#include "cpptoml/cpptoml.h"
#include "libexpr/eval-inline.hh"
#include "libexpr/primops.hh"
namespace nix {
static void prim_fromTOML(EvalState& state, const Pos& pos, Value** args,
Value& v) {
using namespace cpptoml;
auto toml = state.forceStringNoCtx(*args[0], pos);
std::istringstream tomlStream(toml);
std::function<void(Value&, std::shared_ptr<base>)> visit;
visit = [&](Value& v, std::shared_ptr<base> t) {
if (auto t2 = t->as_table()) {
size_t size = 0;
for (auto& i : *t2) {
(void)i;
size++;
}
state.mkAttrs(v, size);
for (auto& i : *t2) {
auto& v2 = *state.allocAttr(v, state.symbols.Create(i.first));
if (auto i2 = i.second->as_table_array()) {
size_t size2 = i2->get().size();
state.mkList(v2, size2);
for (size_t j = 0; j < size2; ++j)
visit(*((*v2.list)[j] = state.allocValue()), i2->get()[j]);
} else
visit(v2, i.second);
}
}
else if (auto t2 = t->as_array()) {
size_t size = t2->get().size();
state.mkList(v, size);
for (size_t i = 0; i < size; ++i)
visit(*((*v.list)[i] = state.allocValue()), t2->get()[i]);
}
// Handle cases like 'a = [[{ a = true }]]', which IMHO should be
// parsed as a array containing an array containing a table,
// but instead are parsed as an array containing a table array
// containing a table.
else if (auto t2 = t->as_table_array()) {
size_t size = t2->get().size();
state.mkList(v, size);
for (size_t j = 0; j < size; ++j)
visit(*((*v.list)[j] = state.allocValue()), t2->get()[j]);
}
else if (t->is_value()) {
if (auto val = t->as<int64_t>())
mkInt(v, val->get());
else if (auto val = t->as<NixFloat>())
mkFloat(v, val->get());
else if (auto val = t->as<bool>())
mkBool(v, val->get());
else if (auto val = t->as<std::string>())
mkString(v, val->get());
else
throw EvalError("unsupported value type in TOML");
}
else
abort();
};
try {
visit(v, parser(tomlStream).parse());
} catch (std::runtime_error& e) {
throw EvalError("while parsing a TOML string at %s: %s", pos, e.what());
}
}
static RegisterPrimOp r("fromTOML", 1, prim_fromTOML);
} // namespace nix
