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Make primop registration pluggable

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This way we don't have to put all primops in one giant file.
This commit is contained in:
Eelco Dolstra 2016-04-13 11:15:45 +02:00
parent 96515b0c0d
commit 12b257f045
4 changed files with 33 additions and 3 deletions
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4
src/libexpr/eval.hh
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@ -26,9 +26,9 @@ typedef void (* PrimOpFun) (EvalState & state, const Pos & pos, Value * * args,
struct PrimOp
{
PrimOpFun fun;
unsigned int arity;
size_t arity;
Symbol name;
PrimOp(PrimOpFun fun, unsigned int arity, Symbol name)
PrimOp(PrimOpFun fun, size_t arity, Symbol name)
: fun(fun), arity(arity), name(name) { }
};

2
src/libexpr/local.mk
View file

@ -4,7 +4,7 @@ libexpr_NAME = libnixexpr
libexpr_DIR := $(d)
libexpr_SOURCES := $(wildcard $(d)/*.cc) $(d)/lexer-tab.cc $(d)/parser-tab.cc
libexpr_SOURCES := $(wildcard $(d)/*.cc) $(wildcard $(d)/primops/*.cc) $(d)/lexer-tab.cc $(d)/parser-tab.cc
libexpr_CXXFLAGS := -Wno-deprecated-register

15
src/libexpr/primops.cc
View file

@ -10,6 +10,7 @@
#include "util.hh"
#include "value-to-json.hh"
#include "value-to-xml.hh"
#include "primops.hh"
#include <sys/types.h>
#include <sys/stat.h>
@ -1725,6 +1726,16 @@ static void prim_fetchTarball(EvalState & state, const Pos & pos, Value * * args
*************************************************************/
RegisterPrimOp::PrimOps * RegisterPrimOp::primOps;
RegisterPrimOp::RegisterPrimOp(std::string name, size_t arity, PrimOpFun fun)
{
if (!primOps) primOps = new PrimOps;
primOps->emplace_back(name, arity, fun);
}
void EvalState::createBaseEnv()
{
baseEnv.up = 0;
@ -1889,6 +1900,10 @@ void EvalState::createBaseEnv()
}
addConstant("__nixPath", v);
if (RegisterPrimOp::primOps)
for (auto & primOp : *RegisterPrimOp::primOps)
addPrimOp(std::get<0>(primOp), std::get<1>(primOp), std::get<2>(primOp));
/* Now that we've added all primops, sort the `builtins' set,
because attribute lookups expect it to be sorted. */
baseEnv.values[0]->attrs->sort();

15
src/libexpr/primops.hh Normal file
View file

@ -0,0 +1,15 @@
#include "eval.hh"
#include <tuple>
#include <vector>
namespace nix {
struct RegisterPrimOp
{
typedef std::vector<std::tuple<std::string, size_t, PrimOpFun>> PrimOps;
static PrimOps * primOps;
RegisterPrimOp(std::string name, size_t arity, PrimOpFun fun);
};
}