Hi,
I have 2 problems with STL and compiled/interpreted code.
I tried several different ways, playing with dictionary and LinkDef, but
at the end I can get the same behaviour with the following very simplified
examples which reimplements a sort on a vector<int>.
<file myless.C>
class myless
{
public:
bool operator()( const int &a, const int &b) {
return a < b;
}
};
</file>
<file test.C>
#include "myless.C"
#include <algorithm>
#include <vector>
#include <iostream>
void test()
{
vector<int> v;
v.push_back(1);
v.push_back(3);
v.push_back(2);
// sort(v.begin(),v.end());
sort(v.begin(),v.end(),myless());
cout << v[0] << " " << v[1] << " " << v[2] <<endl;
}
</file>
with this example,
> .L test.C++
> test()
work perfectly, while
> .L test.C
> test()
gives:
Error: Constructor myless((myless)(141656792)) not found FILE:algo.h
LINE:864
*** Interpreter error recovered ***
I guess this is due to the fact that STL sort is expecting a pointer to
the operator (or whatever it is) and this cannot be understood by
CINT, so the only way is to compile it?
Now imagine I want to have a compiled function that does the sort for me.
<file mysort.C>
#include <algorithm>
#include <vector>
#include <iostream>
class mysort
{
public:
static void doSort(vector<int> &vpar)
{
sort(vpar.begin(),vpar.end());
}
};
</file>
this is what I get in a sample session:
root [0] #include <vector>
root [1] vector<int> v
root [2] v.size()
(const unsigned int)0
root [3] .L mysort.C++
Info in <ACLiC>: creating shared library ./mysort_C.so
Class mysort: Streamer() not declared
Class mysort: ShowMembers() not declared
root [4] v.size()
(const unsigned int)0
root [5] vector<int> v2
root [6] v2.size()
Error: Can't call vector<int,__malloc_alloc_template<0> >::size() in
current scope FILE:/tmp/filek1D2K9_cint LINE:1
Possible candidates are...
filename line:size busy function type and name (in
vector<int,__malloc_alloc_template<0> >)
Error: Symbol v2 is not defined in current scope
FILE:/tmp/filek1D2K9_cint LINE:1
Error: Failed to evaluate v2.size()Possible candidates are...
filename line:size busy function type and name
*** Interpreter error recovered ***
i.e. after loading a file that actually instantites a vector<int>,
it is not possible to use it interactively. I guess that this is
due to the fact that the compiler creates a concrete type out of the
template and this overrides the CINT template.
How can I use a vector both in compiled and interpreted codes?
I could not find useful information in roottalk. I am using version
3.03.02.
Thanks,
Nicola
-----------------------------------
Nicola Amapane []=-
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CERN +41-22-7671519 _/|] ) ___ \
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mailto:nicola.amapane@cern.ch @ @
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