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More repr, fix infinite loop when calling repr on a lanele->regelem->lanelet cycle #383

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More repr, fix infinite loop when calling repr on a lanele->regelem->lanelet cycle #383

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7afad88
Fix infinite loop when running python repr on lanelets
poggenhans Jan 20, 2025
01ac3ef
Add python repr for routing module
poggenhans Jan 20, 2025
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51 changes: 51 additions & 0 deletions lanelet2_python/include/lanelet2_python/internal/repr.h
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Original file line number Diff line number Diff line change
@@ -0,0 +1,51 @@
#pragma once
#include <boost/python.hpp>
#include <sstream>
#include <string>

namespace lanelet {
namespace python {
inline void formatHelper(std::ostream& os) {}

template <typename... Args>
// NOLINTNEXTLINE(readability-identifier-naming)
void formatHelper(std::ostream& os, const std::string& s, const Args&... Args_) {
if (!s.empty()) {
os << ", ";
}
os << s;
formatHelper(os, Args_...);
}

template <typename T, typename... Args>
// NOLINTNEXTLINE(readability-identifier-naming)
void formatHelper(std::ostream& os, const T& next, const Args&... Args_) {
os << ", ";
os << next;
formatHelper(os, Args_...);
}

template <typename T, typename... Args>
// NOLINTNEXTLINE(readability-identifier-naming)
void format(std::ostream& os, const T& first, const Args&... Args_) {
os << first;
formatHelper(os, Args_...);
}

template <typename... Args>
// NOLINTNEXTLINE(readability-identifier-naming)
std::string makeRepr(const char* name, const Args&... Args_) {
std::ostringstream os;
os << name << '(';
format(os, Args_...);
os << ')';
return os.str();
}

inline std::string repr(const boost::python::object& o) {
using namespace boost::python;
object repr = import("builtins").attr("repr");
return call<std::string>(repr.ptr(), o);
}
} // namespace python
} // namespace lanelet
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