forked from lix-project/lix
6526d1676b
Pos objects are somewhat wasteful as they duplicate the origin file name and input type for each object. on files that produce more than one Pos when parsed this a sizeable waste of memory (one pointer per Pos). the same goes for ptr<Pos> on 64 bit machines: parsing enough source to require 8 bytes to locate a position would need at least 8GB of input and 64GB of expression memory. it's not likely that we'll hit that any time soon, so we can use a uint32_t index to locate positions instead.
83 lines
2.6 KiB
C++
83 lines
2.6 KiB
C++
#include "primops.hh"
|
|
#include "eval-inline.hh"
|
|
|
|
#include "../../toml11/toml.hpp"
|
|
|
|
namespace nix {
|
|
|
|
static void prim_fromTOML(EvalState & state, const PosIdx pos, Value * * args, Value & val)
|
|
{
|
|
auto toml = state.forceStringNoCtx(*args[0], pos);
|
|
|
|
std::istringstream tomlStream(std::string{toml});
|
|
|
|
std::function<void(Value &, toml::value)> visit;
|
|
|
|
visit = [&](Value & v, toml::value t) {
|
|
|
|
switch(t.type())
|
|
{
|
|
case toml::value_t::table:
|
|
{
|
|
auto table = toml::get<toml::table>(t);
|
|
|
|
size_t size = 0;
|
|
for (auto & i : table) { (void) i; size++; }
|
|
|
|
auto attrs = state.buildBindings(size);
|
|
|
|
for(auto & elem : table)
|
|
visit(attrs.alloc(elem.first), elem.second);
|
|
|
|
v.mkAttrs(attrs);
|
|
}
|
|
break;;
|
|
case toml::value_t::array:
|
|
{
|
|
auto array = toml::get<std::vector<toml::value>>(t);
|
|
|
|
size_t size = array.size();
|
|
state.mkList(v, size);
|
|
for (size_t i = 0; i < size; ++i)
|
|
visit(*(v.listElems()[i] = state.allocValue()), array[i]);
|
|
}
|
|
break;;
|
|
case toml::value_t::boolean:
|
|
v.mkBool(toml::get<bool>(t));
|
|
break;;
|
|
case toml::value_t::integer:
|
|
v.mkInt(toml::get<int64_t>(t));
|
|
break;;
|
|
case toml::value_t::floating:
|
|
v.mkFloat(toml::get<NixFloat>(t));
|
|
break;;
|
|
case toml::value_t::string:
|
|
v.mkString(toml::get<std::string>(t));
|
|
break;;
|
|
case toml::value_t::local_datetime:
|
|
case toml::value_t::offset_datetime:
|
|
case toml::value_t::local_date:
|
|
case toml::value_t::local_time:
|
|
// We fail since Nix doesn't have date and time types
|
|
throw std::runtime_error("Dates and times are not supported");
|
|
break;;
|
|
case toml::value_t::empty:
|
|
v.mkNull();
|
|
break;;
|
|
|
|
}
|
|
};
|
|
|
|
try {
|
|
visit(val, toml::parse(tomlStream, "fromTOML" /* the "filename" */));
|
|
} catch (std::exception & e) { // TODO: toml::syntax_error
|
|
throw EvalError({
|
|
.msg = hintfmt("while parsing a TOML string: %s", e.what()),
|
|
.errPos = state.positions[pos]
|
|
});
|
|
}
|
|
}
|
|
|
|
static RegisterPrimOp primop_fromTOML("fromTOML", 1, prim_fromTOML);
|
|
|
|
}
|