data: lambda handling

* implemented handling lambdas as functions
* functions can have child nodes now
* NameElements in NameHierarchy can have signatures now.
* fixed crash that occurred when message listener was used while being half way through its destruction process.

src/lib/data/name/NameElement.cpp

@@ -2,6 +2,13 @@
 
 NameElement::NameElement(const std::string& name)
 	: m_name(name)
+	, m_signature("")
+{
+}
+
+NameElement::NameElement(const std::string& name, const std::string& signature)
+	: m_name(name)
+	, m_signature(signature)
 {
 }
 
@@ -13,3 +20,8 @@ std::string NameElement::getFullName() const
 {
 	return m_name;
 }
+
+std::string NameElement::getFullSignature() const
+{
+	return m_signature;
+}

src/lib/data/name/NameElement.h

@@ -7,12 +7,15 @@ class NameElement
 {
 public:
 	NameElement(const std::string& name);
+	NameElement(const std::string& name, const std::string& signature);
 	~NameElement();
 
 	std::string getFullName() const;
+	std::string getFullSignature() const;
 
 private:
 	std::string m_name;
+	std::string m_signature;
 };
 
 #endif // NAME_ELEMENT_H

src/lib/data/name/NameHierarchy.cpp

@@ -23,7 +23,7 @@ void NameHierarchy::pop()
 	m_elements.pop_back();
 }
 
-std::shared_ptr<NameElement> NameHierarchy::back()
+std::shared_ptr<NameElement> NameHierarchy::back() const
 {
 	return m_elements.back();
 }

src/lib/data/name/NameHierarchy.h

@@ -16,7 +16,7 @@ public:
 
 	void push(std::shared_ptr<NameElement> element);
 	void pop();
-	std::shared_ptr<NameElement> back();
+	std::shared_ptr<NameElement> back() const;
 	std::shared_ptr<NameElement> operator[](size_t pos) const;
 	size_t size() const;