Accessing C++ template types to use as further types for templates

Asked Sep 28 '17 at 13:28

Active Sep 28 '17 at 13:33

Viewed 24 times

I have following classes:

template<class PhysicalType, class LogicalType, int offset>
class Cluster
{
public:
    typedef PhysicalType PhyType;
    typedef LogicalType LogType;
};

template<class PhysicalType>
class Axis 
{

};

How can I create a 3rd class that uses the first one as a template class and further use its typedefs as a template to the second class like so (pseudo):

template<Cluster clusterX, Cluster clusterY>
class Curve
{
    Curve(Axis<clusterX::PhyType> xAxis, Axis<clusterY::PhyType> yAxis)
    {}
};

I need a C++98 solution.

Thanks!

edited Sep 28 '17 at 13:33

asked Sep 28 '17 at 13:28

phoebus

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What isn't working exactly? – StoryTeller - Unslander Monica Sep 28 '17 at 13:29
Also, does [reading this](https://stackoverflow.com/questions/610245/where-and-why-do-i-have-to-put-the-template-and-typename-keywords) make a difference by any chance? – StoryTeller - Unslander Monica Sep 28 '17 at 13:30
It says `Cluster is not a type` when trying to compile. I will have a look at it, thank you. – phoebus Sep 28 '17 at 13:33
TL;DR you need `Axis xAxis` – NathanOliver Sep 28 '17 at 13:34
Still says that Cluster and Axis is not a type and that the template argument 1 is invalid if I add the typename keyword @NathanOliver – phoebus Sep 28 '17 at 13:37
Hold on, do you actually want non template types or did you mean to have `template class Curve` – NathanOliver Sep 28 '17 at 13:38

Accessing C++ template types to use as further types for templates

0 Answers0