+
+    REQUIRE_THAT(puml, StartsWith("@startuml"));
+    REQUIRE_THAT(puml, EndsWith("@enduml\n"));
+
+    REQUIRE_THAT(puml, IsClass(_A("A")));
+    REQUIRE_THAT(puml, IsClass(_A("B")));
+    REQUIRE_THAT(puml, IsClass(_A("C")));
+    REQUIRE_THAT(puml, IsClass(_A("D")));
+
+    REQUIRE_THAT(puml, IsAssociation(_A("R"), _A("A"), "+aaa"));
+    REQUIRE_THAT(puml, IsComposition(_A("R"), _A("B"), "+bbb", "0..1", "1..*"));
+    REQUIRE_THAT(puml, IsAggregation(_A("R"), _A("C"), "+ccc", "0..1", "1..5"));
+    REQUIRE_THAT(puml, IsAssociation(_A("R"), _A("D"), "+ddd", "", "1"));
+
+    save_puml(
+        "./" + config.output_directory + "/" + diagram->name + ".puml", puml);
+}

tests/t00031/.clang-uml

@@ -0,0 +1,12 @@
+compilation_database_dir: ..
+output_directory: puml
+diagrams:
+  t00031_class:
+    type: class
+    glob:
+      - ../../tests/t00031/t00031.cc
+    using_namespace:
+      - clanguml::t00031
+    include:
+      namespaces:
+        - clanguml::t00031

tests/t00031/t00031.cc

@@ -0,0 +1,38 @@
+#include <memory>
+#include <vector>
+
+namespace clanguml {
+namespace t00031 {
+
+/// @uml{style[#back:lightgreen|yellow;header:blue/red]}
+class A {
+};
+
+/// @uml{style[#line.dotted:blue]}
+enum B { one, two, three };
+
+/// @uml{style[#pink;line:red;line.bold;text:red]}
+template <typename T> class C {
+    T ttt;
+};
+
+class D {
+};
+
+struct R {
+    /// @uml{style[#red,dashed,thickness=2]}
+    A *aaa;
+
+    /// @uml{composition}
+    /// @uml{style[#green,dashed,thickness=4]}
+    std::vector<B> bbb;
+
+    /// @uml{style[#blue,dotted,thickness=8]}
+    C<int> ccc;
+
+    /// @uml{style[#blue,plain,thickness=16]}
+    D *ddd;
+};
+
+} // namespace t00031
+} // namespace clanguml

tests/t00031/test_case.h

@@ -0,0 +1,65 @@
+/**
+ * tests/t00031/test_case.cc
+ *
+ * Copyright (c) 2021 Bartek Kryza <bkryza@gmail.com>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+TEST_CASE("t00031", "[test-case][class]")
+{
+    auto [config, db] = load_config("t00031");
+
+    auto diagram = config.diagrams["t00031_class"];
+
+    REQUIRE(diagram->name == "t00031_class");
+
+    REQUIRE(diagram->include.namespaces.size() == 1);
+    REQUIRE_THAT(diagram->include.namespaces,
+        VectorContains(std::string{"clanguml::t00031"}));
+
+    REQUIRE(diagram->exclude.namespaces.size() == 0);
+
+    REQUIRE(diagram->should_include("clanguml::t00031::A"));
+
+    auto model = generate_class_diagram(db, diagram);
+
+    REQUIRE(model.name == "t00031_class");
+
+    auto puml = generate_class_puml(diagram, model);
+    AliasMatcher _A(puml);
+
+    REQUIRE_THAT(puml, StartsWith("@startuml"));
+    REQUIRE_THAT(puml, EndsWith("@enduml\n"));
+
+    REQUIRE_THAT(puml, IsClass(_A("A")));
+    REQUIRE_THAT(puml, IsEnum(_A("B")));
+    REQUIRE_THAT(puml, IsClassTemplate("C", "T"));
+    REQUIRE_THAT(puml, IsClass(_A("D")));
+
+    REQUIRE_THAT(puml,
+        IsAssociationWithStyle(
+            _A("R"), _A("A"), "+aaa", "#red,dashed,thickness=2"));
+    REQUIRE_THAT(puml,
+        IsCompositionWithStyle(
+            _A("R"), _A("B"), "+bbb", "#green,dashed,thickness=4"));
+    REQUIRE_THAT(puml,
+        IsAggregationWithStyle(
+            _A("R"), _A("C<int>"), "+ccc", "#blue,dotted,thickness=8"));
+    REQUIRE_THAT(puml,
+        IsAssociationWithStyle(
+            _A("R"), _A("D"), "+ddd", "#blue,plain,thickness=16"));
+
+    save_puml(
+        "./" + config.output_directory + "/" + diagram->name + ".puml", puml);
+}

tests/test_cases.cc

@@ -131,6 +131,10 @@ using namespace clanguml::test::matchers;
 #include "t00025/test_case.h"
 #include "t00026/test_case.h"
 #include "t00027/test_case.h"
+#include "t00028/test_case.h"
+#include "t00029/test_case.h"
+#include "t00030/test_case.h"
+#include "t00031/test_case.h"
 
 //
 // Sequence diagram tests

tests/test_cases.h

@@ -170,8 +170,7 @@ struct AliasMatcher {
             }
         }
 
-        throw std::runtime_error(fmt::format(
-            "Cannot find alias {} in {}", name, fmt::join(puml, "\n")));
+        return "__INVALID__ALIAS__";
     }
 
     const std::vector<std::string> puml;
@@ -218,11 +217,23 @@ ContainsMatcher IsInnerClass(std::string const &parent,
 }
 
 ContainsMatcher IsAssociation(std::string const &from, std::string const &to,
-    std::string const &label,
+    std::string const &label, std::string multiplicity_source = "",
+    std::string multiplicity_dest = "",
     CaseSensitive::Choice caseSensitivity = CaseSensitive::Yes)
 {
+    std::string format_string = "{}";
+    if (!multiplicity_source.empty())
+        format_string += " \"" + multiplicity_source + "\"";
+
+    format_string += " -->";
+
+    if (!multiplicity_dest.empty())
+        format_string += " \"" + multiplicity_dest + "\"";
+
+    format_string += " {} : {}";
+
     return ContainsMatcher(CasedString(
-        fmt::format("{} --> {} : {}", from, to, label), caseSensitivity));
+        fmt::format(format_string, from, to, label), caseSensitivity));
 }
 
 ContainsMatcher IsFriend(std::string const &from, std::string const &to,
@@ -233,19 +244,70 @@ ContainsMatcher IsFriend(std::string const &from, std::string const &to,
 }
 
 ContainsMatcher IsComposition(std::string const &from, std::string const &to,
-    std::string const &label,
+    std::string const &label, std::string multiplicity_source = "",
+    std::string multiplicity_dest = "",
     CaseSensitive::Choice caseSensitivity = CaseSensitive::Yes)
 {
+    std::string format_string = "{}";
+    if (!multiplicity_source.empty())
+        format_string += " \"" + multiplicity_source + "\"";
+
+    format_string += " *--";
+
+    if (!multiplicity_dest.empty())
+        format_string += " \"" + multiplicity_dest + "\"";
+
+    format_string += " {} : {}";
+
     return ContainsMatcher(CasedString(
-        fmt::format("{} *-- {} : {}", from, to, label), caseSensitivity));
+        fmt::format(format_string, from, to, label), caseSensitivity));
 }
 
 ContainsMatcher IsAggregation(std::string const &from, std::string const &to,
-    std::string const &label,
+    std::string const &label, std::string multiplicity_source = "",
+    std::string multiplicity_dest = "",
     CaseSensitive::Choice caseSensitivity = CaseSensitive::Yes)
 {
+    std::string format_string = "{}";
+    if (!multiplicity_source.empty())
+        format_string += " \"" + multiplicity_source + "\"";
+
+    format_string += " o--";
+
+    if (!multiplicity_dest.empty())
+        format_string += " \"" + multiplicity_dest + "\"";
+
+    format_string += " {} : {}";
+
     return ContainsMatcher(CasedString(
-        fmt::format("{} o-- {} : {}", from, to, label), caseSensitivity));
+        fmt::format(format_string, from, to, label), caseSensitivity));
+}
+
+ContainsMatcher IsAggregationWithStyle(std::string const &from,
+    std::string const &to, std::string const &label, std::string style,
+    CaseSensitive::Choice caseSensitivity = CaseSensitive::Yes)
+{
+    return ContainsMatcher(
+        CasedString(fmt::format("{} o-[{}]- {} : {}", from, style, to, label),
+            caseSensitivity));
+}
+
+ContainsMatcher IsAssociationWithStyle(std::string const &from,
+    std::string const &to, std::string const &label, std::string style,
+    CaseSensitive::Choice caseSensitivity = CaseSensitive::Yes)
+{
+    return ContainsMatcher(
+        CasedString(fmt::format("{} -[{}]-> {} : {}", from, style, to, label),
+            caseSensitivity));
+}
+
+ContainsMatcher IsCompositionWithStyle(std::string const &from,
+    std::string const &to, std::string const &label, std::string style,
+    CaseSensitive::Choice caseSensitivity = CaseSensitive::Yes)
+{
+    return ContainsMatcher(
+        CasedString(fmt::format("{} *-[{}]- {} : {}", from, style, to, label),
+            caseSensitivity));
 }
 
 ContainsMatcher IsInstantiation(std::string const &from, std::string const &to,
@@ -262,6 +324,14 @@ ContainsMatcher IsDependency(std::string const &from, std::string const &to,
         CasedString(fmt::format("{} ..> {}", from, to), caseSensitivity));
 }
 
+ContainsMatcher HasNote(std::string const &cls, std::string const &position,
+    std::string const &note,
+    CaseSensitive::Choice caseSensitivity = CaseSensitive::Yes)
+{
+    return ContainsMatcher(CasedString(
+        fmt::format("note {} of {}", position, cls), caseSensitivity));
+}
+
 template <typename... Ts>
 ContainsMatcher IsMethod(std::string const &name,
     std::string const &type = "void",

tests/test_cases.yaml

@@ -78,6 +78,18 @@ test_cases:
     - name: t00027
       title: Template decorator pattern
       description:
+    - name: t00028
+      title: PlantUML note decorator test case
+      description:
+    - name: t00029
+      title: PlantUML skip decorator test case
+      description:
+    - name: t00030
+      title: PlantUML relationship decorators test case
+      description:
+    - name: t00031
+      title: PlantUML style decorator test case
+      description:
   Sequence diagrams:
     - name: t20001
       title: Basic sequence diagram

tests/test_decorator_parser.cc

@@ -0,0 +1,235 @@
+/**
+ * tests/test_decorator_parser.cc
+ *
+ * Copyright (c) 2021 Bartek Kryza <bkryza@gmail.com>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#define CATCH_CONFIG_MAIN
+
+#include "uml/decorators.h"
+
+#include "catch.h"
+
+TEST_CASE("Test decorator parser on regular comment", "[unit-test]")
+{
+    std::string comment = R"(
+    \brief This is a comment.
+
+    This is a longer comment.
+
+    \param a int an int
+    \param b float a float
+
+    )";
+
+    using namespace clanguml::decorators;
+
+    auto decorators = parse(comment);
+
+    CHECK(decorators.empty());
+}
+
+TEST_CASE("Test decorator parser on note", "[unit-test]")
+{
+    std::string comment = R"(
+    \brief This is a comment.
+
+    This is a longer comment.
+
+    \
+
+    \param a int an int
+    \param b float a float
+
+    \uml{note[left] This is a comment}
+    @uml{note[ top  ]
+
+            This is a comment    }
+    \uml{note This is a comment}
+    \uml{note[] This is a comment}
+    )";
+
+    using namespace clanguml::decorators;
+
+    auto decorators = parse(comment);
+
+    CHECK(decorators.size() == 4);
+
+    auto n1 = std::dynamic_pointer_cast<note>(decorators.at(0));
+    auto n2 = std::dynamic_pointer_cast<note>(decorators.at(1));
+    auto n3 = std::dynamic_pointer_cast<note>(decorators.at(2));
+    auto n4 = std::dynamic_pointer_cast<note>(decorators.at(3));
+
+    CHECK(n1);
+    CHECK(n1->position == "left");
+    CHECK(n1->text == "This is a comment");
+
+    CHECK(n2);
+    CHECK(n2->position == "top");
+    CHECK(n2->text == "This is a comment");
+
+    CHECK(n3);
+    CHECK(n3->position == "left");
+    CHECK(n3->text == "This is a comment");
+
+    CHECK(n4);
+    CHECK(n4->position == "left");
+    CHECK(n4->text == "This is a comment");
+}
+
+TEST_CASE("Test decorator parser on note with custom tag", "[unit-test]")
+{
+    std::string comment = R"(
+    \brief This is a comment.
+
+    This is a longer comment.
+
+    \
+
+    \param a int an int
+    \param b float a float
+
+    \clanguml{note[left] This is a comment}
+    @clanguml{note[ top  ]
+
+            This is a comment    }
+    \clanguml{note This is a comment}
+    \clanguml{note[] This is a comment}
+    )";
+
+    using namespace clanguml::decorators;
+
+    auto decorators = parse(comment, "clanguml");
+
+    CHECK(decorators.size() == 4);
+
+    auto n1 = std::dynamic_pointer_cast<note>(decorators.at(0));
+    auto n2 = std::dynamic_pointer_cast<note>(decorators.at(1));
+    auto n3 = std::dynamic_pointer_cast<note>(decorators.at(2));
+    auto n4 = std::dynamic_pointer_cast<note>(decorators.at(3));
+
+    CHECK(n1);
+    CHECK(n1->position == "left");
+    CHECK(n1->text == "This is a comment");
+
+    CHECK(n2);
+    CHECK(n2->position == "top");
+    CHECK(n2->text == "This is a comment");
+
+    CHECK(n3);
+    CHECK(n3->position == "left");
+    CHECK(n3->text == "This is a comment");
+
+    CHECK(n4);
+    CHECK(n4->position == "left");
+    CHECK(n4->text == "This is a comment");
+}
+
+TEST_CASE("Test decorator parser on style", "[unit-test]")
+{
+    std::string comment = R"(
+    \uml{style[#green,dashed,thickness=4]}
+    )";
+
+    using namespace clanguml::decorators;
+
+    auto decorators = parse(comment);
+
+    CHECK(decorators.size() == 1);
+
+    auto n1 = std::dynamic_pointer_cast<style>(decorators.at(0));
+
+    CHECK(n1);
+    CHECK(n1->spec == "#green,dashed,thickness=4");
+}
+
+TEST_CASE("Test decorator parser on aggregation", "[unit-test]")
+{
+    std::string comment = R"(
+    \uml{aggregation[0..1:0..*]}
+    )";
+
+    using namespace clanguml::decorators;
+
+    auto decorators = parse(comment);
+
+    CHECK(decorators.size() == 1);
+
+    auto n1 = std::dynamic_pointer_cast<aggregation>(decorators.at(0));
+
+    CHECK(n1);
+    CHECK(n1->multiplicity == "0..1:0..*");
+}
+
+TEST_CASE("Test decorator parser on skip", "[unit-test]")
+{
+    std::string comment = R"(
+    \uml{skip}
+    )";
+
+    using namespace clanguml::decorators;
+
+    auto decorators = parse(comment);
+
+    CHECK(decorators.size() == 1);
+
+    auto n1 = std::dynamic_pointer_cast<skip>(decorators.at(0));
+
+    CHECK(n1);
+}
+
+TEST_CASE("Test decorator parser on skiprelationship", "[unit-test]")
+{
+    std::string comment = R"(
+    \uml{skiprelationship}
+    )";
+
+    using namespace clanguml::decorators;
+
+    auto decorators = parse(comment);
+
+    CHECK(decorators.size() == 1);
+
+    auto n1 = std::dynamic_pointer_cast<skip_relationship>(decorators.at(0));
+
+    CHECK(n1);
+}
+
+TEST_CASE("Test decorator parser on diagram scope", "[unit-test]")
+{
+    std::string comment = R"(
+    \uml{note:diagram1,  diagram2,
+    diagram3[left] Note only for diagrams 1, 2 and 3.}
+    )";
+
+    using namespace clanguml::decorators;
+
+    auto decorators = parse(comment);
+
+    CHECK(decorators.size() == 1);
+
+    auto n1 = std::dynamic_pointer_cast<note>(decorators.at(0));
+
+    CHECK(n1);
+    CHECK(n1->diagrams.size() == 3);
+    CHECK(n1->diagrams[0] == "diagram1");
+    CHECK(n1->diagrams[1] == "diagram2");
+    CHECK(n1->diagrams[2] == "diagram3");
+
+    CHECK(n1->position == "left");
+    CHECK(n1->text == "Note only for diagrams 1, 2 and 3.");
+
+    CHECK(n1->applies_to_diagram("diagram2"));
+    CHECK(!n1->applies_to_diagram("diagram4"));
+}

tests/test_util.cc

@@ -46,3 +46,25 @@ TEST_CASE("Test ns_relative", "[unit-test]")
         "static const vector<a>&");
     CHECK(ns_relative({"clanguml::t0"}, "clanguml::t0") == "t0");
 }
+
+TEST_CASE("Test replace_all", "[unit-test]")
+{
+    using namespace clanguml::util;
+
+    const std::string orig = R"(
+                        Lorem ipsum \clanguml{note} something something...
+
+                        \clanguml{style}
+
+                        )";
+    std::string text{orig};
+
+    CHECK(replace_all(text, "NOTHERE", "HERE") == false);
+    CHECK(replace_all(text, "\\clanguml", "@clanguml") == true);
+    CHECK(replace_all(text, "something", "nothing") == true);
+    CHECK(replace_all(text, "something", "nothing") == false);
+    CHECK(replace_all(text, "nothing", "something") == true);
+    CHECK(replace_all(text, "@clanguml", "\\clanguml") == true);
+
+    CHECK(text == orig);
+}

util/generate_test_cases_docs.py

@@ -46,7 +46,7 @@ with open(r'tests/test_cases.yaml') as f:
                     tc.write("{}\n".format(test_case['description']))
 
                 # Write test config file
-                config = open('tests/{0}/.clanguml'.format(name), 'r').read()
+                config = open('tests/{0}/.clang-uml'.format(name), 'r').read()
                 tc.write("## Config\n")
                 tc.write("```yaml\n")
                 tc.write(config)