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// cpp11 version: 0.3.1.1
// vendored on: 2021-08-11
#pragma once
#include <stddef.h> // for size_t
#include <string> // for string, basic_string
#include "cpp11/R.hpp" // for SEXP, SEXPREC, REAL_ELT, R_NilV...
#include "cpp11/attribute_proxy.hpp" // for attribute_proxy
#include "cpp11/protect.hpp" // for preserved
namespace cpp11 {
/// Converting to SEXP
class sexp {
private:
SEXP data_ = R_NilValue;
SEXP preserve_token_ = R_NilValue;
public:
sexp() = default;
sexp(SEXP data) : data_(data), preserve_token_(preserved.insert(data_)) {
// REprintf("created %x %x : %i\n", data_, preserve_token_, protect_head_size());
}
sexp(const sexp& rhs) {
data_ = rhs.data_;
preserve_token_ = preserved.insert(data_);
// REprintf("copied %x new protect %x : %i\n", rhs.data_, preserve_token_,
// protect_head_size());
}
sexp(sexp&& rhs) {
data_ = rhs.data_;
preserve_token_ = rhs.preserve_token_;
rhs.data_ = R_NilValue;
rhs.preserve_token_ = R_NilValue;
// REprintf("moved %x : %i\n", rhs.data_, protect_head_size());
}
sexp& operator=(const sexp& rhs) {
preserved.release(preserve_token_);
data_ = rhs.data_;
preserve_token_ = preserved.insert(data_);
// REprintf("assigned %x : %i\n", rhs.data_, protect_head_size());
return *this;
}
// void swap(sexp& rhs) {
// sexp tmp(rhs);
// rhs = *this;
//*this = tmp;
//}
~sexp() { preserved.release(preserve_token_); }
attribute_proxy<sexp> attr(const char* name) const {
return attribute_proxy<sexp>(*this, name);
}
attribute_proxy<sexp> attr(const std::string& name) const {
return attribute_proxy<sexp>(*this, name.c_str());
}
attribute_proxy<sexp> attr(SEXP name) const {
return attribute_proxy<sexp>(*this, name);
}
attribute_proxy<sexp> names() const {
return attribute_proxy<sexp>(*this, R_NamesSymbol);
}
operator SEXP() const { return data_; }
operator double() const { return REAL_ELT(data_, 0); }
operator size_t() const { return REAL_ELT(data_, 0); }
operator bool() const { return LOGICAL_ELT(data_, 0); }
SEXP data() const { return data_; }
};
} // namespace cpp11
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