Databases
StackOverflow2013
Postsdbo
POC++ classes overloading: is it possible to make compiler see which one to use based on template?
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POC++ classes overloading: is it possible to make compiler see which one to use based on template?
    primarykey
    data
    text
    <p>I have created N classes that take from one to N ints into constructors (and I hoped that would be enough) but appeared I am wrong. </p> <p>Here are 2 sample classes:</p> <pre><code>template &lt; class T0 , class T1&gt; class my_map { typedef T0 type_0; typedef T1 type_1; std::map&lt;std::string, type_0* &gt; T0_var; std::map&lt;std::string, type_1* &gt; T1_var; friend class apitemp; public: my_map( int meaningless0 = 42 , int meaningless1 = 42 ) {} class apitemp { std::string n_; my_map* p; public: apitemp(std::string name_, my_map* parent) : n_(name_), p(parent) {} operator type_0*() {return p-&gt;T0_var[n_] ; } operator type_1*() {return p-&gt;T1_var[n_] ; } }; void insert(std::string name, type_0* ptr) { T0_var[name] = ptr; } void insert(std::string name, type_1* ptr) { T1_var[name] = ptr; } apitemp operator[](std::string n_) {return apitemp(n_, this);} }; template &lt; class T0&gt; class my_map { typedef T0 type_0; std::map&lt;std::string, type_0* &gt; T0_var; friend class apitemp; public: my_map( int meaningless0 = 42 ) {} class apitemp { std::string n_; my_map* p; public: apitemp(std::string name_, my_map* parent) : n_(name_), p(parent) {} operator type_0*() {return p-&gt;T0_var[n_] ; } }; void insert(std::string name, type_0* ptr) { T0_var[name] = ptr; } apitemp operator[](std::string n_) {return apitemp(n_, this);} }; </code></pre> <p>Order does not matter... when both classes are present I can't compile my code, when one is commented (and we use API from only one of 2 classes) everything compiles... but when I try to use both I get compiler errors... So I wonder how to make such classes overridable? </p>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. USsehe
    1. USmyWallJSON
    plurals
    1. PL
      singulars
      1. LTLinked
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. COBoost mostly does variable number of template arguments with something like: `template <class T1 = no_type, class T2 = no_type, class T3 = no_type, ...>`
      singulars
      1. POC++ classes overloading: is it possible to make compiler see which one to use based on template?
      1. USUncleBens
    2. COI followed your question regarding that topic. You should really get back to square one and figure out what you are actually trying to accomplish. You are way in over your head.
      singulars
      1. POC++ classes overloading: is it possible to make compiler see which one to use based on template?
      1. USpmr
    3. COEven if you did a setup like UncleBens talks about your `insert` method would not compile if 2 of the types were the same. And, I agree with pmr.
      singulars
      1. POC++ classes overloading: is it possible to make compiler see which one to use based on template?
      1. USDavid
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload