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give ExprInheritFrom a handle to what its standing in for

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Change-Id: I12088e0b618407e5432523bbc97be63c8d6fce62
This commit is contained in:
Qyriad 2024-07-02 17:29:19 -06:00
parent e040b762a4
commit 4f0c27abe1
3 changed files with 16 additions and 8 deletions
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7
src/libexpr/nixexpr.hh
View file

@ -144,7 +144,10 @@ struct ExprVar : Expr
*/
struct ExprInheritFrom : ExprVar
{
ExprInheritFrom(PosIdx pos, Displacement displ): ExprVar(pos, {})
ref<Expr> fromExpr;
ExprInheritFrom(PosIdx pos, Displacement displ, ref<Expr> fromExpr)
: ExprVar(pos, {}), fromExpr(fromExpr)
{
this->level = 0;
this->displ = displ;
@ -222,7 +225,7 @@ struct ExprAttrs : Expr
};
typedef std::map<Symbol, AttrDef> AttrDefs;
AttrDefs attrs;
std::unique_ptr<std::vector<std::unique_ptr<Expr>>> inheritFromExprs;
std::unique_ptr<std::vector<ref<Expr>>> inheritFromExprs;
struct DynamicAttrDef {
std::unique_ptr<Expr> nameExpr, valueExpr;
PosIdx pos;

15
src/libexpr/parser/parser.cc
View file

@ -317,18 +317,23 @@ template<> struct BuildAST<grammar::inherit> : change_head<InheritState> {
});
}
}
if (auto fromE = std::move(s.from)) {
if (s.from != nullptr) {
if (!b.attrs.inheritFromExprs)
b.attrs.inheritFromExprs = std::make_unique<std::vector<std::unique_ptr<Expr>>>();
b.attrs.inheritFromExprs->push_back(std::move(fromE));
b.attrs.inheritFromExprs = std::make_unique<std::vector<ref<Expr>>>();
auto fromExpr = ref<Expr>(std::move(s.from));
b.attrs.inheritFromExprs->push_back(fromExpr);
for (auto & [i, iPos] : s.attrs) {
if (attrs.find(i.symbol) != attrs.end())
ps.dupAttr(i.symbol, iPos, attrs[i.symbol].pos);
auto from = std::make_unique<ExprInheritFrom>(s.fromPos, b.attrs.inheritFromExprs->size() - 1);
auto inheritFrom = std::make_unique<ExprInheritFrom>(
s.fromPos,
b.attrs.inheritFromExprs->size() - 1,
fromExpr
);
attrs.emplace(
i.symbol,
ExprAttrs::AttrDef(
std::make_unique<ExprSelect>(iPos, std::move(from), i.symbol),
std::make_unique<ExprSelect>(iPos, std::move(inheritFrom), i.symbol),
iPos,
ExprAttrs::AttrDef::Kind::InheritedFrom));
}

2
src/libexpr/parser/state.hh
View file

@ -103,7 +103,7 @@ inline void State::addAttr(ExprAttrs * attrs, AttrPath && attrPath, std::unique_
auto * jAttrs = dynamic_cast<ExprAttrs *>(j->second.e.get());
if (jAttrs && ae) {
if (ae->inheritFromExprs && !jAttrs->inheritFromExprs)
jAttrs->inheritFromExprs = std::make_unique<std::vector<std::unique_ptr<Expr>>>();
jAttrs->inheritFromExprs = std::make_unique<std::vector<ref<Expr>>>();
for (auto & ad : ae->attrs) {
auto j2 = jAttrs->attrs.find(ad.first);
if (j2 != jAttrs->attrs.end()) // Attr already defined in iAttrs, error.