Stack.cpp

private:
	StackContextEntry* getFromContext(StackElements element) {
		// as we emplace back in the stack, we should find from back to front
		for (auto it = m_stack.rbegin(); it != m_stack.rend(); it++) {
			if ((*it).elementType == element) {
				return &(*it);
			}
		}
		return NULL;
	}

	void addToStack(StackElements element, const ast::Node& value) {
		m_stack.emplace_back(StackContextEntry { element, &value } );
	}

	void popContext() {
		m_stack.pop_back();
	}