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Bindings: Add a method for iterating in lexicographically sorted order

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This commit is contained in:
Eelco Dolstra 2017-01-25 16:06:50 +01:00
parent b1f001538e
commit 54801ed6ad
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GPG key ID: 8170B4726D7198DE
4 changed files with 28 additions and 28 deletions
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13
src/libexpr/attr-set.hh
View file

@ -75,6 +75,19 @@ public:
size_t capacity() { return capacity_; }
/* Returns the attributes in lexicographically sorted order. */
std::vector<const Attr *> lexicographicOrder() const
{
std::vector<const Attr *> res;
res.reserve(size_);
for (size_t n = 0; n < size_; n++)
res.emplace_back(&attrs[n]);
std::sort(res.begin(), res.end(), [](const Attr * a, const Attr * b) {
return (string) a->name < (string) b->name;
});
return res;
}
friend class EvalState;
};

10
src/libexpr/eval.cc
View file

@ -91,13 +91,9 @@ static void printValue(std::ostream & str, std::set<const Value *> & active, con
break;
case tAttrs: {
str << "{ ";
typedef std::map<string, Value *> Sorted;
Sorted sorted;
for (auto & i : *v.attrs)
sorted[i.name] = i.value;
for (auto & i : sorted) {
str << i.first << " = ";
printValue(str, active, *i.second);
for (auto & i : v.attrs->lexicographicOrder()) {
str << i->name << " = ";
printValue(str, active, *i->value);
str << "; ";
}
str << "}";

24
src/libexpr/get-drvs.cc
View file

@ -284,25 +284,19 @@ static void getDerivations(EvalState & state, Value & vIn,
there are names clashes between derivations, the derivation
bound to the attribute with the "lower" name should take
precedence). */
typedef std::map<string, Symbol> SortedSymbols;
SortedSymbols attrs;
for (auto & i : *v.attrs)
attrs.insert(std::pair<string, Symbol>(i.name, i.name));
for (auto & i : attrs) {
Activity act(*logger, lvlDebug, format("evaluating attribute ‘%1%’") % i.first);
string pathPrefix2 = addToPath(pathPrefix, i.first);
Value & v2(*v.attrs->find(i.second)->value);
for (auto & i : v.attrs->lexicographicOrder()) {
Activity act(*logger, lvlDebug, format("evaluating attribute ‘%1%’") % i->name);
string pathPrefix2 = addToPath(pathPrefix, i->name);
if (combineChannels)
getDerivations(state, v2, pathPrefix2, autoArgs, drvs, done, ignoreAssertionFailures);
else if (getDerivation(state, v2, pathPrefix2, drvs, done, ignoreAssertionFailures)) {
getDerivations(state, *i->value, pathPrefix2, autoArgs, drvs, done, ignoreAssertionFailures);
else if (getDerivation(state, *i->value, pathPrefix2, drvs, done, ignoreAssertionFailures)) {
/* If the value of this attribute is itself a set,
should we recurse into it? => Only if it has a
`recurseForDerivations = true' attribute. */
if (v2.type == tAttrs) {
Bindings::iterator j = v2.attrs->find(state.symbols.create("recurseForDerivations"));
if (j != v2.attrs->end() && state.forceBool(*j->value, *j->pos))
getDerivations(state, v2, pathPrefix2, autoArgs, drvs, done, ignoreAssertionFailures);
if (i->value->type == tAttrs) {
Bindings::iterator j = i->value->attrs->find(state.symbols.create("recurseForDerivations"));
if (j != i->value->attrs->end() && state.forceBool(*j->value, *j->pos))
getDerivations(state, *i->value, pathPrefix2, autoArgs, drvs, done, ignoreAssertionFailures);
}
}
}

9
src/libexpr/primops.cc
View file

@ -998,12 +998,9 @@ static void prim_attrNames(EvalState & state, const Pos & pos, Value * * args, V
state.mkList(v, args[0]->attrs->size());
unsigned int n = 0;
for (auto & i : *args[0]->attrs)
mkString(*(v.listElems()[n++] = state.allocValue()), i.name);
std::sort(v.listElems(), v.listElems() + n,
[](Value * v1, Value * v2) { return strcmp(v1->string.s, v2->string.s) < 0; });
size_t n = 0;
for (auto & i : args[0]->attrs->lexicographicOrder())
mkString(*(v.listElems()[n++] = state.allocValue()), i->name);
}