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Remove comparator.hh and switch to <=> in a bunch of places

Browse source 
Known behavior changes:

- `MemorySourceAccessor`'s comparison operators no longer forget to
  compare the `SourceAccessor` base class.

Progress on #10832

What remains for that issue is hopefully much easier!
This commit is contained in:
John Ericson 2024-05-16 18:46:38 -04:00
parent 2a95a2d780
commit bc83b9dc1f
49 changed files with 300 additions and 271 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

39
src/libcmd/built-path.cc
View file

@ -1,6 +1,7 @@
#include "built-path.hh"
#include "derivations.hh"
#include "store-api.hh"
#include "comparator.hh"
#include <nlohmann/json.hpp>
@ -8,30 +9,24 @@
namespace nix {
#define CMP_ONE(CHILD_TYPE, MY_TYPE, FIELD, COMPARATOR) \
bool MY_TYPE ::operator COMPARATOR (const MY_TYPE & other) const \
{ \
const MY_TYPE* me = this; \
auto fields1 = std::tie(*me->drvPath, me->FIELD); \
me = &other; \
auto fields2 = std::tie(*me->drvPath, me->FIELD); \
return fields1 COMPARATOR fields2; \
}
#define CMP(CHILD_TYPE, MY_TYPE, FIELD) \
CMP_ONE(CHILD_TYPE, MY_TYPE, FIELD, ==) \
CMP_ONE(CHILD_TYPE, MY_TYPE, FIELD, !=) \
CMP_ONE(CHILD_TYPE, MY_TYPE, FIELD, <)
// Custom implementation to avoid `ref` ptr equality
GENERATE_CMP_EXT(
,
std::strong_ordering,
SingleBuiltPathBuilt,
*me->drvPath,
me->output);
#define FIELD_TYPE std::pair<std::string, StorePath>
CMP(SingleBuiltPath, SingleBuiltPathBuilt, output)
#undef FIELD_TYPE
// Custom implementation to avoid `ref` ptr equality
#define FIELD_TYPE std::map<std::string, StorePath>
CMP(SingleBuiltPath, BuiltPathBuilt, outputs)
#undef FIELD_TYPE
#undef CMP
#undef CMP_ONE
// TODO no `GENERATE_CMP_EXT` because no `std::set::operator<=>` on
// Darwin, per header.
GENERATE_EQUAL(
,
BuiltPathBuilt ::,
BuiltPathBuilt,
*me->drvPath,
me->outputs);
StorePath SingleBuiltPath::outPath() const
{

16
src/libcmd/built-path.hh
View file

@ -18,7 +18,8 @@ struct SingleBuiltPathBuilt {
static SingleBuiltPathBuilt parse(const StoreDirConfig & store, std::string_view, std::string_view);
nlohmann::json toJSON(const StoreDirConfig & store) const;
DECLARE_CMP(SingleBuiltPathBuilt);
bool operator ==(const SingleBuiltPathBuilt &) const noexcept;
std::strong_ordering operator <=>(const SingleBuiltPathBuilt &) const noexcept;
};
using _SingleBuiltPathRaw = std::variant<
@ -33,6 +34,9 @@ struct SingleBuiltPath : _SingleBuiltPathRaw {
using Opaque = DerivedPathOpaque;
using Built = SingleBuiltPathBuilt;
bool operator == (const SingleBuiltPath &) const = default;
auto operator <=> (const SingleBuiltPath &) const = default;
inline const Raw & raw() const {
return static_cast<const Raw &>(*this);
}
@ -59,11 +63,13 @@ struct BuiltPathBuilt {
ref<SingleBuiltPath> drvPath;
std::map<std::string, StorePath> outputs;
bool operator == (const BuiltPathBuilt &) const noexcept;
// TODO libc++ 16 (used by darwin) missing `std::map::operator <=>`, can't do yet.
//std::strong_ordering operator <=> (const BuiltPathBuilt &) const noexcept;
std::string to_string(const StoreDirConfig & store) const;
static BuiltPathBuilt parse(const StoreDirConfig & store, std::string_view, std::string_view);
nlohmann::json toJSON(const StoreDirConfig & store) const;
DECLARE_CMP(BuiltPathBuilt);
};
using _BuiltPathRaw = std::variant<
@ -82,6 +88,10 @@ struct BuiltPath : _BuiltPathRaw {
using Opaque = DerivedPathOpaque;
using Built = BuiltPathBuilt;
bool operator == (const BuiltPath &) const = default;
// TODO libc++ 16 (used by darwin) missing `std::map::operator <=>`, can't do yet.
//auto operator <=> (const BuiltPath &) const = default;
inline const Raw & raw() const {
return static_cast<const Raw &>(*this);
}

2
src/libexpr-c/nix_api_external.cc
View file

@ -115,7 +115,7 @@ public:
/**
* Compare to another value of the same type.
*/
virtual bool operator==(const ExternalValueBase & b) const override
virtual bool operator==(const ExternalValueBase & b) const noexcept override
{
if (!desc.equal) {
return false;

4
src/libexpr/attr-set.hh
View file

@ -27,9 +27,9 @@ struct Attr
Attr(Symbol name, Value * value, PosIdx pos = noPos)
: name(name), pos(pos), value(value) { };
Attr() { };
bool operator < (const Attr & a) const
auto operator <=> (const Attr & a) const
{
return name < a.name;
return name <=> a.name;
}
};

2
src/libexpr/eval.cc
View file

@ -2842,7 +2842,7 @@ std::string ExternalValueBase::coerceToString(EvalState & state, const PosIdx &
}
bool ExternalValueBase::operator==(const ExternalValueBase & b) const
bool ExternalValueBase::operator==(const ExternalValueBase & b) const noexcept
{
return false;
}

9
src/libexpr/pos-idx.hh
View file

@ -28,20 +28,15 @@ public:
return id > 0;
}
bool operator<(const PosIdx other) const
auto operator<=>(const PosIdx other) const
{
return id < other.id;
return id <=> other.id;
}
bool operator==(const PosIdx other) const
{
return id == other.id;
}
bool operator!=(const PosIdx other) const
{
return id != other.id;
}
};
inline PosIdx noPos = {};

3
src/libexpr/symbol-table.hh
View file

@ -62,9 +62,8 @@ public:
explicit operator bool() const { return id > 0; }
bool operator<(const Symbol other) const { return id < other.id; }
auto operator<=>(const Symbol other) const { return id <=> other.id; }
bool operator==(const Symbol other) const { return id == other.id; }
bool operator!=(const Symbol other) const { return id != other.id; }
};
/**

2
src/libexpr/value.hh
View file

@ -111,7 +111,7 @@ class ExternalValueBase
* Compare to another value of the same type. Defaults to uncomparable,
* i.e. always false.
*/
virtual bool operator ==(const ExternalValueBase & b) const;
virtual bool operator ==(const ExternalValueBase & b) const noexcept;
/**
* Print the value as JSON. Defaults to unconvertable, i.e. throws an error

2
src/libfetchers/fetchers.cc
View file

@ -150,7 +150,7 @@ Attrs Input::toAttrs() const
return attrs;
}
bool Input::operator ==(const Input & other) const
bool Input::operator ==(const Input & other) const noexcept
{
return attrs == other.attrs;
}

2
src/libfetchers/fetchers.hh
View file

@ -89,7 +89,7 @@ public:
*/
bool isLocked() const;
bool operator ==(const Input & other) const;
bool operator ==(const Input & other) const noexcept;
bool contains(const Input & other) const;

5
src/libflake/flake/flakeref.cc
View file

@ -36,11 +36,6 @@ std::ostream & operator << (std::ostream & str, const FlakeRef & flakeRef)
return str;
}
bool FlakeRef::operator ==(const FlakeRef & other) const
{
return input == other.input && subdir == other.subdir;
}
FlakeRef FlakeRef::resolve(ref<Store> store) const
{
auto [input2, extraAttrs] = lookupInRegistries(store, input);

2
src/libflake/flake/flakeref.hh
View file

@ -46,7 +46,7 @@ struct FlakeRef
*/
Path subdir;
bool operator==(const FlakeRef & other) const;
bool operator ==(const FlakeRef & other) const = default;
FlakeRef(fetchers::Input && input, const Path & subdir)
: input(std::move(input)), subdir(subdir)

5
src/libflake/flake/lockfile.cc
View file

@ -249,11 +249,6 @@ bool LockFile::operator ==(const LockFile & other) const
return toJSON().first == other.toJSON().first;
}
bool LockFile::operator !=(const LockFile & other) const
{
return !(*this == other);
}
InputPath parseInputPath(std::string_view s)
{
InputPath path;

3
src/libflake/flake/lockfile.hh
View file

@ -74,9 +74,6 @@ struct LockFile
std::optional<FlakeRef> isUnlocked() const;
bool operator ==(const LockFile & other) const;
// Needed for old gcc versions that don't synthesize it (like gcc 8.2.2
// that is still the default on aarch64-linux)
bool operator !=(const LockFile & other) const;
std::shared_ptr<Node> findInput(const InputPath & path);

14
src/libstore/build-result.cc
View file

@ -2,17 +2,7 @@
namespace nix {
GENERATE_CMP_EXT(
,
BuildResult,
me->status,
me->errorMsg,
me->timesBuilt,
me->isNonDeterministic,
me->builtOutputs,
me->startTime,
me->stopTime,
me->cpuUser,
me->cpuSystem);
bool BuildResult::operator==(const BuildResult &) const noexcept = default;
std::strong_ordering BuildResult::operator<=>(const BuildResult &) const noexcept = default;
}

4
src/libstore/build-result.hh
View file

@ -3,7 +3,6 @@
#include "realisation.hh"
#include "derived-path.hh"
#include "comparator.hh"
#include <string>
#include <chrono>
@ -101,7 +100,8 @@ struct BuildResult
*/
std::optional<std::chrono::microseconds> cpuUser, cpuSystem;
DECLARE_CMP(BuildResult);
bool operator ==(const BuildResult &) const noexcept;
std::strong_ordering operator <=>(const BuildResult &) const noexcept;
bool success()
{

18
src/libstore/content-address.hh
View file

@ -73,6 +73,7 @@ struct ContentAddressMethod
Raw raw;
bool operator ==(const ContentAddressMethod &) const = default;
auto operator <=>(const ContentAddressMethod &) const = default;
MAKE_WRAPPER_CONSTRUCTOR(ContentAddressMethod);
@ -159,6 +160,7 @@ struct ContentAddress
*/
Hash hash;
bool operator ==(const ContentAddress &) const = default;
auto operator <=>(const ContentAddress &) const = default;
/**
@ -217,6 +219,10 @@ struct StoreReferences
* iff self is true.
*/
size_t size() const;
bool operator ==(const StoreReferences &) const = default;
// TODO libc++ 16 (used by darwin) missing `std::map::operator <=>`, can't do yet.
//auto operator <=>(const StoreReferences &) const = default;
};
// This matches the additional info that we need for makeTextPath
@ -232,6 +238,10 @@ struct TextInfo
* disallowed
*/
StorePathSet references;
bool operator ==(const TextInfo &) const = default;
// TODO libc++ 16 (used by darwin) missing `std::map::operator <=>`, can't do yet.
//auto operator <=>(const TextInfo &) const = default;
};
struct FixedOutputInfo
@ -250,6 +260,10 @@ struct FixedOutputInfo
* References to other store objects or this one.
*/
StoreReferences references;
bool operator ==(const FixedOutputInfo &) const = default;
// TODO libc++ 16 (used by darwin) missing `std::map::operator <=>`, can't do yet.
//auto operator <=>(const FixedOutputInfo &) const = default;
};
/**
@ -266,6 +280,10 @@ struct ContentAddressWithReferences
Raw raw;
bool operator ==(const ContentAddressWithReferences &) const = default;
// TODO libc++ 16 (used by darwin) missing `std::map::operator <=>`, can't do yet.
//auto operator <=>(const ContentAddressWithReferences &) const = default;
MAKE_WRAPPER_CONSTRUCTOR(ContentAddressWithReferences);
/**

48
src/libstore/derivations.hh
View file

@ -8,7 +8,6 @@
#include "repair-flag.hh"
#include "derived-path-map.hh"
#include "sync.hh"
#include "comparator.hh"
#include "variant-wrapper.hh"
#include <map>
@ -32,7 +31,8 @@ struct DerivationOutput
{
StorePath path;
GENERATE_CMP(InputAddressed, me->path);
bool operator == (const InputAddressed &) const = default;
auto operator <=> (const InputAddressed &) const = default;
};
/**
@ -56,7 +56,8 @@ struct DerivationOutput
*/
StorePath path(const StoreDirConfig & store, std::string_view drvName, OutputNameView outputName) const;
GENERATE_CMP(CAFixed, me->ca);
bool operator == (const CAFixed &) const = default;
auto operator <=> (const CAFixed &) const = default;
};
/**
@ -76,7 +77,8 @@ struct DerivationOutput
*/
HashAlgorithm hashAlgo;
GENERATE_CMP(CAFloating, me->method, me->hashAlgo);
bool operator == (const CAFloating &) const = default;
auto operator <=> (const CAFloating &) const = default;
};
/**
@ -84,7 +86,8 @@ struct DerivationOutput
* isn't known yet.
*/
struct Deferred {
GENERATE_CMP(Deferred);
bool operator == (const Deferred &) const = default;
auto operator <=> (const Deferred &) const = default;
};
/**
@ -103,7 +106,8 @@ struct DerivationOutput
*/
HashAlgorithm hashAlgo;
GENERATE_CMP(Impure, me->method, me->hashAlgo);
bool operator == (const Impure &) const = default;
auto operator <=> (const Impure &) const = default;
};
typedef std::variant<
@ -116,7 +120,8 @@ struct DerivationOutput
Raw raw;
GENERATE_CMP(DerivationOutput, me->raw);
bool operator == (const DerivationOutput &) const = default;
auto operator <=> (const DerivationOutput &) const = default;
MAKE_WRAPPER_CONSTRUCTOR(DerivationOutput);
@ -177,7 +182,8 @@ struct DerivationType {
*/
bool deferred;
GENERATE_CMP(InputAddressed, me->deferred);
bool operator == (const InputAddressed &) const = default;
auto operator <=> (const InputAddressed &) const = default;
};
/**
@ -201,7 +207,8 @@ struct DerivationType {
*/
bool fixed;
GENERATE_CMP(ContentAddressed, me->sandboxed, me->fixed);
bool operator == (const ContentAddressed &) const = default;
auto operator <=> (const ContentAddressed &) const = default;
};
/**
@ -211,7 +218,8 @@ struct DerivationType {
* type, but has some restrictions on its usage.
*/
struct Impure {
GENERATE_CMP(Impure);
bool operator == (const Impure &) const = default;
auto operator <=> (const Impure &) const = default;
};
typedef std::variant<
@ -222,7 +230,8 @@ struct DerivationType {
Raw raw;
GENERATE_CMP(DerivationType, me->raw);
bool operator == (const DerivationType &) const = default;
auto operator <=> (const DerivationType &) const = default;
MAKE_WRAPPER_CONSTRUCTOR(DerivationType);
@ -312,14 +321,9 @@ struct BasicDerivation
static std::string_view nameFromPath(const StorePath & storePath);
GENERATE_CMP(BasicDerivation,
me->outputs,
me->inputSrcs,
me->platform,
me->builder,
me->args,
me->env,
me->name);
bool operator == (const BasicDerivation &) const = default;
// TODO libc++ 16 (used by darwin) missing `std::map::operator <=>`, can't do yet.
//auto operator <=> (const BasicDerivation &) const = default;
};
class Store;
@ -377,9 +381,9 @@ struct Derivation : BasicDerivation
const nlohmann::json & json,
const ExperimentalFeatureSettings & xpSettings = experimentalFeatureSettings);
GENERATE_CMP(Derivation,
static_cast<const BasicDerivation &>(*me),
me->inputDrvs);
bool operator == (const Derivation &) const = default;
// TODO libc++ 16 (used by darwin) missing `std::map::operator <=>`, can't do yet.
//auto operator <=> (const Derivation &) const = default;
};

19
src/libstore/derived-path-map.cc
View file

@ -54,17 +54,18 @@ typename DerivedPathMap<V>::ChildNode * DerivedPathMap<V>::findSlot(const Single
namespace nix {
GENERATE_CMP_EXT(
template<>,
DerivedPathMap<std::set<std::string>>::ChildNode,
me->value,
me->childMap);
template<>
bool DerivedPathMap<std::set<std::string>>::ChildNode::operator == (
const DerivedPathMap<std::set<std::string>>::ChildNode &) const noexcept = default;
GENERATE_CMP_EXT(
template<>,
DerivedPathMap<std::set<std::string>>,
me->map);
// TODO libc++ 16 (used by darwin) missing `std::map::operator <=>`, can't do yet.
#if 0
template<>
std::strong_ordering DerivedPathMap<std::set<std::string>>::ChildNode::operator <=> (
const DerivedPathMap<std::set<std::string>>::ChildNode &) const noexcept = default;
#endif
template struct DerivedPathMap<std::set<std::string>>::ChildNode;
template struct DerivedPathMap<std::set<std::string>>;
};

34
src/libstore/derived-path-map.hh
View file

@ -47,7 +47,11 @@ struct DerivedPathMap {
*/
Map childMap;
DECLARE_CMP(ChildNode);
bool operator == (const ChildNode &) const noexcept;
// TODO libc++ 16 (used by darwin) missing `std::map::operator <=>`, can't do yet.
// decltype(std::declval<V>() <=> std::declval<V>())
// operator <=> (const ChildNode &) const noexcept;
};
/**
@ -60,7 +64,10 @@ struct DerivedPathMap {
*/
Map map;
DECLARE_CMP(DerivedPathMap);
bool operator == (const DerivedPathMap &) const = default;
// TODO libc++ 16 (used by darwin) missing `std::map::operator <=>`, can't do yet.
// auto operator <=> (const DerivedPathMap &) const noexcept;
/**
* Find the node for `k`, creating it if needed.
@ -83,14 +90,21 @@ struct DerivedPathMap {
ChildNode * findSlot(const SingleDerivedPath & k);
};
template<>
bool DerivedPathMap<std::set<std::string>>::ChildNode::operator == (
const DerivedPathMap<std::set<std::string>>::ChildNode &) const noexcept;
DECLARE_CMP_EXT(
template<>,
DerivedPathMap<std::set<std::string>>::,
DerivedPathMap<std::set<std::string>>);
DECLARE_CMP_EXT(
template<>,
DerivedPathMap<std::set<std::string>>::ChildNode::,
DerivedPathMap<std::set<std::string>>::ChildNode);
// TODO libc++ 16 (used by darwin) missing `std::map::operator <=>`, can't do yet.
#if 0
template<>
std::strong_ordering DerivedPathMap<std::set<std::string>>::ChildNode::operator <=> (
const DerivedPathMap<std::set<std::string>>::ChildNode &) const noexcept;
template<>
inline auto DerivedPathMap<std::set<std::string>>::operator <=> (const DerivedPathMap<std::set<std::string>> &) const noexcept = default;
#endif
extern template struct DerivedPathMap<std::set<std::string>>::ChildNode;
extern template struct DerivedPathMap<std::set<std::string>>;
}

43
src/libstore/derived-path.cc
View file

@ -1,6 +1,7 @@
#include "derived-path.hh"
#include "derivations.hh"
#include "store-api.hh"
#include "comparator.hh"
#include <nlohmann/json.hpp>
@ -8,26 +9,32 @@
namespace nix {
#define CMP_ONE(CHILD_TYPE, MY_TYPE, FIELD, COMPARATOR) \
bool MY_TYPE ::operator COMPARATOR (const MY_TYPE & other) const \
{ \
const MY_TYPE* me = this; \
auto fields1 = std::tie(*me->drvPath, me->FIELD); \
me = &other; \
auto fields2 = std::tie(*me->drvPath, me->FIELD); \
return fields1 COMPARATOR fields2; \
}
#define CMP(CHILD_TYPE, MY_TYPE, FIELD) \
CMP_ONE(CHILD_TYPE, MY_TYPE, FIELD, ==) \
CMP_ONE(CHILD_TYPE, MY_TYPE, FIELD, !=) \
CMP_ONE(CHILD_TYPE, MY_TYPE, FIELD, <)
// Custom implementation to avoid `ref` ptr equality
GENERATE_CMP_EXT(
,
std::strong_ordering,
SingleDerivedPathBuilt,
*me->drvPath,
me->output);
CMP(SingleDerivedPath, SingleDerivedPathBuilt, output)
// Custom implementation to avoid `ref` ptr equality
CMP(SingleDerivedPath, DerivedPathBuilt, outputs)
#undef CMP
#undef CMP_ONE
// TODO no `GENERATE_CMP_EXT` because no `std::set::operator<=>` on
// Darwin, per header.
GENERATE_EQUAL(
,
DerivedPathBuilt ::,
DerivedPathBuilt,
*me->drvPath,
me->outputs);
GENERATE_ONE_CMP(
,
bool,
DerivedPathBuilt ::,
<,
DerivedPathBuilt,
*me->drvPath,
me->outputs);
nlohmann::json DerivedPath::Opaque::toJSON(const StoreDirConfig & store) const
{

18
src/libstore/derived-path.hh
View file

@ -3,7 +3,6 @@
#include "path.hh"
#include "outputs-spec.hh"
#include "comparator.hh"
#include "config.hh"
#include "ref.hh"
@ -32,7 +31,8 @@ struct DerivedPathOpaque {
static DerivedPathOpaque parse(const StoreDirConfig & store, std::string_view);
nlohmann::json toJSON(const StoreDirConfig & store) const;
GENERATE_CMP(DerivedPathOpaque, me->path);
bool operator == (const DerivedPathOpaque &) const = default;
auto operator <=> (const DerivedPathOpaque &) const = default;
};
struct SingleDerivedPath;
@ -79,7 +79,8 @@ struct SingleDerivedPathBuilt {
const ExperimentalFeatureSettings & xpSettings = experimentalFeatureSettings);
nlohmann::json toJSON(Store & store) const;
DECLARE_CMP(SingleDerivedPathBuilt);
bool operator == (const SingleDerivedPathBuilt &) const noexcept;
std::strong_ordering operator <=> (const SingleDerivedPathBuilt &) const noexcept;
};
using _SingleDerivedPathRaw = std::variant<
@ -109,6 +110,9 @@ struct SingleDerivedPath : _SingleDerivedPathRaw {
return static_cast<const Raw &>(*this);
}
bool operator == (const SingleDerivedPath &) const = default;
auto operator <=> (const SingleDerivedPath &) const = default;
/**
* Get the store path this is ultimately derived from (by realising
* and projecting outputs).
@ -202,7 +206,9 @@ struct DerivedPathBuilt {
const ExperimentalFeatureSettings & xpSettings = experimentalFeatureSettings);
nlohmann::json toJSON(Store & store) const;
DECLARE_CMP(DerivedPathBuilt);
bool operator == (const DerivedPathBuilt &) const noexcept;
// TODO libc++ 16 (used by darwin) missing `std::set::operator <=>`, can't do yet.
bool operator < (const DerivedPathBuilt &) const noexcept;
};
using _DerivedPathRaw = std::variant<
@ -231,6 +237,10 @@ struct DerivedPath : _DerivedPathRaw {
return static_cast<const Raw &>(*this);
}
bool operator == (const DerivedPath &) const = default;
// TODO libc++ 16 (used by darwin) missing `std::set::operator <=>`, can't do yet.
//auto operator <=> (const DerivedPath &) const = default;
/**
* Get the store path this is ultimately derived from (by realising
* and projecting outputs).

9
src/libstore/nar-info.cc
View file

@ -4,15 +4,6 @@
namespace nix {
GENERATE_CMP_EXT(
,
NarInfo,
me->url,
me->compression,
me->fileHash,
me->fileSize,
static_cast<const ValidPathInfo &>(*me));
NarInfo::NarInfo(const Store & store, const std::string & s, const std::string & whence)
: ValidPathInfo(StorePath(StorePath::dummy), Hash(Hash::dummy)) // FIXME: hack
{

4
src/libstore/nar-info.hh
View file

@ -24,7 +24,9 @@ struct NarInfo : ValidPathInfo
NarInfo(const ValidPathInfo & info) : ValidPathInfo(info) { }
NarInfo(const Store & store, const std::string & s, const std::string & whence);
DECLARE_CMP(NarInfo);
bool operator ==(const NarInfo &) const = default;
// TODO libc++ 16 (used by darwin) missing `std::optional::operator <=>`, can't do yet
//auto operator <=>(const NarInfo &) const = default;
std::string to_string(const Store & store) const;

12
src/libstore/outputs-spec.hh
View file

@ -6,9 +6,7 @@
#include <set>
#include <variant>
#include "comparator.hh"
#include "json-impls.hh"
#include "comparator.hh"
#include "variant-wrapper.hh"
namespace nix {
@ -60,7 +58,11 @@ struct OutputsSpec {
Raw raw;
GENERATE_CMP(OutputsSpec, me->raw);
bool operator == (const OutputsSpec &) const = default;
// TODO libc++ 16 (used by darwin) missing `std::set::operator <=>`, can't do yet.
bool operator < (const OutputsSpec & other) const {
return raw < other.raw;
}
MAKE_WRAPPER_CONSTRUCTOR(OutputsSpec);
@ -99,7 +101,9 @@ struct ExtendedOutputsSpec {
Raw raw;
GENERATE_CMP(ExtendedOutputsSpec, me->raw);
bool operator == (const ExtendedOutputsSpec &) const = default;
// TODO libc++ 16 (used by darwin) missing `std::set::operator <=>`, can't do yet.
bool operator < (const ExtendedOutputsSpec &) const;
MAKE_WRAPPER_CONSTRUCTOR(ExtendedOutputsSpec);

8
src/libstore/path-info.cc
View file

@ -3,11 +3,13 @@
#include "path-info.hh"
#include "store-api.hh"
#include "json-utils.hh"
#include "comparator.hh"
namespace nix {
GENERATE_CMP_EXT(
,
std::weak_ordering,
UnkeyedValidPathInfo,
me->deriver,
me->narHash,
@ -19,12 +21,6 @@ GENERATE_CMP_EXT(
me->sigs,
me->ca);
GENERATE_CMP_EXT(
,
ValidPathInfo,
me->path,
static_cast<const UnkeyedValidPathInfo &>(*me));
std::string ValidPathInfo::fingerprint(const Store & store) const
{
if (narSize == 0)

44
src/libstore/path-info.hh
View file

@ -32,17 +32,47 @@ struct SubstitutablePathInfo
using SubstitutablePathInfos = std::map<StorePath, SubstitutablePathInfo>;
/**
* Information about a store object.
*
* See `store/store-object` and `protocols/json/store-object-info` in
* the Nix manual
*/
struct UnkeyedValidPathInfo
{
/**
* Path to derivation that produced this store object, if known.
*/
std::optional<StorePath> deriver;
/**
* \todo document this
*/
Hash narHash;
/**
* Other store objects this store object referes to.
*/
StorePathSet references;
/**
* When this store object was registered in the store that contains
* it, if known.
*/
time_t registrationTime = 0;
uint64_t narSize = 0; // 0 = unknown
uint64_t id = 0; // internal use only
/**
* 0 = unknown
*/
uint64_t narSize = 0;
/**
* internal use only: SQL primary key for on-disk store objects with
* `LocalStore`.
*
* @todo Remove, layer violation
*/
uint64_t id = 0;
/**
* Whether the path is ultimately trusted, that is, it's a
@ -75,7 +105,12 @@ struct UnkeyedValidPathInfo
UnkeyedValidPathInfo(Hash narHash) : narHash(narHash) { };
DECLARE_CMP(UnkeyedValidPathInfo);
bool operator == (const UnkeyedValidPathInfo &) const noexcept;
/**
* @todo return `std::strong_ordering` once `id` is removed
*/
std::weak_ordering operator <=> (const UnkeyedValidPathInfo &) const noexcept;
virtual ~UnkeyedValidPathInfo() { }
@ -95,7 +130,8 @@ struct UnkeyedValidPathInfo
struct ValidPathInfo : UnkeyedValidPathInfo {
StorePath path;
DECLARE_CMP(ValidPathInfo);
bool operator == (const ValidPathInfo &) const = default;
auto operator <=> (const ValidPathInfo &) const = default;
/**
* Return a fingerprint of the store path to be used in binary

3
src/libutil/args.cc
View file

@ -57,8 +57,7 @@ void Completions::add(std::string completion, std::string description)
});
}
bool Completion::operator<(const Completion & other) const
{ return completion < other.completion || (completion == other.completion && description < other.description); }
auto Completion::operator<=>(const Completion & other) const noexcept = default;
std::string completionMarker = "___COMPLETE___";

2
src/libutil/args.hh
View file

@ -380,7 +380,7 @@ struct Completion {
std::string completion;
std::string description;
bool operator<(const Completion & other) const;
auto operator<=>(const Completion & other) const noexcept;
};
/**

7
src/libutil/canon-path.hh
View file

@ -169,7 +169,7 @@ public:
* a directory is always followed directly by its children. For
* instance, 'foo' < 'foo/bar' < 'foo!'.
*/
bool operator < (const CanonPath & x) const
auto operator <=> (const CanonPath & x) const
{
auto i = path.begin();
auto j = x.path.begin();
@ -178,10 +178,9 @@ public:
if (c_i == '/') c_i = 0;
auto c_j = *j;
if (c_j == '/') c_j = 0;
if (c_i < c_j) return true;
if (c_i > c_j) return false;
if (auto cmp = c_i <=> c_j; cmp != 0) return cmp;
}
return i == path.end() && j != x.path.end();
return (i != path.end()) <=> (j != x.path.end());
}
/**

57
src/libutil/comparator.hh
View file

@ -1,17 +1,8 @@
#pragma once
///@file
#define DECLARE_ONE_CMP(PRE, QUAL, COMPARATOR, MY_TYPE) \
PRE bool QUAL operator COMPARATOR(const MY_TYPE & other) const;
#define DECLARE_EQUAL(prefix, qualification, my_type) \
DECLARE_ONE_CMP(prefix, qualification, ==, my_type)
#define DECLARE_LEQ(prefix, qualification, my_type) \
DECLARE_ONE_CMP(prefix, qualification, <, my_type)
#define DECLARE_NEQ(prefix, qualification, my_type) \
DECLARE_ONE_CMP(prefix, qualification, !=, my_type)
#define GENERATE_ONE_CMP(PRE, QUAL, COMPARATOR, MY_TYPE, ...) \
PRE bool QUAL operator COMPARATOR(const MY_TYPE & other) const { \
#define GENERATE_ONE_CMP(PRE, RET, QUAL, COMPARATOR, MY_TYPE, ...) \
PRE RET QUAL operator COMPARATOR(const MY_TYPE & other) const noexcept { \
__VA_OPT__(const MY_TYPE * me = this;) \
auto fields1 = std::tie( __VA_ARGS__ ); \
__VA_OPT__(me = &other;) \
@ -19,30 +10,9 @@
return fields1 COMPARATOR fields2; \
}
#define GENERATE_EQUAL(prefix, qualification, my_type, args...) \
GENERATE_ONE_CMP(prefix, qualification, ==, my_type, args)
#define GENERATE_LEQ(prefix, qualification, my_type, args...) \
GENERATE_ONE_CMP(prefix, qualification, <, my_type, args)
#define GENERATE_NEQ(prefix, qualification, my_type, args...) \
GENERATE_ONE_CMP(prefix, qualification, !=, my_type, args)
/**
* Declare comparison methods without defining them.
*/
#define DECLARE_CMP(my_type) \
DECLARE_EQUAL(,,my_type) \
DECLARE_LEQ(,,my_type) \
DECLARE_NEQ(,,my_type)
/**
* @param prefix This is for something before each declaration like
* `template<classname Foo>`.
*
* @param my_type the type are defining operators for.
*/
#define DECLARE_CMP_EXT(prefix, qualification, my_type) \
DECLARE_EQUAL(prefix, qualification, my_type) \
DECLARE_LEQ(prefix, qualification, my_type) \
DECLARE_NEQ(prefix, qualification, my_type)
GENERATE_ONE_CMP(prefix, bool, qualification, ==, my_type, args)
#define GENERATE_SPACESHIP(prefix, ret, qualification, my_type, args...) \
GENERATE_ONE_CMP(prefix, ret, qualification, <=>, my_type, args)
/**
* Awful hacky generation of the comparison operators by doing a lexicographic
@ -55,15 +25,19 @@
* will generate comparison operators semantically equivalent to:
*
* ```
* bool operator<(const ClassName& other) {
* return field1 < other.field1 && field2 < other.field2 && ...;
* auto operator<=>(const ClassName& other) const noexcept {
* if (auto cmp = field1 <=> other.field1; cmp != 0)
* return cmp;
* if (auto cmp = field2 <=> other.field2; cmp != 0)
* return cmp;
* ...
* return 0;
* }
* ```
*/
#define GENERATE_CMP(args...) \
GENERATE_EQUAL(,,args) \
GENERATE_LEQ(,,args) \
GENERATE_NEQ(,,args)
GENERATE_SPACESHIP(,auto,,args)
/**
* @param prefix This is for something before each declaration like
@ -71,7 +45,6 @@
*
* @param my_type the type are defining operators for.
*/
#define GENERATE_CMP_EXT(prefix, my_type, args...) \
#define GENERATE_CMP_EXT(prefix, ret, my_type, args...) \
GENERATE_EQUAL(prefix, my_type ::, my_type, args) \
GENERATE_LEQ(prefix, my_type ::, my_type, args) \
GENERATE_NEQ(prefix, my_type ::, my_type, args)
GENERATE_SPACESHIP(prefix, ret, my_type ::, my_type, args)

17
src/libutil/error.cc
View file

@ -46,27 +46,22 @@ std::ostream & operator <<(std::ostream & os, const HintFmt & hf)
/**
* An arbitrarily defined value comparison for the purpose of using traces in the key of a sorted container.
*/
inline bool operator<(const Trace& lhs, const Trace& rhs)
inline std::strong_ordering operator<=>(const Trace& lhs, const Trace& rhs)
{
// `std::shared_ptr` does not have value semantics for its comparison
// functions, so we need to check for nulls and compare the dereferenced
// values here.
if (lhs.pos != rhs.pos) {
if (!lhs.pos)
return true;
if (!rhs.pos)
return false;
if (*lhs.pos != *rhs.pos)
return *lhs.pos < *rhs.pos;
if (auto cmp = bool{lhs.pos} <=> bool{rhs.pos}; cmp != 0)
return cmp;
if (auto cmp = *lhs.pos <=> *rhs.pos; cmp != 0)
return cmp;
}
// This formats a freshly formatted hint string and then throws it away, which
// shouldn't be much of a problem because it only runs when pos is equal, and this function is
// used for trace printing, which is infrequent.
return lhs.hint.str() < rhs.hint.str();
return lhs.hint.str() <=> rhs.hint.str();
}
inline bool operator> (const Trace& lhs, const Trace& rhs) { return rhs < lhs; }
inline bool operator<=(const Trace& lhs, const Trace& rhs) { return !(lhs > rhs); }
inline bool operator>=(const Trace& lhs, const Trace& rhs) { return !(lhs < rhs); }
// print lines of code to the ostream, indicating the error column.
void printCodeLines(std::ostream & out,

5
src/libutil/error.hh
View file

@ -75,10 +75,7 @@ struct Trace {
TracePrint print = TracePrint::Default;
};
inline bool operator<(const Trace& lhs, const Trace& rhs);
inline bool operator> (const Trace& lhs, const Trace& rhs);
inline bool operator<=(const Trace& lhs, const Trace& rhs);
inline bool operator>=(const Trace& lhs, const Trace& rhs);
inline std::strong_ordering operator<=>(const Trace& lhs, const Trace& rhs);
struct ErrorInfo {
Verbosity level;

1
src/libutil/experimental-features.hh
View file

@ -1,7 +1,6 @@
#pragma once
///@file
#include "comparator.hh"
#include "error.hh"
#include "json-utils.hh"
#include "types.hh"

3
src/libutil/git.hh
View file

@ -39,7 +39,8 @@ struct TreeEntry
Mode mode;
Hash hash;
GENERATE_CMP(TreeEntry, me->mode, me->hash);
bool operator ==(const TreeEntry &) const = default;
auto operator <=>(const TreeEntry &) const = default;
};
/**

4
src/libutil/hash.cc
View file

@ -41,7 +41,7 @@ Hash::Hash(HashAlgorithm algo) : algo(algo)
}
bool Hash::operator == (const Hash & h2) const
bool Hash::operator == (const Hash & h2) const noexcept
{
if (hashSize != h2.hashSize) return false;
for (unsigned int i = 0; i < hashSize; i++)
@ -50,7 +50,7 @@ bool Hash::operator == (const Hash & h2) const
}
std::strong_ordering Hash::operator <=> (const Hash & h) const
std::strong_ordering Hash::operator <=> (const Hash & h) const noexcept
{
if (auto cmp = hashSize <=> h.hashSize; cmp != 0) return cmp;
for (unsigned int i = 0; i < hashSize; i++) {

4
src/libutil/hash.hh
View file

@ -88,12 +88,12 @@ public:
/**
* Check whether two hashes are equal.
*/
bool operator == (const Hash & h2) const;
bool operator == (const Hash & h2) const noexcept;
/**
* Compare how two hashes are ordered.
*/
std::strong_ordering operator <=> (const Hash & h2) const;
std::strong_ordering operator <=> (const Hash & h2) const noexcept;
/**
* Returns the length of a base-16 representation of this hash.

34
src/libutil/memory-source-accessor.hh
View file

@ -15,11 +15,15 @@ struct MemorySourceAccessor : virtual SourceAccessor
* defining what a "file system object" is in Nix.
*/
struct File {
bool operator == (const File &) const noexcept;
std::strong_ordering operator <=> (const File &) const noexcept;
struct Regular {
bool executable = false;
std::string contents;
GENERATE_CMP(Regular, me->executable, me->contents);
bool operator == (const Regular &) const = default;
auto operator <=> (const Regular &) const = default;
};
struct Directory {
@ -27,13 +31,16 @@ struct MemorySourceAccessor : virtual SourceAccessor
std::map<Name, File, std::less<>> contents;
GENERATE_CMP(Directory, me->contents);
bool operator == (const Directory &) const noexcept;
// TODO libc++ 16 (used by darwin) missing `std::map::operator <=>`, can't do yet.
bool operator < (const Directory &) const noexcept;
};
struct Symlink {
std::string target;
GENERATE_CMP(Symlink, me->target);
bool operator == (const Symlink &) const = default;
auto operator <=> (const Symlink &) const = default;
};
using Raw = std::variant<Regular, Directory, Symlink>;
@ -41,14 +48,15 @@ struct MemorySourceAccessor : virtual SourceAccessor
MAKE_WRAPPER_CONSTRUCTOR(File);
GENERATE_CMP(File, me->raw);
Stat lstat() const;
};
File root { File::Directory {} };
GENERATE_CMP(MemorySourceAccessor, me->root);
bool operator == (const MemorySourceAccessor &) const noexcept = default;
bool operator < (const MemorySourceAccessor & other) const noexcept {
return root < other.root;
}
std::string readFile(const CanonPath & path) override;
bool pathExists(const CanonPath & path) override;
@ -72,6 +80,20 @@ struct MemorySourceAccessor : virtual SourceAccessor
SourcePath addFile(CanonPath path, std::string && contents);
};
inline bool MemorySourceAccessor::File::Directory::operator == (
const MemorySourceAccessor::File::Directory &) const noexcept = default;
inline bool MemorySourceAccessor::File::Directory::operator < (
const MemorySourceAccessor::File::Directory & other) const noexcept
{
return contents < other.contents;
}
inline bool MemorySourceAccessor::File::operator == (
const MemorySourceAccessor::File &) const noexcept = default;
inline std::strong_ordering MemorySourceAccessor::File::operator <=> (
const MemorySourceAccessor::File &) const noexcept = default;
/**
* Write to a `MemorySourceAccessor` at the given path
*/

6
src/libutil/position.cc
View file

@ -17,12 +17,6 @@ Pos::operator std::shared_ptr<Pos>() const
return std::make_shared<Pos>(&*this);
}
bool Pos::operator<(const Pos &rhs) const
{
return std::forward_as_tuple(line, column, origin)
< std::forward_as_tuple(rhs.line, rhs.column, rhs.origin);
}
std::optional<LinesOfCode> Pos::getCodeLines() const
{
if (line == 0)

19
src/libutil/position.hh
View file

@ -22,21 +22,17 @@ struct Pos
struct Stdin {
ref<std::string> source;
bool operator==(const Stdin & rhs) const
bool operator==(const Stdin & rhs) const noexcept
{ return *source == *rhs.source; }
bool operator!=(const Stdin & rhs) const
{ return *source != *rhs.source; }
bool operator<(const Stdin & rhs) const
{ return *source < *rhs.source; }
std::strong_ordering operator<=>(const Stdin & rhs) const noexcept
{ return *source <=> *rhs.source; }
};
struct String {
ref<std::string> source;
bool operator==(const String & rhs) const
bool operator==(const String & rhs) const noexcept
{ return *source == *rhs.source; }
bool operator!=(const String & rhs) const
{ return *source != *rhs.source; }
bool operator<(const String & rhs) const
{ return *source < *rhs.source; }
std::strong_ordering operator<=>(const String & rhs) const noexcept
{ return *source <=> *rhs.source; }
};
typedef std::variant<std::monostate, Stdin, String, SourcePath> Origin;
@ -65,8 +61,7 @@ struct Pos
std::optional<LinesOfCode> getCodeLines() const;
bool operator==(const Pos & rhs) const = default;
bool operator!=(const Pos & rhs) const = default;
bool operator<(const Pos & rhs) const;
auto operator<=>(const Pos & rhs) const = default;
struct LinesIterator {
using difference_type = size_t;

4
src/libutil/ref.hh
View file

@ -87,9 +87,9 @@ public:
return p != other.p;
}
bool operator < (const ref<T> & other) const
auto operator <=> (const ref<T> & other) const
{
return p < other.p;
return p <=> other.p;
}
private:

4
src/libutil/source-accessor.hh
View file

@ -152,9 +152,9 @@ struct SourceAccessor : std::enable_shared_from_this<SourceAccessor>
return number == x.number;
}
bool operator < (const SourceAccessor & x) const
auto operator <=> (const SourceAccessor & x) const
{
return number < x.number;
return number <=> x.number;
}
void setPathDisplay(std::string displayPrefix, std::string displaySuffix = "");

11
src/libutil/source-path.cc
View file

@ -47,19 +47,14 @@ SourcePath SourcePath::operator / (const CanonPath & x) const
SourcePath SourcePath::operator / (std::string_view c) const
{ return {accessor, path / c}; }
bool SourcePath::operator==(const SourcePath & x) const
bool SourcePath::operator==(const SourcePath & x) const noexcept
{
return std::tie(*accessor, path) == std::tie(*x.accessor, x.path);
}
bool SourcePath::operator!=(const SourcePath & x) const
std::strong_ordering SourcePath::operator<=>(const SourcePath & x) const noexcept
{
return std::tie(*accessor, path) != std::tie(*x.accessor, x.path);
}
bool SourcePath::operator<(const SourcePath & x) const
{
return std::tie(*accessor, path) < std::tie(*x.accessor, x.path);
return std::tie(*accessor, path) <=> std::tie(*x.accessor, x.path);
}
std::ostream & operator<<(std::ostream & str, const SourcePath & path)

5
src/libutil/source-path.hh
View file

@ -103,9 +103,8 @@ struct SourcePath
*/
SourcePath operator / (std::string_view c) const;
bool operator==(const SourcePath & x) const;
bool operator!=(const SourcePath & x) const;
bool operator<(const SourcePath & x) const;
bool operator==(const SourcePath & x) const noexcept;
std::strong_ordering operator<=>(const SourcePath & x) const noexcept;
/**
* Convenience wrapper around `SourceAccessor::resolveSymlinks()`.

4
src/libutil/suggestions.hh
View file

@ -1,7 +1,6 @@
#pragma once
///@file
#include "comparator.hh"
#include "types.hh"
#include <set>
@ -20,7 +19,8 @@ public:
std::string to_string() const;
GENERATE_CMP(Suggestion, me->distance, me->suggestion)
bool operator ==(const Suggestion &) const = default;
auto operator <=>(const Suggestion &) const = default;
};
class Suggestions {

2
src/libutil/url.cc
View file

@ -132,7 +132,7 @@ std::string ParsedURL::to_string() const
+ (fragment.empty() ? "" : "#" + percentEncode(fragment));
}
bool ParsedURL::operator ==(const ParsedURL & other) const
bool ParsedURL::operator ==(const ParsedURL & other) const noexcept
{
return
scheme == other.scheme

2
src/libutil/url.hh
View file

@ -18,7 +18,7 @@ struct ParsedURL
std::string to_string() const;
bool operator ==(const ParsedURL & other) const;
bool operator ==(const ParsedURL & other) const noexcept;
/**
* Remove `.` and `..` path elements.

4
src/nix/profile.cc
View file

@ -27,7 +27,9 @@ struct ProfileElementSource
std::string attrPath;
ExtendedOutputsSpec outputs;
bool operator < (const ProfileElementSource & other) const
// TODO libc++ 16 (used by darwin) missing `std::set::operator <=>`, can't do yet.
//auto operator <=> (const ProfileElementSource & other) const
auto operator < (const ProfileElementSource & other) const
{
return
std::tuple(originalRef.to_string(), attrPath, outputs) <

2
tests/unit/libutil/git.cc
View file

@ -229,7 +229,7 @@ TEST_F(GitTest, both_roundrip) {
mkSinkHook(CanonPath::root, root.hash, BlobMode::Regular);
ASSERT_EQ(*files, *files2);
ASSERT_EQ(files->root, files2->root);
}
TEST(GitLsRemote, parseSymrefLineWithReference) {