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Support range-based for loop over list values

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This commit is contained in:
Eelco Dolstra 2021-11-24 20:21:34 +01:00
parent ca82967ee3
commit b6c8e57056
10 changed files with 103 additions and 79 deletions
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82
src/libexpr/primops.cc
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@ -335,9 +335,8 @@ void prim_exec(EvalState & state, const Pos & pos, Value * * args, Value & v)
PathSet context;
auto program = state.coerceToString(pos, *elems[0], context, false, false);
Strings commandArgs;
for (unsigned int i = 1; i < args[0]->listSize(); ++i) {
for (unsigned int i = 1; i < args[0]->listSize(); ++i)
commandArgs.emplace_back(state.coerceToString(pos, *elems[i], context, false, false));
}
try {
state.realiseContext(context);
} catch (InvalidPathError & e) {
@ -616,8 +615,8 @@ static void prim_genericClosure(EvalState & state, const Pos & pos, Value * * ar
state.forceList(*startSet->value, pos);
ValueList workSet;
for (unsigned int n = 0; n < startSet->value->listSize(); ++n)
workSet.push_back(startSet->value->listElems()[n]);
for (auto elem : startSet->value->listItems())
workSet.push_back(elem);
/* Get the operator. */
Bindings::iterator op = getAttr(
@ -662,9 +661,9 @@ static void prim_genericClosure(EvalState & state, const Pos & pos, Value * * ar
state.forceList(call, pos);
/* Add the values returned by the operator to the work set. */
for (unsigned int n = 0; n < call.listSize(); ++n) {
state.forceValue(*call.listElems()[n], pos);
workSet.push_back(call.listElems()[n]);
for (auto elem : call.listItems()) {
state.forceValue(*elem, pos);
workSet.push_back(elem);
}
}
@ -1013,8 +1012,8 @@ static void prim_derivationStrict(EvalState & state, const Pos & pos, Value * *
command-line arguments to the builder. */
else if (i->name == state.sArgs) {
state.forceList(*i->value, pos);
for (unsigned int n = 0; n < i->value->listSize(); ++n) {
string s = state.coerceToString(posDrvName, *i->value->listElems()[n], context, true);
for (auto elem : i->value->listItems()) {
string s = state.coerceToString(posDrvName, *elem, context, true);
drv.args.push_back(s);
}
}
@ -1044,8 +1043,8 @@ static void prim_derivationStrict(EvalState & state, const Pos & pos, Value * *
/* Require ‘outputs’ to be a list of strings. */
state.forceList(*i->value, posDrvName);
Strings ss;
for (unsigned int n = 0; n < i->value->listSize(); ++n)
ss.emplace_back(state.forceStringNoCtx(*i->value->listElems()[n], posDrvName));
for (auto elem : i->value->listItems())
ss.emplace_back(state.forceStringNoCtx(*elem, posDrvName));
handleOutputs(ss);
}
@ -1460,20 +1459,19 @@ static void prim_findFile(EvalState & state, const Pos & pos, Value * * args, Va
SearchPath searchPath;
for (unsigned int n = 0; n < args[0]->listSize(); ++n) {
Value & v2(*args[0]->listElems()[n]);
state.forceAttrs(v2, pos);
for (auto v2 : args[0]->listItems()) {
state.forceAttrs(*v2, pos);
string prefix;
Bindings::iterator i = v2.attrs->find(state.symbols.create("prefix"));
if (i != v2.attrs->end())
Bindings::iterator i = v2->attrs->find(state.symbols.create("prefix"));
if (i != v2->attrs->end())
prefix = state.forceStringNoCtx(*i->value, pos);
i = getAttr(
state,
"findFile",
"path",
v2.attrs,
v2->attrs,
pos
);
@ -2239,9 +2237,9 @@ static void prim_removeAttrs(EvalState & state, const Pos & pos, Value * * args,
/* Get the attribute names to be removed. */
std::set<Symbol> names;
for (unsigned int i = 0; i < args[1]->listSize(); ++i) {
state.forceStringNoCtx(*args[1]->listElems()[i], pos);
names.insert(state.symbols.create(args[1]->listElems()[i]->string.s));
for (auto elem : args[1]->listItems()) {
state.forceStringNoCtx(*elem, pos);
names.insert(state.symbols.create(elem->string.s));
}
/* Copy all attributes not in that set. Note that we don't need
@ -2249,7 +2247,7 @@ static void prim_removeAttrs(EvalState & state, const Pos & pos, Value * * args,
vector. */
state.mkAttrs(v, args[0]->attrs->size());
for (auto & i : *args[0]->attrs) {
if (names.find(i.name) == names.end())
if (!names.count(i.name))
v.attrs->push_back(i);
}
}
@ -2283,15 +2281,14 @@ static void prim_listToAttrs(EvalState & state, const Pos & pos, Value * * args,
std::set<Symbol> seen;
for (unsigned int i = 0; i < args[0]->listSize(); ++i) {
Value & v2(*args[0]->listElems()[i]);
state.forceAttrs(v2, pos);
for (auto v2 : args[0]->listItems()) {
state.forceAttrs(*v2, pos);
Bindings::iterator j = getAttr(
state,
"listToAttrs",
state.sName,
v2.attrs,
v2->attrs,
pos
);
@ -2303,7 +2300,7 @@ static void prim_listToAttrs(EvalState & state, const Pos & pos, Value * * args,
state,
"listToAttrs",
state.sValue,
v2.attrs,
v2->attrs,
pos
);
v.attrs->push_back(Attr(sym, j2->value, j2->pos));
@ -2370,11 +2367,10 @@ static void prim_catAttrs(EvalState & state, const Pos & pos, Value * * args, Va
Value * res[args[1]->listSize()];
unsigned int found = 0;
for (unsigned int n = 0; n < args[1]->listSize(); ++n) {
Value & v2(*args[1]->listElems()[n]);
state.forceAttrs(v2, pos);
Bindings::iterator i = v2.attrs->find(attrName);
if (i != v2.attrs->end())
for (auto v2 : args[1]->listItems()) {
state.forceAttrs(*v2, pos);
Bindings::iterator i = v2->attrs->find(attrName);
if (i != v2->attrs->end())
res[found++] = i->value;
}
@ -2649,8 +2645,8 @@ static void prim_elem(EvalState & state, const Pos & pos, Value * * args, Value
{
bool res = false;
state.forceList(*args[1], pos);
for (unsigned int n = 0; n < args[1]->listSize(); ++n)
if (state.eqValues(*args[0], *args[1]->listElems()[n])) {
for (auto elem : args[1]->listItems())
if (state.eqValues(*args[0], *elem)) {
res = true;
break;
}
@ -2709,8 +2705,8 @@ static void prim_foldlStrict(EvalState & state, const Pos & pos, Value * * args,
if (args[2]->listSize()) {
Value * vCur = args[1];
for (unsigned int n = 0; n < args[2]->listSize(); ++n) {
Value * vs []{vCur, args[2]->listElems()[n]};
for (auto [n, elem] : enumerate(args[2]->listItems())) {
Value * vs []{vCur, elem};
vCur = n == args[2]->listSize() - 1 ? &v : state.allocValue();
state.callFunction(*args[0], 2, vs, *vCur, pos);
}
@ -2740,8 +2736,8 @@ static void anyOrAll(bool any, EvalState & state, const Pos & pos, Value * * arg
state.forceList(*args[1], pos);
Value vTmp;
for (unsigned int n = 0; n < args[1]->listSize(); ++n) {
state.callFunction(*args[0], *args[1]->listElems()[n], vTmp, pos);
for (auto elem : args[1]->listItems()) {
state.callFunction(*args[0], *elem, vTmp, pos);
bool res = state.forceBool(vTmp, pos);
if (res == any) {
mkBool(v, any);
@ -3470,9 +3466,9 @@ static void prim_concatStringsSep(EvalState & state, const Pos & pos, Value * *
res.reserve((args[1]->listSize() + 32) * sep.size());
bool first = true;
for (unsigned int n = 0; n < args[1]->listSize(); ++n) {
for (auto elem : args[1]->listItems()) {
if (first) first = false; else res += sep;
res += state.coerceToString(pos, *args[1]->listElems()[n], context);
res += state.coerceToString(pos, *elem, context);
}
mkString(v, res, context);
@ -3501,14 +3497,14 @@ static void prim_replaceStrings(EvalState & state, const Pos & pos, Value * * ar
vector<string> from;
from.reserve(args[0]->listSize());
for (unsigned int n = 0; n < args[0]->listSize(); ++n)
from.push_back(state.forceString(*args[0]->listElems()[n], pos));
for (auto elem : args[0]->listItems())
from.push_back(state.forceString(*elem, pos));
vector<std::pair<string, PathSet>> to;
to.reserve(args[1]->listSize());
for (unsigned int n = 0; n < args[1]->listSize(); ++n) {
for (auto elem : args[1]->listItems()) {
PathSet ctx;
auto s = state.forceString(*args[1]->listElems()[n], ctx, pos);
auto s = state.forceString(*elem, ctx, pos);
to.push_back(std::make_pair(std::move(s), std::move(ctx)));
}