Added support for ternary conditional operator in sequence diagrams

src/common/model/enums.cc

@@ -106,6 +106,10 @@ std::string to_string(message_t r)
         return "case";
     case message_t::kSwitchEnd:
         return "end switch";
+    case message_t::kConditional:
+        return "conditional";
+    case message_t::kConditionalEnd:
+        return "end conditional";
     default:
         assert(false);
         return "";

src/common/model/enums.h

@@ -59,6 +59,8 @@ enum class message_t {
     kSwitch,
     kCase,
     kSwitchEnd,
+    kConditional,
+    kConditionalEnd,
     kNone
 };
 

src/sequence_diagram/generators/plantuml/sequence_diagram_generator.cc

@@ -208,6 +208,15 @@ void generator::generate_activity(const activity &a, std::ostream &ostr,
         else if (m.type() == message_t::kSwitchEnd) {
             ostr << "end\n";
         }
+        else if (m.type() == message_t::kConditional) {
+            ostr << "alt\n";
+        }
+        else if (m.type() == message_t::kElse) {
+            ostr << "else\n";
+        }
+        else if (m.type() == message_t::kConditionalEnd) {
+            ostr << "end\n";
+        }
     }
 }
 

src/sequence_diagram/model/diagram.cc

@@ -348,6 +348,52 @@ void diagram::add_default_stmt(
     }
 }
 
+void diagram::add_conditional_stmt(
+    const common::model::diagram_element::id_t current_caller_id)
+{
+    using clanguml::common::model::message_t;
+
+    if (sequences_.find(current_caller_id) == sequences_.end()) {
+        activity a{current_caller_id};
+        sequences_.insert({current_caller_id, std::move(a)});
+    }
+
+    get_activity(current_caller_id)
+        .add_message({message_t::kConditional, current_caller_id});
+}
+
+void diagram::add_conditional_elsestmt(
+    const common::model::diagram_element::id_t current_caller_id)
+{
+    using clanguml::common::model::message_t;
+
+    get_activity(current_caller_id)
+        .add_message({message_t::kElse, current_caller_id});
+}
+
+void diagram::end_conditional_stmt(
+    const common::model::diagram_element::id_t current_caller_id)
+{
+    using clanguml::common::model::message_t;
+
+    message m{message_t::kConditionalEnd, current_caller_id};
+
+    if (sequences_.find(current_caller_id) != sequences_.end()) {
+        auto &current_messages = get_activity(current_caller_id).messages();
+
+        if (current_messages.at(current_messages.size() - 1).type() ==
+                message_t::kElse &&
+            current_messages.at(current_messages.size() - 2).type() ==
+                message_t::kConditional) {
+            current_messages.pop_back();
+            current_messages.pop_back();
+        }
+        else {
+            current_messages.emplace_back(std::move(m));
+        }
+    }
+}
+
 bool diagram::started() const { return started_; }
 
 void diagram::started(bool s) { started_ = s; }

src/sequence_diagram/model/diagram.h

@@ -112,6 +112,13 @@ public:
     void add_default_stmt(
         common::model::diagram_element::id_t current_caller_id);
 
+    void add_conditional_stmt(
+        common::model::diagram_element::id_t current_caller_id);
+    void add_conditional_elsestmt(
+        common::model::diagram_element::id_t current_caller_id);
+    void end_conditional_stmt(
+        common::model::diagram_element::id_t current_caller_id);
+
     bool started() const;
     void started(bool s);
 

src/sequence_diagram/visitor/call_expression_context.cc

@@ -283,6 +283,27 @@ void call_expression_context::leave_switchstmt()
         switch_stmt_stack_.pop();
 }
 
+clang::ConditionalOperator *
+call_expression_context::current_conditionaloperator() const
+{
+    if (conditional_operator_stack_.empty())
+        return nullptr;
+
+    return conditional_operator_stack_.top();
+}
+
+void call_expression_context::enter_conditionaloperator(
+    clang::ConditionalOperator *stmt)
+{
+    conditional_operator_stack_.push(stmt);
+}
+
+void call_expression_context::leave_conditionaloperator()
+{
+    if (conditional_operator_stack_.empty())
+        conditional_operator_stack_.pop();
+}
+
 bool call_expression_context::is_expr_in_current_control_statement_condition(
     const clang::Stmt *stmt) const
 {
@@ -334,6 +355,13 @@ bool call_expression_context::is_expr_in_current_control_statement_condition(
                 return true;
             }
         }
+
+        if (current_conditionaloperator()) {
+            if (common::is_subexpr_of(
+                    current_conditionaloperator()->getCond(), stmt)) {
+                return true;
+            }
+        }
     }
 
     return false;

src/sequence_diagram/visitor/call_expression_context.h

@@ -88,6 +88,10 @@ struct call_expression_context {
     void enter_switchstmt(clang::SwitchStmt *stmt);
     void leave_switchstmt();
 
+    clang::ConditionalOperator *current_conditionaloperator() const;
+    void enter_conditionaloperator(clang::ConditionalOperator *stmt);
+    void leave_conditionaloperator();
+
     bool is_expr_in_current_control_statement_condition(
         const clang::Stmt *stmt) const;
 
@@ -110,6 +114,7 @@ private:
     std::stack<clang::Stmt *> loop_stmt_stack_;
     std::stack<clang::Stmt *> try_stmt_stack_;
     std::stack<clang::SwitchStmt *> switch_stmt_stack_;
+    std::stack<clang::ConditionalOperator *> conditional_operator_stack_;
 };
 
 }

src/sequence_diagram/visitor/translation_unit_visitor.cc

@@ -807,6 +807,37 @@ bool translation_unit_visitor::TraverseDefaultStmt(clang::DefaultStmt *stmt)
     return true;
 }
 
+bool translation_unit_visitor::TraverseConditionalOperator(
+    clang::ConditionalOperator *stmt)
+{
+    const auto current_caller_id = context().caller_id();
+
+    if (current_caller_id) {
+        context().enter_conditionaloperator(stmt);
+        diagram().add_conditional_stmt(current_caller_id);
+    }
+
+    RecursiveASTVisitor<translation_unit_visitor>::TraverseStmt(
+        stmt->getCond());
+
+    RecursiveASTVisitor<translation_unit_visitor>::TraverseStmt(
+        stmt->getTrueExpr());
+
+    if (current_caller_id) {
+        diagram().add_conditional_elsestmt(current_caller_id);
+    }
+
+    RecursiveASTVisitor<translation_unit_visitor>::TraverseStmt(
+        stmt->getFalseExpr());
+
+    if (current_caller_id) {
+        context().leave_conditionaloperator();
+        diagram().end_conditional_stmt(current_caller_id);
+    }
+
+    return true;
+}
+
 bool translation_unit_visitor::VisitCallExpr(clang::CallExpr *expr)
 {
     using clanguml::common::model::message_scope_t;

src/sequence_diagram/visitor/translation_unit_visitor.h

@@ -86,6 +86,8 @@ public:
 
     bool TraverseDefaultStmt(clang::DefaultStmt *stmt);
 
+    bool TraverseConditionalOperator(clang::ConditionalOperator *stmt);
+
     clanguml::sequence_diagram::model::diagram &diagram();
 
     const clanguml::sequence_diagram::model::diagram &diagram() const;