Added support for call comment directive to inject calls in comments (Fixes #196)

src/decorators/decorators.cc

@@ -47,6 +47,9 @@ std::shared_ptr<decorator> decorator::from_string(std::string_view c)
     if (c.find(association::label) == 0) {
         return association::from_string(c);
     }
+    if (c.find(call::label) == 0) {
+        return call::from_string(c);
+    }
 
     return {};
 }
@@ -173,6 +176,17 @@ std::shared_ptr<decorator> association::from_string(std::string_view c)
     return res;
 }
 
+std::shared_ptr<decorator> call::from_string(std::string_view c)
+{
+    auto res = std::make_shared<call>();
+    auto toks = res->tokenize(call::label, c);
+
+    res->diagrams = toks.diagrams;
+    res->callee = util::trim(toks.text);
+
+    return res;
+}
+
 std::vector<std::shared_ptr<decorator>> parse(
     std::string documentation_block, const std::string &clanguml_tag)
 {

src/decorators/decorators.h

@@ -140,6 +140,17 @@ struct association : public relationship {
     static std::shared_ptr<decorator> from_string(std::string_view c);
 };
 
+/**
+ * @brief Represents a call message in sequence diagram
+ */
+struct call : public decorator {
+    static inline const std::string label{"call"};
+
+    std::string callee;
+
+    static std::shared_ptr<decorator> from_string(std::string_view c);
+};
+
 /**
  * @brief Parse a documentation block and extract all clang-uml decorators
  *