git.delta.rocks / jrsonnet / refs/commits / 655108633317

1use std::{collections::BTreeMap, marker::PhantomData, ops::Deref};23use jrsonnet_gcmodule::{Cc, Trace};4use jrsonnet_interner::{IBytes, IStr};5pub use jrsonnet_macros::Typed;6use jrsonnet_types::{ComplexValType, ValType};78use crate::{9	arr::{ArrValue, BytesArray},10	bail,11	function::{native::NativeDesc, FuncDesc, FuncVal},12	typed::CheckType,13	val::{IndexableVal, NumValue, StrValue, ThunkMapper},14	ObjValue, ObjValueBuilder, Result, ResultExt, Thunk, Val,15};1617#[derive(Trace)]18struct FromUntyped<K: Trace>(PhantomData<fn() -> K>);19impl<K> ThunkMapper<Val> for FromUntyped<K>20where21	K: Typed + Trace,22{23	type Output = K;2425	fn map(self, from: Val) -> Result<Self::Output> {26		K::from_untyped(from)27	}28}29impl<K: Trace> Default for FromUntyped<K> {30	fn default() -> Self {31		Self(PhantomData)32	}33}3435pub trait TypedObj: Typed {36	fn serialize(self, out: &mut ObjValueBuilder) -> Result<()>;37	fn parse(obj: &ObjValue) -> Result<Self>;38	fn into_object(self) -> Result<ObjValue> {39		let mut builder = ObjValueBuilder::new();40		self.serialize(&mut builder)?;41		Ok(builder.build())42	}43}4445pub trait Typed: Sized {46	const TYPE: &'static ComplexValType;47	fn into_untyped(typed: Self) -> Result<Val>;48	fn into_lazy_untyped(typed: Self) -> Thunk<Val> {49		Thunk::from(Self::into_untyped(typed))50	}51	fn from_untyped(untyped: Val) -> Result<Self>;52	fn from_lazy_untyped(lazy: Thunk<Val>) -> Result<Self> {53		Self::from_untyped(lazy.evaluate()?)54	}5556	// Whatever caller should use `into_lazy_untyped` instead of `into_untyped`57	fn provides_lazy() -> bool {58		false59	}6061	// Whatever caller should use `from_lazy_untyped` instead of `from_untyped` when possible62	fn wants_lazy() -> bool {63		false64	}6566	/// Hack to make builtins be able to return non-result values, and make macros able to convert those values to result67	/// This method returns identity in impl Typed for Result, and should not be overriden68	#[doc(hidden)]69	fn into_result(typed: Self) -> Result<Val> {70		let value = Self::into_untyped(typed)?;71		Ok(value)72	}73}7475impl<T> Typed for Thunk<T>76where77	T: Typed + Trace + Clone,78{79	const TYPE: &'static ComplexValType = &ComplexValType::Lazy(T::TYPE);8081	fn into_untyped(typed: Self) -> Result<Val> {82		T::into_untyped(typed.evaluate()?)83	}8485	fn from_untyped(untyped: Val) -> Result<Self> {86		Self::from_lazy_untyped(Thunk::evaluated(untyped))87	}8889	fn provides_lazy() -> bool {90		true91	}9293	fn into_lazy_untyped(inner: Self) -> Thunk<Val> {94		#[derive(Trace)]95		struct IntoUntyped<K: Trace>(PhantomData<fn() -> K>);96		impl<K> ThunkMapper<K> for IntoUntyped<K>97		where98			K: Typed + Trace,99		{100			type Output = Val;101102			fn map(self, from: K) -> Result<Self::Output> {103				K::into_untyped(from)104			}105		}106		impl<K: Trace> Default for IntoUntyped<K> {107			fn default() -> Self {108				Self(PhantomData)109			}110		}111		inner.map(<IntoUntyped<T>>::default())112	}113114	fn wants_lazy() -> bool {115		true116	}117118	fn from_lazy_untyped(inner: Thunk<Val>) -> Result<Self> {119		Ok(inner.map(<FromUntyped<T>>::default()))120	}121}122123pub const MAX_SAFE_INTEGER: f64 = ((1u64 << (f64::MANTISSA_DIGITS)) - 1) as f64;124pub const MIN_SAFE_INTEGER: f64 = (-((1i64 << (f64::MANTISSA_DIGITS)) - 1)) as f64;125126macro_rules! impl_int {127	($($ty:ty)*) => {$(128		impl Typed for $ty {129			const TYPE: &'static ComplexValType =130				&ComplexValType::BoundedNumber(Some(Self::MIN as f64), Some(Self::MAX as f64));131			fn from_untyped(value: Val) -> Result<Self> {132				<Self as Typed>::TYPE.check(&value)?;133				match value {134					Val::Num(n) => {135						let n = n.get();136						#[allow(clippy::float_cmp)]137						if n.trunc() != n {138							bail!(139								"cannot convert number with fractional part to {}",140								stringify!($ty)141							)142						}143						Ok(n as Self)144					}145					_ => unreachable!(),146				}147			}148			fn into_untyped(value: Self) -> Result<Val> {149				Ok(Val::Num(value.into()))150			}151		}152	)*};153}154155impl_int!(i8 u8 i16 u16 i32 u32);156157macro_rules! impl_bounded_int {158	($($name:ident = $ty:ty)*) => {$(159		#[derive(Clone, Copy)]160		pub struct $name<const MIN: $ty, const MAX: $ty>($ty);161		impl<const MIN: $ty, const MAX: $ty> $name<MIN, MAX> {162			pub const fn new(value: $ty) -> Option<$name<MIN, MAX>> {163				if value >= MIN && value <= MAX {164					Some(Self(value))165				} else {166					None167				}168			}169			pub const fn value(self) -> $ty {170				self.0171			}172		}173		impl<const MIN: $ty, const MAX: $ty> Deref for $name<MIN, MAX> {174			type Target = $ty;175			fn deref(&self) -> &Self::Target {176				&self.0177			}178		}179180		impl<const MIN: $ty, const MAX: $ty> Typed for $name<MIN, MAX> {181			const TYPE: &'static ComplexValType =182				&ComplexValType::BoundedNumber(183					Some(MIN as f64),184					Some(MAX as f64),185				);186187			fn from_untyped(value: Val) -> Result<Self> {188				<Self as Typed>::TYPE.check(&value)?;189				match value {190					Val::Num(n) => {191						let n = n.get();192						#[allow(clippy::float_cmp)]193						if n.trunc() != n {194							bail!(195								"cannot convert number with fractional part to {}",196								stringify!($ty)197							)198						}199						Ok(Self(n as $ty))200					}201					_ => unreachable!(),202				}203			}204205			#[allow(clippy::cast_lossless)]206			fn into_untyped(value: Self) -> Result<Val> {207				Ok(Val::try_num(value.0)?)208			}209		}210	)*};211}212213impl_bounded_int!(214	BoundedI8 = i8215	BoundedI16 = i16216	BoundedI32 = i32217	BoundedI64 = i64218	BoundedUsize = usize219);220221impl Typed for f64 {222	const TYPE: &'static ComplexValType = &ComplexValType::Simple(ValType::Num);223224	fn into_untyped(value: Self) -> Result<Val> {225		Ok(Val::try_num(value)?)226	}227228	fn from_untyped(value: Val) -> Result<Self> {229		<Self as Typed>::TYPE.check(&value)?;230		match value {231			Val::Num(n) => Ok(n.get()),232			_ => unreachable!(),233		}234	}235}236237pub struct PositiveF64(pub f64);238impl Typed for PositiveF64 {239	const TYPE: &'static ComplexValType = &ComplexValType::BoundedNumber(Some(0.0), None);240241	fn into_untyped(value: Self) -> Result<Val> {242		Ok(Val::try_num(value.0)?)243	}244245	fn from_untyped(value: Val) -> Result<Self> {246		<Self as Typed>::TYPE.check(&value)?;247		match value {248			Val::Num(n) => Ok(Self(n.get())),249			_ => unreachable!(),250		}251	}252}253impl Typed for usize {254	const TYPE: &'static ComplexValType =255		&ComplexValType::BoundedNumber(Some(0.0), Some(MAX_SAFE_INTEGER));256257	fn into_untyped(value: Self) -> Result<Val> {258		Ok(Val::try_num(value)?)259	}260261	fn from_untyped(value: Val) -> Result<Self> {262		<Self as Typed>::TYPE.check(&value)?;263		match value {264			Val::Num(n) => {265				let n = n.get();266				#[allow(clippy::float_cmp)]267				if n.trunc() != n {268					bail!("cannot convert number with fractional part to usize")269				}270				Ok(n as Self)271			}272			_ => unreachable!(),273		}274	}275}276277impl Typed for IStr {278	const TYPE: &'static ComplexValType = &ComplexValType::Simple(ValType::Str);279280	fn into_untyped(value: Self) -> Result<Val> {281		Ok(Val::string(value))282	}283284	fn from_untyped(value: Val) -> Result<Self> {285		<Self as Typed>::TYPE.check(&value)?;286		match value {287			Val::Str(s) => Ok(s.into_flat()),288			_ => unreachable!(),289		}290	}291}292293impl Typed for String {294	const TYPE: &'static ComplexValType = &ComplexValType::Simple(ValType::Str);295296	fn into_untyped(value: Self) -> Result<Val> {297		Ok(Val::string(value))298	}299300	fn from_untyped(value: Val) -> Result<Self> {301		<Self as Typed>::TYPE.check(&value)?;302		match value {303			Val::Str(s) => Ok(s.to_string()),304			_ => unreachable!(),305		}306	}307}308309impl Typed for StrValue {310	const TYPE: &'static ComplexValType = &ComplexValType::Simple(ValType::Str);311312	fn into_untyped(value: Self) -> Result<Val> {313		Ok(Val::Str(value))314	}315316	fn from_untyped(value: Val) -> Result<Self> {317		<Self as Typed>::TYPE.check(&value)?;318		match value {319			Val::Str(s) => Ok(s),320			_ => unreachable!(),321		}322	}323}324325impl Typed for char {326	const TYPE: &'static ComplexValType = &ComplexValType::Char;327328	fn into_untyped(value: Self) -> Result<Val> {329		Ok(Val::string(value))330	}331332	fn from_untyped(value: Val) -> Result<Self> {333		<Self as Typed>::TYPE.check(&value)?;334		match value {335			Val::Str(s) => Ok(s.into_flat().chars().next().unwrap()),336			_ => unreachable!(),337		}338	}339}340341impl<T> Typed for Vec<T>342where343	T: Typed,344{345	const TYPE: &'static ComplexValType = &ComplexValType::ArrayRef(T::TYPE);346347	fn into_untyped(value: Self) -> Result<Val> {348		Ok(Val::Arr(349			value350				.into_iter()351				.map(T::into_untyped)352				.collect::<Result<ArrValue>>()?,353		))354	}355356	fn from_untyped(value: Val) -> Result<Self> {357		let Val::Arr(a) = value else {358			<Self as Typed>::TYPE.check(&value)?;359			unreachable!("typecheck should fail")360		};361		a.iter()362			.enumerate()363			.map(|(i, r)| {364				r.and_then(|t| {365					T::from_untyped(t).with_description(|| format!("parsing elem <{i}>"))366				})367			})368			.collect::<Result<Self>>()369	}370}371372impl<K: Typed + Ord, V: Typed> Typed for BTreeMap<K, V> {373	const TYPE: &'static ComplexValType = &ComplexValType::AttrsOf(V::TYPE);374375	fn into_untyped(typed: Self) -> Result<Val> {376		let mut out = ObjValueBuilder::with_capacity(typed.len());377		for (k, v) in typed {378			let Some(key) = K::into_untyped(k)?.as_str() else {379				bail!("map key should serialize to string");380			};381			let value = V::into_untyped(v)?;382			out.field(key).value(value);383		}384		Ok(Val::Obj(out.build()))385	}386387	fn from_untyped(value: Val) -> Result<Self> {388		Self::TYPE.check(&value)?;389		let obj = value.as_obj().expect("typecheck should fail");390391		let mut out = Self::new();392		if V::wants_lazy() {393			for key in obj.fields_ex(394				false,395				#[cfg(feature = "exp-preserve-order")]396				false,397			) {398				let value = obj.get_lazy(key.clone()).expect("field exists");399				let value = V::from_lazy_untyped(value)?;400				let key = K::from_untyped(Val::Str(key.into()))?;401				let _ = out.insert(key, value);402			}403		} else {404			for (key, value) in obj.iter(405				#[cfg(feature = "exp-preserve-order")]406				false,407			) {408				let key = K::from_untyped(Val::Str(key.into()))?;409				let value = V::from_untyped(value?)?;410				let _ = out.insert(key, value);411			}412		}413		Ok(out)414	}415}416417impl Typed for Val {418	const TYPE: &'static ComplexValType = &ComplexValType::Any;419420	fn into_untyped(typed: Self) -> Result<Val> {421		Ok(typed)422	}423	fn from_untyped(untyped: Val) -> Result<Self> {424		Ok(untyped)425	}426}427428// Hack429#[doc(hidden)]430impl<T> Typed for Result<T>431where432	T: Typed,433{434	const TYPE: &'static ComplexValType = &ComplexValType::Any;435436	fn into_untyped(_typed: Self) -> Result<Val> {437		panic!("do not use this conversion")438	}439440	fn from_untyped(_untyped: Val) -> Result<Self> {441		panic!("do not use this conversion")442	}443444	fn into_result(typed: Self) -> Result<Val> {445		typed.map(T::into_untyped)?446	}447}448449/// Specialization450impl Typed for IBytes {451	const TYPE: &'static ComplexValType =452		&ComplexValType::ArrayRef(&ComplexValType::BoundedNumber(Some(0.0), Some(255.0)));453454	fn into_untyped(value: Self) -> Result<Val> {455		Ok(Val::Arr(ArrValue::bytes(value)))456	}457458	fn from_untyped(value: Val) -> Result<Self> {459		let Val::Arr(a) = &value else {460			<Self as Typed>::TYPE.check(&value)?;461			unreachable!()462		};463		if let Some(bytes) = a.as_any().downcast_ref::<BytesArray>() {464			return Ok(bytes.0.as_slice().into());465		};466		<Self as Typed>::TYPE.check(&value)?;467		// Any::downcast_ref::<ByteArray>(&a);468		let mut out = Vec::with_capacity(a.len());469		for e in a.iter() {470			let r = e?;471			out.push(u8::from_untyped(r)?);472		}473		Ok(out.as_slice().into())474	}475}476477pub struct M1;478impl Typed for M1 {479	const TYPE: &'static ComplexValType = &ComplexValType::BoundedNumber(Some(-1.0), Some(-1.0));480481	fn into_untyped(_: Self) -> Result<Val> {482		Ok(Val::Num(NumValue::new(-1.0).expect("finite")))483	}484485	fn from_untyped(value: Val) -> Result<Self> {486		<Self as Typed>::TYPE.check(&value)?;487		Ok(Self)488	}489}490491macro_rules! decl_either {492	($($name: ident, $($id: ident)*);*) => {$(493		#[derive(Clone)]494		pub enum $name<$($id),*> {495			$($id($id)),*496		}497		impl<$($id),*> Typed for $name<$($id),*>498		where499			$($id: Typed,)*500		{501			const TYPE: &'static ComplexValType = &ComplexValType::UnionRef(&[$($id::TYPE),*]);502503			fn into_untyped(value: Self) -> Result<Val> {504				match value {$(505					$name::$id(v) => $id::into_untyped(v)506				),*}507			}508509			fn from_untyped(value: Val) -> Result<Self> {510				$(511					if $id::TYPE.check(&value).is_ok() {512						$id::from_untyped(value).map(Self::$id)513					} else514				)* {515					<Self as Typed>::TYPE.check(&value)?;516					unreachable!()517				}518			}519		}520	)*}521}522decl_either!(523	Either1, A;524	Either2, A B;525	Either3, A B C;526	Either4, A B C D;527	Either5, A B C D E;528	Either6, A B C D E F;529	Either7, A B C D E F G530);531#[macro_export]532macro_rules! Either {533	($a:ty) => {$crate::typed::Either1<$a>};534	($a:ty, $b:ty) => {$crate::typed::Either2<$a, $b>};535	($a:ty, $b:ty, $c:ty) => {$crate::typed::Either3<$a, $b, $c>};536	($a:ty, $b:ty, $c:ty, $d:ty) => {$crate::typed::Either4<$a, $b, $c, $d>};537	($a:ty, $b:ty, $c:ty, $d:ty, $e:ty) => {$crate::typed::Either5<$a, $b, $c, $d, $e>};538	($a:ty, $b:ty, $c:ty, $d:ty, $e:ty, $f:ty) => {$crate::typed::Either6<$a, $b, $c, $d, $e, $f>};539	($a:ty, $b:ty, $c:ty, $d:ty, $e:ty, $f:ty, $g:ty) => {$crate::typed::Either7<$a, $b, $c, $d, $e, $f, $g>};540}541pub use Either;542543pub type MyType = Either![u32, f64, String];544545impl Typed for ArrValue {546	const TYPE: &'static ComplexValType = &ComplexValType::Simple(ValType::Arr);547548	fn into_untyped(value: Self) -> Result<Val> {549		Ok(Val::Arr(value))550	}551552	fn from_untyped(value: Val) -> Result<Self> {553		<Self as Typed>::TYPE.check(&value)?;554		match value {555			Val::Arr(a) => Ok(a),556			_ => unreachable!(),557		}558	}559}560561impl Typed for FuncVal {562	const TYPE: &'static ComplexValType = &ComplexValType::Simple(ValType::Func);563564	fn into_untyped(value: Self) -> Result<Val> {565		Ok(Val::Func(value))566	}567568	fn from_untyped(value: Val) -> Result<Self> {569		<Self as Typed>::TYPE.check(&value)?;570		match value {571			Val::Func(a) => Ok(a),572			_ => unreachable!(),573		}574	}575}576577impl Typed for Cc<FuncDesc> {578	const TYPE: &'static ComplexValType = &ComplexValType::Simple(ValType::Func);579580	fn into_untyped(value: Self) -> Result<Val> {581		Ok(Val::Func(FuncVal::Normal(value)))582	}583584	fn from_untyped(value: Val) -> Result<Self> {585		<Self as Typed>::TYPE.check(&value)?;586		match value {587			Val::Func(FuncVal::Normal(desc)) => Ok(desc),588			Val::Func(_) => bail!("expected normal function, not builtin"),589			_ => unreachable!(),590		}591	}592}593594impl Typed for ObjValue {595	const TYPE: &'static ComplexValType = &ComplexValType::Simple(ValType::Obj);596597	fn into_untyped(value: Self) -> Result<Val> {598		Ok(Val::Obj(value))599	}600601	fn from_untyped(value: Val) -> Result<Self> {602		<Self as Typed>::TYPE.check(&value)?;603		match value {604			Val::Obj(a) => Ok(a),605			_ => unreachable!(),606		}607	}608}609610impl Typed for bool {611	const TYPE: &'static ComplexValType = &ComplexValType::Simple(ValType::Bool);612613	fn into_untyped(value: Self) -> Result<Val> {614		Ok(Val::Bool(value))615	}616617	fn from_untyped(value: Val) -> Result<Self> {618		<Self as Typed>::TYPE.check(&value)?;619		match value {620			Val::Bool(a) => Ok(a),621			_ => unreachable!(),622		}623	}624}625impl Typed for IndexableVal {626	const TYPE: &'static ComplexValType = &ComplexValType::UnionRef(&[627		&ComplexValType::Simple(ValType::Arr),628		&ComplexValType::Simple(ValType::Str),629	]);630631	fn into_untyped(value: Self) -> Result<Val> {632		match value {633			Self::Str(s) => Ok(Val::string(s)),634			Self::Arr(a) => Ok(Val::Arr(a)),635		}636	}637638	fn from_untyped(value: Val) -> Result<Self> {639		<Self as Typed>::TYPE.check(&value)?;640		value.into_indexable()641	}642}643644pub struct Null;645impl Typed for Null {646	const TYPE: &'static ComplexValType = &ComplexValType::Simple(ValType::Null);647648	fn into_untyped(_: Self) -> Result<Val> {649		Ok(Val::Null)650	}651652	fn from_untyped(value: Val) -> Result<Self> {653		<Self as Typed>::TYPE.check(&value)?;654		Ok(Self)655	}656}657658impl<T> Typed for Option<T>659where660	T: Typed,661{662	const TYPE: &'static ComplexValType =663		&ComplexValType::UnionRef(&[&ComplexValType::Simple(ValType::Null), T::TYPE]);664665	fn into_untyped(typed: Self) -> Result<Val> {666		typed.map_or_else(|| Ok(Val::Null), |v| T::into_untyped(v))667	}668669	fn from_untyped(untyped: Val) -> Result<Self> {670		if matches!(untyped, Val::Null) {671			Ok(None)672		} else {673			T::from_untyped(untyped).map(Some)674		}675	}676}677678pub struct NativeFn<D: NativeDesc>(D::Value);679impl<D: NativeDesc> Deref for NativeFn<D> {680	type Target = D::Value;681682	fn deref(&self) -> &Self::Target {683		&self.0684	}685}686impl<D: NativeDesc> Typed for NativeFn<D> {687	const TYPE: &'static ComplexValType = &ComplexValType::Simple(ValType::Func);688689	fn into_untyped(_typed: Self) -> Result<Val> {690		bail!("can only convert functions from jsonnet to native")691	}692693	fn from_untyped(untyped: Val) -> Result<Self> {694		Ok(Self(695			untyped696				.as_func()697				.expect("shape is checked")698				.into_native::<D>(),699		))700	}701}702703impl Typed for NumValue {704	const TYPE: &'static ComplexValType = &ComplexValType::Simple(ValType::Num);705706	fn into_untyped(typed: Self) -> Result<Val> {707		Ok(Val::Num(typed))708	}709710	fn from_untyped(untyped: Val) -> Result<Self> {711		Self::TYPE.check(&untyped)?;712		match untyped {713			Val::Num(v) => Ok(v),714			_ => unreachable!(),715		}716	}717}