Added generate_concept_requirements config option (#237)

docs/configuration_file.md

@@ -25,6 +25,7 @@
 * `glob` - list of glob patterns to match source code files for analysis
 * `include_relations_also_as_members` - when set to `false`, class members for relationships are rendered in UML are skipped from class definition (default: `true`)
 * `generate_method_arguments` - determines whether the class diagrams methods contain full arguments (`full`), are abbreviated (`abbreviated`) or skipped (`none`)
+* `generate_concept_requirements` - determines whether concept requirements are rendered in the diagram (default: `true`)
 * `using_namespace` - similar to C++ `using namespace`, a `A::B` value here will render a class `A::B::C::MyClass` in the diagram as `C::MyClass`, at most 1 value is supported
 * `generate_packages` - whether or not the class diagram should contain packages generated from namespaces or subdirectories
 * `package_type` - determines how the packages are inferred: `namespace` - use C++ namespaces, `directory` - use project's directory structure

src/class_diagram/generators/mermaid/class_diagram_generator.cc

@@ -293,8 +293,8 @@ void generator::generate(const concept_ &c, std::ostream &ostr) const
     ostr << " {" << '\n';
     ostr << indent(2) << "<<concept>>\n";
 
-    // TODO: add option to enable/disable this
+    if (config().generate_concept_requirements() &&
-    if (c.requires_parameters().size() + c.requires_statements().size() > 0) {
+        (c.requires_parameters().size() + c.requires_statements().size() > 0)) {
         std::vector<std::string> parameters;
         parameters.reserve(c.requires_parameters().size());
         for (const auto &p : c.requires_parameters()) {

src/class_diagram/generators/plantuml/class_diagram_generator.cc

@@ -383,8 +383,8 @@ void generator::generate(const concept_ &c, std::ostream &ostr) const
 
     ostr << " {" << '\n';
 
-    // TODO: add option to enable/disable this
+    if (config().generate_concept_requirements() &&
-    if (c.requires_parameters().size() + c.requires_statements().size() > 0) {
+        (c.requires_parameters().size() + c.requires_statements().size() > 0)) {
         std::vector<std::string> parameters;
         parameters.reserve(c.requires_parameters().size());
         for (const auto &p : c.requires_parameters()) {

src/config/config.cc

@@ -197,6 +197,8 @@ void inheritable_diagram_options::inherit(
     puml.override(parent.puml);
     mermaid.override(parent.mermaid);
     generate_method_arguments.override(parent.generate_method_arguments);
+    generate_concept_requirements.override(
+        parent.generate_concept_requirements);
     generate_packages.override(parent.generate_packages);
     generate_template_argument_dependencies.override(
         parent.generate_template_argument_dependencies);

src/config/config.h

@@ -530,6 +530,8 @@ struct inheritable_diagram_options {
     option<struct mermaid> mermaid{"mermaid", option_inherit_mode::kAppend};
     option<method_arguments> generate_method_arguments{
         "generate_method_arguments", method_arguments::full};
+    option<bool> generate_concept_requirements{
+        "generate_concept_requirements", true};
     option<bool> group_methods{"group_methods", true};
     option<member_order_t> member_order{
         "member_order", member_order_t::lexical};

src/config/schema.h

@@ -174,6 +174,7 @@ types:
         #
         generate_method_arguments: !optional generate_method_arguments_t
         generate_packages: !optional bool
+        generate_concept_requirements: !optional bool
         package_type: !optional package_type_t
         generate_template_argument_dependencies: !optional bool
         skip_redundant_dependencies: !optional bool
@@ -335,6 +336,7 @@ root:
     include_relations_also_as_members: !optional bool
     generate_method_arguments: !optional generate_method_arguments_t
     combine_free_functions_into_file_participants: !optional bool
+    generate_concept_requirements: !optional bool
     generate_return_types: !optional bool
     generate_condition_statements: !optional bool
     generate_message_comments: !optional bool

src/config/yaml_decoders.cc

@@ -626,6 +626,7 @@ template <> struct convert<class_diagram> {
         get_option(node, rhs.layout);
         get_option(node, rhs.include_relations_also_as_members);
         get_option(node, rhs.generate_method_arguments);
+        get_option(node, rhs.generate_concept_requirements);
         get_option(node, rhs.group_methods);
         get_option(node, rhs.member_order);
         get_option(node, rhs.generate_packages);
@@ -823,6 +824,7 @@ template <> struct convert<config> {
         get_option(node, rhs.puml);
         get_option(node, rhs.mermaid);
         get_option(node, rhs.generate_method_arguments);
+        get_option(node, rhs.generate_concept_requirements);
         get_option(node, rhs.generate_packages);
         get_option(node, rhs.package_type);
         get_option(node, rhs.generate_template_argument_dependencies);

src/config/yaml_emitters.cc

@@ -326,6 +326,7 @@ YAML::Emitter &operator<<(
         cd != nullptr) {
         out << cd->title;
         out << c.generate_method_arguments;
+        out << c.generate_concept_requirements;
         out << c.generate_packages;
         out << c.include_relations_also_as_members;
         if (c.relationship_hints) {

tests/t00074/.clang-uml

@@ -0,0 +1,10 @@
+diagrams:
+  t00074_class:
+    type: class
+    glob:
+      - t00074.cc
+    generate_concept_requirements: false
+    include:
+      namespaces:
+        - clanguml::t00074
+    using_namespace: clanguml::t00074

tests/t00074/t00074.cc

@@ -0,0 +1,16 @@
+namespace clanguml {
+namespace t00074 {
+template <typename T>
+concept fruit_c = requires(T t) {
+                      T{};
+                      t.get_name();
+                  };
+
+template <typename T>
+concept apple_c = fruit_c<T> && requires(T t) { t.get_sweetness(); };
+
+template <typename T>
+concept orange_c = fruit_c<T> && requires(T t) { t.get_bitterness(); };
+
+}
+}

tests/t00074/test_case.h

@@ -0,0 +1,91 @@
+/**
+ * tests/t00074/test_case.h
+ *
+ * Copyright (c) 2021-2024 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("t00074", "[test-case][class]")
+{
+    auto [config, db] = load_config("t00074");
+
+    auto diagram = config.diagrams["t00074_class"];
+
+    REQUIRE(diagram->name == "t00074_class");
+
+    auto model = generate_class_diagram(*db, diagram);
+
+    REQUIRE(model->name() == "t00074_class");
+
+    {
+        auto src = generate_class_puml(diagram, *model);
+        AliasMatcher _A(src);
+
+        REQUIRE_THAT(src, StartsWith("@startuml"));
+        REQUIRE_THAT(src, EndsWith("@enduml\n"));
+
+        REQUIRE_THAT(src, IsConcept(_A("fruit_c<T>")));
+        REQUIRE_THAT(src, IsConcept(_A("apple_c<T>")));
+        REQUIRE_THAT(src, IsConcept(_A("orange_c<T>")));
+
+        REQUIRE_THAT(
+            src, IsConstraint(_A("apple_c<T>"), _A("fruit_c<T>"), "T"));
+        REQUIRE_THAT(
+            src, IsConstraint(_A("orange_c<T>"), _A("fruit_c<T>"), "T"));
+
+        REQUIRE_THAT(
+            src, !IsConceptRequirement(_A("apple_c<T>"), "t.get_sweetness()"));
+        REQUIRE_THAT(src,
+            !IsConceptRequirement(_A("orange_c<T>"), "t.get_bitterness()"));
+
+        save_puml(config.output_directory(), diagram->name + ".puml", src);
+    }
+
+    {
+        auto j = generate_class_json(diagram, *model);
+
+        using namespace json;
+
+        REQUIRE(IsConcept(j, "fruit_c<T>"));
+        REQUIRE(IsConcept(j, "apple_c<T>"));
+        REQUIRE(IsConcept(j, "orange_c<T>"));
+
+        save_json(config.output_directory(), diagram->name + ".json", j);
+    }
+
+    {
+        auto src = generate_class_mermaid(diagram, *model);
+
+        mermaid::AliasMatcher _A(src);
+        using mermaid::IsConcept;
+        using mermaid::IsConceptRequirement;
+        using mermaid::IsConstraint;
+
+        REQUIRE_THAT(src, IsConcept(_A("fruit_c<T>")));
+        REQUIRE_THAT(src, IsConcept(_A("apple_c<T>")));
+        REQUIRE_THAT(src, IsConcept(_A("orange_c<T>")));
+
+        REQUIRE_THAT(
+            src, IsConstraint(_A("apple_c<T>"), _A("fruit_c<T>"), "T"));
+        REQUIRE_THAT(
+            src, IsConstraint(_A("orange_c<T>"), _A("fruit_c<T>"), "T"));
+
+        REQUIRE_THAT(
+            src, !IsConceptRequirement(_A("apple_c<T>"), "t.get_sweetness()"));
+        REQUIRE_THAT(
+            src, !IsConceptRequirement(_A("apple_c<T>"), "t.get_bitterness()"));
+
+        save_mermaid(config.output_directory(), diagram->name + ".mmd", src);
+    }
+}

tests/test_cases.cc

@@ -415,6 +415,9 @@ using namespace clanguml::test::matchers;
 #include "t00072/test_case.h"
 #endif
 #include "t00073/test_case.h"
+#if defined(ENABLE_CXX_STD_20_TEST_CASES)
+#include "t00074/test_case.h"
+#endif
 
 ///
 /// Sequence diagram tests

tests/test_cases.yaml

@@ -216,6 +216,9 @@ test_cases:
     - name: t00073
       title: Class diagram for template overload pattern
       description:
+    - name: t00074
+      title: Test case for rendering concepts without requirements
+      description:
   Sequence diagrams:
     - name: t20001
       title: Basic sequence diagram test case