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libexpr: make ExprCall::args an std::optional

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This commit is contained in:
Taeer Bar-Yam 2025-11-23 00:05:07 +01:00
parent 43fc6c314d
commit 484f40fc64
4 changed files with 10 additions and 7 deletions
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6
src/libexpr/eval.cc
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@ -1751,9 +1751,9 @@ void ExprCall::eval(EvalState & state, Env & env, Value & v)
// 4: about 60
// 5: under 10
// This excluded attrset lambdas (`{...}:`). Contributions of mixed lambdas appears insignificant at ~150 total.
SmallValueVector<4> vArgs(args.size());
for (size_t i = 0; i < args.size(); ++i)
vArgs[i] = args[i]->maybeThunk(state, env);
SmallValueVector<4> vArgs(args->size());
for (size_t i = 0; i < args->size(); ++i)
vArgs[i] = (*args)[i]->maybeThunk(state, env);
state.callFunction(vFun, vArgs, v, pos);
}

5
src/libexpr/include/nix/expr/nixexpr.hh
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@ -592,7 +592,10 @@ public:
struct ExprCall : Expr
{
Expr * fun;
std::pmr::vector<Expr *> args;
/**
* args will never be null. See comment on ExprAttrs::AttrDefs below.
*/
std::optional<std::pmr::vector<Expr *>> args;
PosIdx pos;
std::optional<PosIdx> cursedOrEndPos; // used during parsing to warn about https://github.com/NixOS/nix/issues/11118

4
src/libexpr/nixexpr.cc
View file

@ -191,7 +191,7 @@ void ExprCall::show(const SymbolTable & symbols, std::ostream & str) const
{
str << '(';
fun->show(symbols, str);
for (auto e : args) {
for (auto e : *args) {
str << ' ';
e->show(symbols, str);
}
@ -490,7 +490,7 @@ void ExprCall::bindVars(EvalState & es, const std::shared_ptr<const StaticEnv> &
es.exprEnvs.insert(std::make_pair(this, env));
fun->bindVars(es, env);
for (auto e : args)
for (auto e : *args)
e->bindVars(es, env);
}

2
src/libexpr/parser.y
View file

@ -115,7 +115,7 @@ static void setDocPosition(const LexerState & lexerState, ExprLambda * lambda, P
static Expr * makeCall(Exprs & exprs, PosIdx pos, Expr * fn, Expr * arg) {
if (auto e2 = dynamic_cast<ExprCall *>(fn)) {
e2->args.push_back(arg);
e2->args->push_back(arg);
return fn;
}
return exprs.add<ExprCall>(pos, fn, {arg});