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Always store the children of attribute sets

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This commit is contained in:
regnat 2021-02-16 11:38:26 +01:00
parent 357e095a7b
commit 7568cbe344
1 changed files with 19 additions and 6 deletions
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25
src/libexpr/eval.cc
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@ -1385,14 +1385,18 @@ EvalState::AttrAccesResult EvalState::getOptionalAttrField(Value & attrs, const
resultingCursor.addFailedChild(name, e);
throw;
};
resultingCursor = resultingCursor.addChild(name, *currentValue);
if (cacheResult.returnCode == ValueCache::CacheMiss && currentValue->type() == nAttrs) {
resultingCursor.addAttrSetChilds(*currentValue->attrs);
if (cacheResult.returnCode == ValueCache::CacheMiss) {
resultingCursor = resultingCursor.addChild(name, *currentValue);
currentValue->setCache(resultingCursor);
}
currentValue->setCache(resultingCursor);
if (countCalls && pos2) attrSelects[*pos2]++;
}
if (cacheResult.returnCode != ValueCache::CacheMiss) {
resultingCursor = dest.getCache();
currentValue->setCache(resultingCursor);
}
dest = *currentValue;
return { .pos = pos2 };
}
@ -1410,7 +1414,12 @@ ValueCache ValueCache::addChild(const Symbol& name, const Value& value)
{
if (!rawCache)
return ValueCache::empty;
return ValueCache(rawCache->addChild(name, cachedValueFor(value)));
auto cachedValue = cachedValueFor(value);
auto ret = ValueCache(rawCache->addChild(name, cachedValue));
if (value.type() == nAttrs)
ret.addAttrSetChilds(*value.attrs);
return ret;
}
ValueCache ValueCache::addFailedChild(const Symbol& name, const Error & error)
@ -1428,7 +1437,11 @@ void ValueCache::addAttrSetChilds(Bindings & children)
{
if (!rawCache) return;
for (auto & attr : children) {
addChild(attr.name, *attr.value);
// We could in theory directly store the value, but that would cause
// an infinite recursion in case of a cyclic attrset.
// So in a first time, just store a thunk
rawCache->addChild(attr.name, tree_cache::thunk_t{});
/* addChild(attr.name, *attr.value); */
}
}