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* Keep attribute sets in sorted order to speed up attribute lookups.

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* Simplify the representation of attributes in the AST.
* Change the behaviour of listToAttrs() in case of duplicate names.
This commit is contained in:
Eelco Dolstra 2010-10-24 19:52:33 +00:00
parent 2dc6d50941
commit e0b7fb8f27
12 changed files with 186 additions and 148 deletions
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32
src/libexpr/primops.cc
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@ -209,14 +209,13 @@ static void prim_tryEval(EvalState & state, Value * * args, Value & v)
state.mkAttrs(v);
try {
state.forceValue(*args[0]);
printMsg(lvlError, format("%1%") % *args[0]);
(*v.attrs)[state.symbols.create("value")].value = args[0];
v.attrs->push_back(Attr(state.symbols.create("value"), args[0]));
mkBool(*state.allocAttr(v, state.symbols.create("success")), true);
printMsg(lvlError, format("%1%") % v);
} catch (AssertionError & e) {
mkBool(*state.allocAttr(v, state.symbols.create("value")), false);
mkBool(*state.allocAttr(v, state.symbols.create("success")), false);
}
v.attrs->sort();
}
@ -488,6 +487,7 @@ static void prim_derivationStrict(EvalState & state, Value * * args, Value & v)
state.mkAttrs(v);
mkString(*state.allocAttr(v, state.sOutPath), outPath, singleton<PathSet>(drvPath));
mkString(*state.allocAttr(v, state.sDrvPath), drvPath, singleton<PathSet>("=" + drvPath));
v.attrs->sort();
}
@ -742,7 +742,9 @@ static void prim_removeAttrs(EvalState & state, Value * * args, Value & v)
names.insert(state.symbols.create(args[1]->list.elems[i]->string.s));
}
/* Copy all attributes not in that set. */
/* Copy all attributes not in that set. Note that we don't need
to sort v.attrs because it's a subset of an already sorted
vector. */
state.mkAttrs(v);
foreach (Bindings::iterator, i, *args[0]->attrs) {
if (names.find(i->name) == names.end())
@ -761,6 +763,8 @@ static void prim_listToAttrs(EvalState & state, Value * * args, Value & v)
state.mkAttrs(v);
std::set<Symbol> seen;
for (unsigned int i = 0; i < args[0]->list.length; ++i) {
Value & v2(*args[0]->list.elems[i]);
state.forceAttrs(v2);
@ -774,10 +778,15 @@ static void prim_listToAttrs(EvalState & state, Value * * args, Value & v)
if (j2 == v2.attrs->end())
throw TypeError("`value' attribute missing in a call to `listToAttrs'");
Attr & a = (*v.attrs)[state.symbols.create(name)];
a.value = j2->value;
a.pos = j2->pos;
Symbol sym = state.symbols.create(name);
if (seen.find(sym) == seen.end()) {
v.attrs->push_back(Attr(sym, j2->value, j2->pos));
seen.insert(sym);
}
/* !!! Throw an error if `name' already exists? */
}
v.attrs->sort();
}
@ -825,6 +834,8 @@ static void prim_functionArgs(EvalState & state, Value * * args, Value & v)
foreach (Formals::Formals_::iterator, i, args[0]->lambda.fun->formals->formals)
// !!! should optimise booleans (allocate only once)
mkBool(*state.allocAttr(v, i->name), i->def);
v.attrs->sort();
}
@ -1007,6 +1018,7 @@ static void prim_parseDrvName(EvalState & state, Value * * args, Value & v)
state.mkAttrs(v);
mkString(*state.allocAttr(v, state.sName), parsed.name);
mkString(*state.allocAttr(v, state.symbols.create("version")), parsed.version);
v.attrs->sort();
}
@ -1119,7 +1131,11 @@ void EvalState::createBaseEnv()
// Versions
addPrimOp("__parseDrvName", 1, prim_parseDrvName);
addPrimOp("__compareVersions", 2, prim_compareVersions);
addPrimOp("__compareVersions", 2, prim_compareVersions);
/* Now that we've added all primops, sort the `builtins' attribute
set, because attribute lookups expect it to be sorted. */
baseEnv.values[0]->attrs->sort();
}