lix/src/libexpr/primops.hh

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2020-10-06 08:18:44 +00:00
#pragma once
///@file
2020-10-06 08:18:44 +00:00
#include "eval.hh"
#include <tuple>
#include <vector>
namespace nix {
struct RegisterPrimOp
{
struct Info
{
std::string name;
std::vector<std::string> args;
size_t arity = 0;
const char * doc;
PrimOpFun fun;
std::optional<ExperimentalFeature> experimentalFeature;
};
typedef std::vector<Info> PrimOps;
static PrimOps * primOps;
/**
* You can register a constant by passing an arity of 0. fun
* will get called during EvalState initialization, so there
* may be primops not yet added and builtins is not yet sorted.
*/
RegisterPrimOp(Info && info);
};
/* These primops are disabled without enableNativeCode, but plugins
may wish to use them in limited contexts without globally enabling
them. */
/**
* Load a ValueInitializer from a DSO and return whatever it initializes
*/
void prim_importNative(EvalState & state, const PosIdx pos, Value * * args, Value & v);
/**
* Execute a program and parse its output
*/
void prim_exec(EvalState & state, const PosIdx pos, Value * * args, Value & v);
}