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src/libexpr/primops.hh
56 строк
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pennae
use byte indexed locations for PosIdx
07 мар 2024, 01:48
07 мар 2024, 01:48
5d9fdab
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#pragma once ///@file #include "eval.hh" #include <tuple> #include <vector> namespace nix { /** * For functions where we do not expect deep recursion, we can use a sizable * part of the stack a free allocation space. * * Note: this is expected to be multiplied by sizeof(Value), or about 24 bytes. */ constexpr size_t nonRecursiveStackReservation = 128; /** * Functions that maybe applied to self-similar inputs, such as concatMap on a * tree, should reserve a smaller part of the stack for allocation. * * Note: this is expected to be multiplied by sizeof(Value), or about 24 bytes. */ constexpr size_t conservativeStackReservation = 16; struct RegisterPrimOp { typedef std::vector<PrimOp> 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(PrimOp && primOp); }; /* 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); void makePositionThunks(EvalState & state, const PosIdx pos, Value & line, Value & column); }