max/nix-super
1
0
Fork 0
mirror of https://github.com/privatevoid-net/nix-super.git synced 2024-11-25 23:36:16 +02:00
Code Issues Projects Releases Packages Wiki Activity Actions

Make forceValueDeep work on values with cycles

Browse source
This commit is contained in:
Eelco Dolstra 2014-09-22 15:16:09 +02:00
parent 1e0a799bef
commit 831fc8ea21
1 changed files with 20 additions and 9 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

15
src/libexpr/eval.cc
View file

@ -1183,17 +1183,28 @@ void ExprPos::eval(EvalState & state, Env & env, Value & v)
void EvalState::forceValueDeep(Value & v)
{
std::set<const Value *> seen;
std::function<void(Value & v)> recurse;
recurse = [&](Value & v) {
if (seen.find(&v) != seen.end()) return;
seen.insert(&v);
forceValue(v);
if (v.type == tAttrs) {
foreach (Bindings::iterator, i, *v.attrs)
forceValueDeep(*i->value);
recurse(*i->value);
}
else if (v.type == tList) {
for (unsigned int n = 0; n < v.list.length; ++n)
forceValueDeep(*v.list.elems[n]);
recurse(*v.list.elems[n]);
}
};
recurse(v);
}