git.delta.rocks / jrsonnet / refs/commits / 69d179bf913a

1use crate::{2	builtin::manifest::{3		manifest_json_ex, manifest_yaml_ex, ManifestJsonOptions, ManifestType, ManifestYamlOptions,4	},5	cc_ptr_eq,6	error::{Error::*, LocError},7	evaluate,8	function::{9		parse_default_function_call, parse_function_call, ArgsLike, Builtin, CallLocation,10		StaticBuiltin,11	},12	gc::TraceBox,13	throw, Context, ObjValue, Result,14};15use gcmodule::{Cc, Trace};16use jrsonnet_interner::IStr;17use jrsonnet_parser::{LocExpr, ParamsDesc};18use jrsonnet_types::ValType;19use std::{cell::RefCell, fmt::Debug, rc::Rc};2021pub trait LazyValValue: Trace {22	fn get(self: Box<Self>) -> Result<Val>;23}2425#[derive(Trace)]26enum LazyValInternals {27	Computed(Val),28	Errored(LocError),29	Waiting(TraceBox<dyn LazyValValue>),30	Pending,31}3233#[derive(Clone, Trace)]34pub struct LazyVal(Cc<RefCell<LazyValInternals>>);35impl LazyVal {36	pub fn new(f: TraceBox<dyn LazyValValue>) -> Self {37		Self(Cc::new(RefCell::new(LazyValInternals::Waiting(f))))38	}39	pub fn new_resolved(val: Val) -> Self {40		Self(Cc::new(RefCell::new(LazyValInternals::Computed(val))))41	}42	pub fn force(&self) -> Result<()> {43		self.evaluate()?;44		Ok(())45	}46	pub fn evaluate(&self) -> Result<Val> {47		match &*self.0.borrow() {48			LazyValInternals::Computed(v) => return Ok(v.clone()),49			LazyValInternals::Errored(e) => return Err(e.clone()),50			LazyValInternals::Pending => return Err(RecursiveLazyValueEvaluation.into()),51			_ => (),52		};53		let value = if let LazyValInternals::Waiting(value) =54			std::mem::replace(&mut *self.0.borrow_mut(), LazyValInternals::Pending)55		{56			value57		} else {58			unreachable!()59		};60		let new_value = match value.0.get() {61			Ok(v) => v,62			Err(e) => {63				*self.0.borrow_mut() = LazyValInternals::Errored(e.clone());64				return Err(e);65			}66		};67		*self.0.borrow_mut() = LazyValInternals::Computed(new_value.clone());68		Ok(new_value)69	}70}7172impl Debug for LazyVal {73	fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {74		write!(f, "Lazy")75	}76}77impl PartialEq for LazyVal {78	fn eq(&self, other: &Self) -> bool {79		cc_ptr_eq(&self.0, &other.0)80	}81}8283#[derive(Debug, PartialEq, Trace)]84pub struct FuncDesc {85	pub name: IStr,86	pub ctx: Context,87	pub params: ParamsDesc,88	pub body: LocExpr,89}90impl FuncDesc {91	/// Create body context, but fill arguments without defaults with lazy error92	pub fn default_body_context(&self) -> Context {93		parse_default_function_call(self.ctx.clone(), &self.params)94	}9596	/// Create context, with which body code will run97	pub fn call_body_context(98		&self,99		call_ctx: Context,100		args: &dyn ArgsLike,101		tailstrict: bool,102	) -> Result<Context> {103		parse_function_call(call_ctx, self.ctx.clone(), &self.params, args, tailstrict)104	}105}106107#[derive(Trace, Clone)]108pub enum FuncVal {109	/// Plain function implemented in jsonnet110	Normal(Cc<FuncDesc>),111	/// Standard library function112	StaticBuiltin(#[skip_trace] &'static dyn StaticBuiltin),113	/// User-provided function114	Builtin(Cc<TraceBox<dyn Builtin>>),115}116117impl Debug for FuncVal {118	fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {119		match self {120			Self::Normal(arg0) => f.debug_tuple("Normal").field(arg0).finish(),121			Self::StaticBuiltin(arg0) => {122				f.debug_tuple("StaticBuiltin").field(&arg0.name()).finish()123			}124			Self::Builtin(arg0) => f.debug_tuple("Builtin").field(&arg0.name()).finish(),125		}126	}127}128129impl FuncVal {130	pub fn args_len(&self) -> usize {131		match self {132			Self::Normal(n) => n.params.iter().filter(|p| p.1.is_none()).count(),133			Self::StaticBuiltin(i) => i.params().iter().filter(|p| !p.has_default).count(),134			Self::Builtin(i) => i.params().iter().filter(|p| !p.has_default).count(),135		}136	}137	pub fn name(&self) -> IStr {138		match self {139			Self::Normal(normal) => normal.name.clone(),140			Self::StaticBuiltin(builtin) => builtin.name().into(),141			Self::Builtin(builtin) => builtin.name().into(),142		}143	}144	pub fn evaluate(145		&self,146		call_ctx: Context,147		loc: CallLocation,148		args: &dyn ArgsLike,149		tailstrict: bool,150	) -> Result<Val> {151		match self {152			Self::Normal(func) => {153				let body_ctx = func.call_body_context(call_ctx, args, tailstrict)?;154				evaluate(body_ctx, &func.body)155			}156			Self::StaticBuiltin(b) => b.call(call_ctx, loc, args),157			Self::Builtin(b) => b.call(call_ctx, loc, args),158		}159	}160	pub fn evaluate_simple(&self, args: &dyn ArgsLike) -> Result<Val> {161		self.evaluate(Context::default(), CallLocation::native(), args, true)162	}163}164165#[derive(Clone)]166pub enum ManifestFormat {167	YamlStream(Box<ManifestFormat>),168	Yaml(usize),169	Json(usize),170	ToString,171	String,172}173174#[derive(Debug, Clone, Trace)]175#[force_tracking]176pub enum ArrValue {177	Bytes(#[skip_trace] Rc<[u8]>),178	Lazy(Cc<Vec<LazyVal>>),179	Eager(Cc<Vec<Val>>),180	Extended(Box<(Self, Self)>),181}182impl ArrValue {183	pub fn new_eager() -> Self {184		Self::Eager(Cc::new(Vec::new()))185	}186187	pub fn len(&self) -> usize {188		match self {189			Self::Bytes(i) => i.len(),190			Self::Lazy(l) => l.len(),191			Self::Eager(e) => e.len(),192			Self::Extended(v) => v.0.len() + v.1.len(),193		}194	}195196	pub fn is_empty(&self) -> bool {197		self.len() == 0198	}199200	pub fn get(&self, index: usize) -> Result<Option<Val>> {201		match self {202			Self::Bytes(i) => i203				.get(index)204				.map_or(Ok(None), |v| Ok(Some(Val::Num(*v as f64)))),205			Self::Lazy(vec) => {206				if let Some(v) = vec.get(index) {207					Ok(Some(v.evaluate()?))208				} else {209					Ok(None)210				}211			}212			Self::Eager(vec) => Ok(vec.get(index).cloned()),213			Self::Extended(v) => {214				let a_len = v.0.len();215				if a_len > index {216					v.0.get(index)217				} else {218					v.1.get(index - a_len)219				}220			}221		}222	}223224	pub fn get_lazy(&self, index: usize) -> Option<LazyVal> {225		match self {226			Self::Bytes(i) => i227				.get(index)228				.map(|b| LazyVal::new_resolved(Val::Num(*b as f64))),229			Self::Lazy(vec) => vec.get(index).cloned(),230			Self::Eager(vec) => vec.get(index).cloned().map(LazyVal::new_resolved),231			Self::Extended(v) => {232				let a_len = v.0.len();233				if a_len > index {234					v.0.get_lazy(index)235				} else {236					v.1.get_lazy(index - a_len)237				}238			}239		}240	}241242	pub fn evaluated(&self) -> Result<Cc<Vec<Val>>> {243		Ok(match self {244			Self::Bytes(i) => {245				let mut out = Vec::with_capacity(i.len());246				for v in i.iter() {247					out.push(Val::Num(*v as f64));248				}249				Cc::new(out)250			}251			Self::Lazy(vec) => {252				let mut out = Vec::with_capacity(vec.len());253				for item in vec.iter() {254					out.push(item.evaluate()?);255				}256				Cc::new(out)257			}258			Self::Eager(vec) => vec.clone(),259			Self::Extended(_v) => {260				let mut out = Vec::with_capacity(self.len());261				for item in self.iter() {262					out.push(item?);263				}264				Cc::new(out)265			}266		})267	}268269	pub fn iter(&self) -> impl DoubleEndedIterator<Item = Result<Val>> + '_ {270		(0..self.len()).map(move |idx| match self {271			Self::Bytes(b) => Ok(Val::Num(b[idx] as f64)),272			Self::Lazy(l) => l[idx].evaluate(),273			Self::Eager(e) => Ok(e[idx].clone()),274			Self::Extended(_) => self.get(idx).map(|e| e.unwrap()),275		})276	}277278	pub fn iter_lazy(&self) -> impl DoubleEndedIterator<Item = LazyVal> + '_ {279		(0..self.len()).map(move |idx| match self {280			Self::Bytes(b) => LazyVal::new_resolved(Val::Num(b[idx] as f64)),281			Self::Lazy(l) => l[idx].clone(),282			Self::Eager(e) => LazyVal::new_resolved(e[idx].clone()),283			Self::Extended(_) => self.get_lazy(idx).unwrap(),284		})285	}286287	pub fn reversed(self) -> Self {288		match self {289			Self::Bytes(b) => {290				let mut out = b.to_vec();291				out.reverse();292				Self::Bytes(out.into())293			}294			Self::Lazy(vec) => {295				let mut out = (&vec as &Vec<_>).clone();296				out.reverse();297				Self::Lazy(Cc::new(out))298			}299			Self::Eager(vec) => {300				let mut out = (&vec as &Vec<_>).clone();301				out.reverse();302				Self::Eager(Cc::new(out))303			}304			Self::Extended(b) => Self::Extended(Box::new((b.1.reversed(), b.0.reversed()))),305		}306	}307308	pub fn map(self, mapper: impl Fn(Val) -> Result<Val>) -> Result<Self> {309		let mut out = Vec::with_capacity(self.len());310311		for value in self.iter() {312			out.push(mapper(value?)?);313		}314315		Ok(Self::Eager(Cc::new(out)))316	}317318	pub fn filter(self, filter: impl Fn(&Val) -> Result<bool>) -> Result<Self> {319		let mut out = Vec::with_capacity(self.len());320321		for value in self.iter() {322			let value = value?;323			if filter(&value)? {324				out.push(value);325			}326		}327328		Ok(Self::Eager(Cc::new(out)))329	}330331	pub fn ptr_eq(a: &Self, b: &Self) -> bool {332		match (a, b) {333			(Self::Lazy(a), Self::Lazy(b)) => cc_ptr_eq(a, b),334			(Self::Eager(a), Self::Eager(b)) => cc_ptr_eq(a, b),335			_ => false,336		}337	}338}339340impl From<Vec<LazyVal>> for ArrValue {341	fn from(v: Vec<LazyVal>) -> Self {342		Self::Lazy(Cc::new(v))343	}344}345346impl From<Vec<Val>> for ArrValue {347	fn from(v: Vec<Val>) -> Self {348		Self::Eager(Cc::new(v))349	}350}351352pub enum IndexableVal {353	Str(IStr),354	Arr(ArrValue),355}356357#[derive(Debug, Clone, Trace)]358pub enum Val {359	Bool(bool),360	Null,361	Str(IStr),362	Num(f64),363	Arr(ArrValue),364	Obj(ObjValue),365	Func(FuncVal),366}367368impl Val {369	pub const fn as_bool(&self) -> Option<bool> {370		match self {371			Val::Bool(v) => Some(*v),372			_ => None,373		}374	}375	pub const fn as_null(&self) -> Option<()> {376		match self {377			Val::Null => Some(()),378			_ => None,379		}380	}381	pub fn as_str(&self) -> Option<IStr> {382		match self {383			Val::Str(s) => Some(s.clone()),384			_ => None,385		}386	}387	pub const fn as_num(&self) -> Option<f64> {388		match self {389			Val::Num(n) => Some(*n),390			_ => None,391		}392	}393	pub fn as_arr(&self) -> Option<ArrValue> {394		match self {395			Val::Arr(a) => Some(a.clone()),396			_ => None,397		}398	}399	pub fn as_obj(&self) -> Option<ObjValue> {400		match self {401			Val::Obj(o) => Some(o.clone()),402			_ => None,403		}404	}405	pub fn as_func(&self) -> Option<FuncVal> {406		match self {407			Val::Func(f) => Some(f.clone()),408			_ => None,409		}410	}411412	/// Creates `Val::Num` after checking for numeric overflow.413	/// As numbers are `f64`, we can just check for their finity.414	pub fn new_checked_num(num: f64) -> Result<Self> {415		if num.is_finite() {416			Ok(Self::Num(num))417		} else {418			throw!(RuntimeError("overflow".into()))419		}420	}421422	pub fn try_cast_nullable_num(self, context: &'static str) -> Result<Option<f64>> {423		Ok(match self {424			Val::Null => None,425			Val::Num(num) => Some(num),426			_ => throw!(TypeMismatch(427				context,428				vec![ValType::Null, ValType::Num],429				self.value_type()430			)),431		})432	}433	pub const fn value_type(&self) -> ValType {434		match self {435			Self::Str(..) => ValType::Str,436			Self::Num(..) => ValType::Num,437			Self::Arr(..) => ValType::Arr,438			Self::Obj(..) => ValType::Obj,439			Self::Bool(_) => ValType::Bool,440			Self::Null => ValType::Null,441			Self::Func(..) => ValType::Func,442		}443	}444445	pub fn to_string(&self) -> Result<IStr> {446		Ok(match self {447			Self::Bool(true) => "true".into(),448			Self::Bool(false) => "false".into(),449			Self::Null => "null".into(),450			Self::Str(s) => s.clone(),451			v => manifest_json_ex(452				v,453				&ManifestJsonOptions {454					padding: "",455					mtype: ManifestType::ToString,456					newline: "\n",457					key_val_sep: ": ",458				},459			)?460			.into(),461		})462	}463464	/// Expects value to be object, outputs (key, manifested value) pairs465	pub fn manifest_multi(&self, ty: &ManifestFormat) -> Result<Vec<(IStr, IStr)>> {466		let obj = match self {467			Self::Obj(obj) => obj,468			_ => throw!(MultiManifestOutputIsNotAObject),469		};470		let keys = obj.fields();471		let mut out = Vec::with_capacity(keys.len());472		for key in keys {473			let value = obj474				.get(key.clone())?475				.expect("item in object")476				.manifest(ty)?;477			out.push((key, value));478		}479		Ok(out)480	}481482	/// Expects value to be array, outputs manifested values483	pub fn manifest_stream(&self, ty: &ManifestFormat) -> Result<Vec<IStr>> {484		let arr = match self {485			Self::Arr(a) => a,486			_ => throw!(StreamManifestOutputIsNotAArray),487		};488		let mut out = Vec::with_capacity(arr.len());489		for i in arr.iter() {490			out.push(i?.manifest(ty)?);491		}492		Ok(out)493	}494495	pub fn manifest(&self, ty: &ManifestFormat) -> Result<IStr> {496		Ok(match ty {497			ManifestFormat::YamlStream(format) => {498				let arr = match self {499					Self::Arr(a) => a,500					_ => throw!(StreamManifestOutputIsNotAArray),501				};502				let mut out = String::new();503504				match format as &ManifestFormat {505					ManifestFormat::YamlStream(_) => throw!(StreamManifestOutputCannotBeRecursed),506					ManifestFormat::String => throw!(StreamManifestCannotNestString),507					_ => {}508				};509510				if !arr.is_empty() {511					for v in arr.iter() {512						out.push_str("---\n");513						out.push_str(&v?.manifest(format)?);514						out.push('\n');515					}516					out.push_str("...");517				}518519				out.into()520			}521			ManifestFormat::Yaml(padding) => self.to_yaml(*padding)?,522			ManifestFormat::Json(padding) => self.to_json(*padding)?,523			ManifestFormat::ToString => self.to_string()?,524			ManifestFormat::String => match self {525				Self::Str(s) => s.clone(),526				_ => throw!(StringManifestOutputIsNotAString),527			},528		})529	}530531	/// For manifestification532	pub fn to_json(&self, padding: usize) -> Result<IStr> {533		manifest_json_ex(534			self,535			&ManifestJsonOptions {536				padding: &" ".repeat(padding),537				mtype: if padding == 0 {538					ManifestType::Minify539				} else {540					ManifestType::Manifest541				},542				newline: "\n",543				key_val_sep: ": ",544			},545		)546		.map(|s| s.into())547	}548549	/// Calls `std.manifestJson`550	pub fn to_std_json(&self, padding: usize) -> Result<Rc<str>> {551		manifest_json_ex(552			self,553			&ManifestJsonOptions {554				padding: &" ".repeat(padding),555				mtype: ManifestType::Std,556				newline: "\n",557				key_val_sep: ": ",558			},559		)560		.map(|s| s.into())561	}562563	pub fn to_yaml(&self, padding: usize) -> Result<IStr> {564		let padding = &" ".repeat(padding);565		manifest_yaml_ex(566			self,567			&ManifestYamlOptions {568				padding,569				arr_element_padding: padding,570				quote_keys: false,571			},572		)573		.map(|s| s.into())574	}575	pub fn into_indexable(self) -> Result<IndexableVal> {576		Ok(match self {577			Val::Str(s) => IndexableVal::Str(s),578			Val::Arr(arr) => IndexableVal::Arr(arr),579			_ => throw!(ValueIsNotIndexable(self.value_type())),580		})581	}582}583584const fn is_function_like(val: &Val) -> bool {585	matches!(val, Val::Func(_))586}587588/// Native implementation of `std.primitiveEquals`589pub fn primitive_equals(val_a: &Val, val_b: &Val) -> Result<bool> {590	Ok(match (val_a, val_b) {591		(Val::Bool(a), Val::Bool(b)) => a == b,592		(Val::Null, Val::Null) => true,593		(Val::Str(a), Val::Str(b)) => a == b,594		(Val::Num(a), Val::Num(b)) => (a - b).abs() <= f64::EPSILON,595		(Val::Arr(_), Val::Arr(_)) => throw!(RuntimeError(596			"primitiveEquals operates on primitive types, got array".into(),597		)),598		(Val::Obj(_), Val::Obj(_)) => throw!(RuntimeError(599			"primitiveEquals operates on primitive types, got object".into(),600		)),601		(a, b) if is_function_like(a) && is_function_like(b) => {602			throw!(RuntimeError("cannot test equality of functions".into()))603		}604		(_, _) => false,605	})606}607608/// Native implementation of `std.equals`609pub fn equals(val_a: &Val, val_b: &Val) -> Result<bool> {610	if val_a.value_type() != val_b.value_type() {611		return Ok(false);612	}613	match (val_a, val_b) {614		(Val::Arr(a), Val::Arr(b)) => {615			if ArrValue::ptr_eq(a, b) {616				return Ok(true);617			}618			if a.len() != b.len() {619				return Ok(false);620			}621			for (a, b) in a.iter().zip(b.iter()) {622				if !equals(&a?, &b?)? {623					return Ok(false);624				}625			}626			Ok(true)627		}628		(Val::Obj(a), Val::Obj(b)) => {629			if ObjValue::ptr_eq(a, b) {630				return Ok(true);631			}632			let fields = a.fields();633			if fields != b.fields() {634				return Ok(false);635			}636			for field in fields {637				if !equals(&a.get(field.clone())?.unwrap(), &b.get(field)?.unwrap())? {638					return Ok(false);639				}640			}641			Ok(true)642		}643		(a, b) => Ok(primitive_equals(a, b)?),644	}645}