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investigation: Segfault in GDB (III)

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Fischlurch 2015-08-13 18:45:05 +02:00
parent 28d117820a
commit f041e974c6
1 changed files with 45 additions and 2 deletions
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47
research/try.cpp
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@ -36,7 +36,10 @@
*/
#include "lib/test/test-helper.hpp"
#include "lib/format-util.hpp"
//#include "lib/format-util.hpp"
#include "lib/meta/trait.hpp"
#include "lib/itertools.hpp"
#include "lib/symbol.hpp"
#include <iostream>
#include <string>
@ -48,6 +51,46 @@ using std::cout;
using std::endl;
namespace { // helper to build range iterator on demand
template<class CON, typename TOGGLE = void>
struct _RangeIter
{
using StlIter = typename CON::const_iterator;
lib::RangeIter<StlIter> iter;
_RangeIter(CON const& collection)
: iter(begin(collection), end(collection))
{ }
};
}
template<class CON>
inline string
join (CON&& coll, string const& delim =", ")
{
using Coll = typename lib::meta::Strip<CON>::Type;
using Val = typename Coll::value_type;
std::function<string(Val const&)> toString = [] (Val const& val) { return string(val); };
_RangeIter<Coll> range(std::forward<Coll>(coll));
auto strings = lib::transformIterator(range.iter, toString);
if (!strings) return "";
std::ostringstream buffer;
for (string const& elm : strings)
buffer << elm << delim;
// chop off last delimiter
size_t len = buffer.str().length();
ASSERT (len > delim.length());
return buffer.str().substr(0, len - delim.length());
}
int
@ -62,7 +105,7 @@ main (int, char**)
crew.push_back("Crusher");
crew.push_back("La Forge");
cout << "enterprise = " << util::join(crew)<<endl;
cout << "enterprise = " << join(crew)<<endl;
cout << "\n.gulp.\n";