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Merge pull request #11123 from tweag/fix-non-det-parser-printing

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Fix non-deterministic inherit printing
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Robert Hensing 2024-07-20 19:12:48 +02:00 committed by GitHub
commit 56757e15cf
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1 changed files with 5 additions and 3 deletions
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8
src/libexpr/nixexpr.cc
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@ -82,7 +82,9 @@ void ExprAttrs::showBindings(const SymbolTable & symbols, std::ostream & str) co
return sa < sb;
});
std::vector<Symbol> inherits;
std::map<ExprInheritFrom *, std::vector<Symbol>> inheritsFrom;
// We can use the displacement as a proxy for the order in which the symbols were parsed.
// The assignment of displacements should be deterministic, so that showBindings is deterministic.
std::map<Displacement, std::vector<Symbol>> inheritsFrom;
for (auto & i : sorted) {
switch (i->second.kind) {
case AttrDef::Kind::Plain:
@ -93,7 +95,7 @@ void ExprAttrs::showBindings(const SymbolTable & symbols, std::ostream & str) co
case AttrDef::Kind::InheritedFrom: {
auto & select = dynamic_cast<ExprSelect &>(*i->second.e);
auto & from = dynamic_cast<ExprInheritFrom &>(*select.e);
inheritsFrom[&from].push_back(i->first);
inheritsFrom[from.displ].push_back(i->first);
break;
}
}
@ -105,7 +107,7 @@ void ExprAttrs::showBindings(const SymbolTable & symbols, std::ostream & str) co
}
for (const auto & [from, syms] : inheritsFrom) {
str << "inherit (";
(*inheritFromExprs)[from->displ]->show(symbols, str);
(*inheritFromExprs)[from]->show(symbols, str);
str << ")";
for (auto sym : syms) str << " " << symbols[sym];
str << "; ";