1 files changed, 138 insertions, 0 deletions
diff --git a/src/arrow/r/inst/include/cpp11/list.hpp b/src/arrow/r/inst/include/cpp11/list.hpp
new file mode 100644
index 000000000..28140fe2f
--- /dev/null
+++ b/src/arrow/r/inst/include/cpp11/list.hpp
@@ -0,0 +1,138 @@
+// cpp11 version: 0.3.1.1
+// vendored on: 2021-08-11
+#pragma once
+
+#include <initializer_list>  // for initializer_list
+
+#include "cpp11/R.hpp"                // for SEXP, SEXPREC, SET_VECTOR_ELT
+#include "cpp11/attribute_proxy.hpp"  // for attribute_proxy
+#include "cpp11/named_arg.hpp"        // for named_arg
+#include "cpp11/protect.hpp"          // for preserved
+#include "cpp11/r_string.hpp"         // for r_string
+#include "cpp11/r_vector.hpp"         // for r_vector, r_vector<>::proxy
+#include "cpp11/sexp.hpp"             // for sexp
+
+// Specializations for list
+
+namespace cpp11 {
+
+template <>
+inline SEXP r_vector<SEXP>::valid_type(SEXP data) {
+  if (TYPEOF(data) != VECSXP) {
+    throw type_error(VECSXP, TYPEOF(data));
+  }
+  return data;
+}
+
+template <>
+inline SEXP r_vector<SEXP>::operator[](const R_xlen_t pos) const {
+  return VECTOR_ELT(data_, pos);
+}
+
+template <>
+inline SEXP r_vector<SEXP>::operator[](const r_string& name) const {
+  SEXP names = this->names();
+  R_xlen_t size = Rf_xlength(names);
+
+  for (R_xlen_t pos = 0; pos < size; ++pos) {
+    auto cur = Rf_translateCharUTF8(STRING_ELT(names, pos));
+    if (name == cur) {
+      return operator[](pos);
+    }
+  }
+  return R_NilValue;
+}
+
+template <>
+inline SEXP* r_vector<SEXP>::get_p(bool, SEXP) {
+  return nullptr;
+}
+
+template <>
+inline void r_vector<SEXP>::const_iterator::fill_buf(R_xlen_t) {
+  return;
+}
+
+template <>
+inline SEXP r_vector<SEXP>::const_iterator::operator*() const {
+  return VECTOR_ELT(data_->data(), pos_);
+}
+
+typedef r_vector<SEXP> list;
+
+namespace writable {
+
+template <>
+inline typename r_vector<SEXP>::proxy& r_vector<SEXP>::proxy::operator=(const SEXP& rhs) {
+  SET_VECTOR_ELT(data_, index_, rhs);
+  return *this;
+}
+
+template <>
+inline r_vector<SEXP>::proxy::operator SEXP() const {
+  return VECTOR_ELT(data_, index_);
+}
+
+template <>
+inline r_vector<SEXP>::r_vector(std::initializer_list<SEXP> il)
+    : cpp11::r_vector<SEXP>(safe[Rf_allocVector](VECSXP, il.size())),
+      capacity_(il.size()) {
+  protect_ = preserved.insert(data_);
+  auto it = il.begin();
+  for (R_xlen_t i = 0; i < capacity_; ++i, ++it) {
+    SET_VECTOR_ELT(data_, i, *it);
+  }
+}
+
+template <>
+inline r_vector<SEXP>::r_vector(std::initializer_list<named_arg> il)
+    : cpp11::r_vector<SEXP>(safe[Rf_allocVector](VECSXP, il.size())),
+      capacity_(il.size()) {
+  protect_ = preserved.insert(data_);
+  int n_protected = 0;
+
+  try {
+    unwind_protect([&] {
+      Rf_setAttrib(data_, R_NamesSymbol, Rf_allocVector(STRSXP, capacity_));
+      SEXP names = PROTECT(Rf_getAttrib(data_, R_NamesSymbol));
+      ++n_protected;
+      auto it = il.begin();
+      for (R_xlen_t i = 0; i < capacity_; ++i, ++it) {
+        SET_VECTOR_ELT(data_, i, it->value());
+        SET_STRING_ELT(names, i, Rf_mkCharCE(it->name(), CE_UTF8));
+      }
+      UNPROTECT(n_protected);
+    });
+  } catch (const unwind_exception& e) {
+    preserved.release(protect_);
+    UNPROTECT(n_protected);
+    throw e;
+  }
+}
+
+template <>
+inline void r_vector<SEXP>::reserve(R_xlen_t new_capacity) {
+  data_ = data_ == R_NilValue ? safe[Rf_allocVector](VECSXP, new_capacity)
+                              : safe[Rf_xlengthgets](data_, new_capacity);
+
+  SEXP old_protect = protect_;
+  protect_ = preserved.insert(data_);
+  preserved.release(old_protect);
+
+  capacity_ = new_capacity;
+}
+
+template <>
+inline void r_vector<SEXP>::push_back(SEXP value) {
+  while (length_ >= capacity_) {
+    reserve(capacity_ == 0 ? 1 : capacity_ *= 2);
+  }
+  SET_VECTOR_ELT(data_, length_, value);
+  ++length_;
+}
+
+typedef r_vector<SEXP> list;
+
+}  // namespace writable
+
+}  // namespace cpp11