* Fixed builtins.genericClosure.
This commit is contained in:
Eelco Dolstra
parent
fe2d869e04
commit
0777448ca6
3 changed files with 61 additions and 25 deletions
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@ -73,21 +73,25 @@ std::ostream & operator << (std::ostream & str, Value & v)
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}
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string showType(Value & v)
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string showType(const Value & v)
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{
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switch (v.type) {
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case tInt: return "an integer";
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case tBool: return "a boolean";
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case tString: return "a string";
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case tPath: return "a path";
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case tNull: return "null";
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case tAttrs: return "an attribute set";
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case tList: return "a list";
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case tNull: return "null";
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case tThunk: return "a thunk";
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case tApp: return "a function application";
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case tLambda: return "a function";
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case tCopy: return "a copy";
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case tBlackhole: return "a black hole";
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case tPrimOp: return "a built-in function";
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case tPrimOpApp: return "a partially applied built-in function";
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default: throw Error(format("unknown type: %1%") % v.type);
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}
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abort();
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}
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@ -304,7 +304,7 @@ private:
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/* Return a string representing the type of the value `v'. */
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string showType(Value & v);
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string showType(const Value & v);
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}
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@ -84,7 +84,26 @@ static void prim_isBool(EvalState & state, Value * * args, Value & v)
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}
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#if 0
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struct CompareValues
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{
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bool operator () (const Value & v1, const Value & v2) const
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{
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if (v1.type != v2.type)
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throw EvalError("cannot compare values of different types");
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switch (v1.type) {
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case tInt:
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return v1.integer < v2.integer;
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case tString:
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return strcmp(v1.string.s, v2.string.s) < 0;
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case tPath:
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return strcmp(v1.path, v2.path) < 0;
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default:
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throw EvalError(format("cannot compare %1% with %2%") % showType(v1) % showType(v2));
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}
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}
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};
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static void prim_genericClosure(EvalState & state, Value * * args, Value & v)
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{
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startNest(nest, lvlDebug, "finding dependencies");
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@ -98,45 +117,60 @@ static void prim_genericClosure(EvalState & state, Value * * args, Value & v)
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throw EvalError("attribute `startSet' required");
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state.forceList(startSet->second);
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list<Value> workSet;
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list<Value *> workSet;
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for (unsigned int n = 0; n < startSet->second.list.length; ++n)
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workSet.push_back(*startSet->second.list.elems[n]);
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workSet.push_back(startSet->second.list.elems[n]);
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/* Get the operator. */
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Bindings::iterator op =
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args[0]->attrs->find(state.symbols.create("operator"));
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if (op == args[0]->attrs->end())
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throw EvalError("attribute `operator' required");
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state.forceValue(op->second);
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/* Construct the closure by applying the operator to element of
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`workSet', adding the result to `workSet', continuing until
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no new elements are found. */
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list<Value> res;
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set<Expr> doneKeys; // !!! gc roots
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set<Value, CompareValues> doneKeys;
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while (!workSet.empty()) {
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Expr e = *(workSet.begin());
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workSet.erase(e);
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Value * e = *(workSet.begin());
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workSet.pop_front();
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e = strictEvalExpr(state, e);
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state.forceAttrs(*e);
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Expr key = queryAttr(e, "key");
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if (!key) throw EvalError("attribute `key' required");
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Bindings::iterator key =
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e->attrs->find(state.symbols.create("key"));
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if (key == e->attrs->end())
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throw EvalError("attribute `key' required");
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state.forceValue(key->second);
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if (doneKeys.find(key) != doneKeys.end()) continue;
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doneKeys.insert(key);
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res = ATinsert(res, e);
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if (doneKeys.find(key->second) != doneKeys.end()) continue;
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doneKeys.insert(key->second);
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res.push_back(*e);
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/* Call the `operator' function with `e' as argument. */
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ATermList res = evalList(state, makeCall(op, e));
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Value call;
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mkApp(call, op->second, *e);
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state.forceList(call);
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/* Try to find the dependencies relative to the `path'. */
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for (ATermIterator i(res); i; ++i)
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workSet.insert(evalExpr(state, *i));
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/* Add the values returned by the operator to the work set. */
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for (unsigned int n = 0; n < call.list.length; ++n) {
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state.forceValue(*call.list.elems[n]);
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workSet.push_back(call.list.elems[n]);
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}
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}
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return makeList(res);
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/* Create the result list. */
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state.mkList(v, res.size());
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Value * vs = state.allocValues(res.size());
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unsigned int n = 0;
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foreach (list<Value>::iterator, i, res) {
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v.list.elems[n] = &vs[n];
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vs[n++] = *i;
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}
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}
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#endif
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static void prim_abort(EvalState & state, Value * * args, Value & v)
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@ -1017,9 +1051,7 @@ void EvalState::createBaseEnv()
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addPrimOp("__isString", 1, prim_isString);
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addPrimOp("__isInt", 1, prim_isInt);
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addPrimOp("__isBool", 1, prim_isBool);
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#if 0
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addPrimOp("__genericClosure", 1, prim_genericClosure);
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#endif
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addPrimOp("abort", 1, prim_abort);
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addPrimOp("throw", 1, prim_throw);
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#if 0
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