git.delta.rocks / jrsonnet / refs/commits / 432b17211316

1use crate::{2	binding, context_creator, create_error, function_default, function_rhs, future_wrapper,3	lazy_val, push, Context, ContextCreator, FuncDesc, LazyBinding, LazyVal, ObjMember, ObjValue,4	Result, Val,5};6use closure::closure;7use jsonnet_parser::{8	ArgsDesc, AssertStmt, BinaryOpType, BindSpec, CompSpec, Expr, FieldMember, ForSpecData,9	IfSpecData, LiteralType, LocExpr, Member, ObjBody, ParamsDesc, UnaryOpType, Visibility,10};11use std::{12	collections::{BTreeMap, HashMap},13	rc::Rc,14};1516pub fn evaluate_binding(b: &BindSpec, context_creator: ContextCreator) -> (String, LazyBinding) {17	let b = b.clone();18	if let Some(args) = &b.params {19		let args = args.clone();20		(21			b.name.clone(),22			LazyBinding::Bindable(Rc::new(move |this, super_obj| {23				Ok(lazy_val!(24					closure!(clone b, clone args, clone context_creator, || Ok(evaluate_method(25						context_creator.0(this.clone(), super_obj.clone())?,26						&b.value,27						args.clone()28					)))29				))30			})),31		)32	} else {33		(34			b.name.clone(),35			LazyBinding::Bindable(Rc::new(move |this, super_obj| {36				Ok(lazy_val!(closure!(clone context_creator, clone b, ||37					push(b.value.clone(), "thunk".to_owned(), ||{38						evaluate(39							context_creator.0(this.clone(), super_obj.clone())?,40							&b.value41						)42					})43				)))44			})),45		)46	}47}4849pub fn evaluate_method(ctx: Context, expr: &LocExpr, arg_spec: ParamsDesc) -> Val {50	Val::Func(FuncDesc {51		ctx,52		params: arg_spec,53		eval_rhs: function_rhs!(closure!(clone expr, |ctx| evaluate(ctx, &expr))),54		eval_default: function_default!(closure!(|ctx, default| evaluate(ctx, &default))),55	})56}5758pub fn evaluate_field_name(59	context: Context,60	field_name: &jsonnet_parser::FieldName,61) -> Result<Option<String>> {62	Ok(match field_name {63		jsonnet_parser::FieldName::Fixed(n) => Some(n.clone()),64		jsonnet_parser::FieldName::Dyn(expr) => {65			let value = evaluate(context, expr)?.unwrap_if_lazy()?;66			if matches!(value, Val::Null) {67				None68			} else {69				Some(value.try_cast_str("dynamic field name")?)70			}71		}72	})73}7475pub fn evaluate_unary_op(op: UnaryOpType, b: &Val) -> Result<Val> {76	Ok(match (op, b) {77		(o, Val::Lazy(l)) => evaluate_unary_op(o, &l.evaluate()?)?,78		(UnaryOpType::Not, Val::Bool(v)) => Val::Bool(!v),79		(UnaryOpType::Minus, Val::Num(n)) => Val::Num(-*n),80		(UnaryOpType::BitNot, Val::Num(n)) => Val::Num(!(*n as i32) as f64),81		(op, o) => panic!("unary op not implemented: {:?} {:?}", op, o),82	})83}8485pub(crate) fn evaluate_add_op(a: &Val, b: &Val) -> Result<Val> {86	Ok(match (a, b) {87		(Val::Str(v1), Val::Str(v2)) => Val::Str(v1.to_owned() + &v2),8889		(Val::Str(v1), Val::Num(v2)) => Val::Str(format!("{}{}", v1, v2)),90		(Val::Num(v1), Val::Str(v2)) => Val::Str(format!("{}{}", v1, v2)),91		(Val::Str(v1), Val::Bool(v2)) => Val::Str(format!("{}{}", v1, v2)),92		(Val::Bool(v1), Val::Str(v2)) => Val::Str(format!("{}{}", v1, v2)),93		(Val::Str(v1), Val::Null) => Val::Str(format!("{}null", v1)),94		(Val::Null, Val::Str(v2)) => Val::Str(format!("null{}", v2)),9596		(Val::Obj(v1), Val::Obj(v2)) => Val::Obj(v2.with_super(v1.clone())),97		(Val::Arr(a), Val::Arr(b)) => Val::Arr([&a[..], &b[..]].concat()),98		(Val::Num(v1), Val::Num(v2)) => Val::Num(v1 + v2),99		_ => panic!("can't add: {:?} and {:?}", a, b),100	})101}102103pub fn evaluate_binary_op_special(104	context: Context,105	a: &LocExpr,106	op: BinaryOpType,107	b: &LocExpr,108) -> Result<Val> {109	Ok(110		match (evaluate(context.clone(), &a)?.unwrap_if_lazy()?, op, b) {111			(Val::Bool(true), BinaryOpType::Or, _o) => Val::Bool(true),112			(Val::Bool(false), BinaryOpType::And, _o) => Val::Bool(false),113			(a, op, eb) => {114				evaluate_binary_op_normal(&a, op, &evaluate(context, eb)?.unwrap_if_lazy()?)?115			}116		},117	)118}119120pub fn evaluate_binary_op_normal(a: &Val, op: BinaryOpType, b: &Val) -> Result<Val> {121	Ok(match (a, op, b) {122		(a, BinaryOpType::Add, b) => evaluate_add_op(a, b)?,123124		(Val::Str(v1), BinaryOpType::Mul, Val::Num(v2)) => Val::Str(v1.repeat(*v2 as usize)),125126		// Bool X Bool127		(Val::Bool(a), BinaryOpType::And, Val::Bool(b)) => Val::Bool(*a && *b),128		(Val::Bool(a), BinaryOpType::Or, Val::Bool(b)) => Val::Bool(*a || *b),129130		// Str X Str131		(Val::Str(v1), BinaryOpType::Lt, Val::Str(v2)) => Val::Bool(v1 < v2),132		(Val::Str(v1), BinaryOpType::Gt, Val::Str(v2)) => Val::Bool(v1 > v2),133		(Val::Str(v1), BinaryOpType::Lte, Val::Str(v2)) => Val::Bool(v1 <= v2),134		(Val::Str(v1), BinaryOpType::Gte, Val::Str(v2)) => Val::Bool(v1 >= v2),135136		// Num X Num137		(Val::Num(v1), BinaryOpType::Mul, Val::Num(v2)) => Val::Num(v1 * v2),138		(Val::Num(v1), BinaryOpType::Div, Val::Num(v2)) => Val::Num(v1 / v2),139140		(Val::Num(v1), BinaryOpType::Sub, Val::Num(v2)) => Val::Num(v1 - v2),141142		(Val::Num(v1), BinaryOpType::Lt, Val::Num(v2)) => Val::Bool(v1 < v2),143		(Val::Num(v1), BinaryOpType::Gt, Val::Num(v2)) => Val::Bool(v1 > v2),144		(Val::Num(v1), BinaryOpType::Lte, Val::Num(v2)) => Val::Bool(v1 <= v2),145		(Val::Num(v1), BinaryOpType::Gte, Val::Num(v2)) => Val::Bool(v1 >= v2),146147		(Val::Num(v1), BinaryOpType::BitAnd, Val::Num(v2)) => {148			Val::Num(((*v1 as i32) & (*v2 as i32)) as f64)149		}150		(Val::Num(v1), BinaryOpType::BitOr, Val::Num(v2)) => {151			Val::Num(((*v1 as i32) | (*v2 as i32)) as f64)152		}153		(Val::Num(v1), BinaryOpType::BitXor, Val::Num(v2)) => {154			Val::Num(((*v1 as i32) ^ (*v2 as i32)) as f64)155		}156		(Val::Num(v1), BinaryOpType::Lhs, Val::Num(v2)) => {157			Val::Num(((*v1 as i32) << (*v2 as i32)) as f64)158		}159		(Val::Num(v1), BinaryOpType::Rhs, Val::Num(v2)) => {160			Val::Num(((*v1 as i32) >> (*v2 as i32)) as f64)161		}162163		_ => panic!("no rules for binary operation: {:?} {:?} {:?}", a, op, b),164	})165}166167future_wrapper!(HashMap<String, LazyBinding>, FutureNewBindings);168future_wrapper!(ObjValue, FutureObjValue);169170pub fn evaluate_comp(171	context: Context,172	value: &LocExpr,173	specs: &[CompSpec],174) -> Result<Option<Vec<Val>>> {175	Ok(match specs.get(0) {176		None => Some(vec![evaluate(context, &value)?]),177		Some(CompSpec::IfSpec(IfSpecData(cond))) => {178			if evaluate(context.clone(), &cond)?.try_cast_bool("if spec")? {179				evaluate_comp(context, value, &specs[1..])?180			} else {181				None182			}183		}184		Some(CompSpec::ForSpec(ForSpecData(var, expr))) => {185			match evaluate(context.clone(), &expr)?.unwrap_if_lazy()? {186				Val::Arr(list) => {187					let mut out = Vec::new();188					for item in list {189						let item = item.clone().unwrap_if_lazy()?;190						out.push(evaluate_comp(191							context.with_var(var.clone(), item)?,192							value,193							&specs[1..],194						)?);195					}196					Some(out.iter().flatten().flatten().cloned().collect())197				}198				_ => panic!("for expression evaluated to non-iterable value"),199			}200		}201	})202}203204// TODO: Asserts205pub fn evaluate_object(context: Context, object: ObjBody) -> Result<ObjValue> {206	Ok(match object {207		ObjBody::MemberList(members) => {208			let new_bindings = FutureNewBindings::new();209			let future_this = FutureObjValue::new();210			let context_creator = context_creator!(211				closure!(clone context, clone new_bindings, clone future_this, |this: Option<ObjValue>, super_obj: Option<ObjValue>| {212					Ok(context.clone().extend(213						new_bindings.clone().unwrap(),214						context.clone().dollar().clone().or_else(||this.clone()),215						Some(this.unwrap()),216						super_obj217					)?)218				})219			);220			{221				let mut bindings: HashMap<String, LazyBinding> = HashMap::new();222				for (n, b) in members223					.iter()224					.filter_map(|m| match m {225						Member::BindStmt(b) => Some(b.clone()),226						_ => None,227					})228					.map(|b| evaluate_binding(&b, context_creator.clone()))229				{230					bindings.insert(n, b);231				}232				new_bindings.fill(bindings);233			}234235			let mut new_members = BTreeMap::new();236			for member in members.into_iter() {237				match member {238					Member::Field(FieldMember {239						name,240						plus,241						params: None,242						visibility,243						value,244					}) => {245						let name = evaluate_field_name(context.clone(), &name)?;246						if name.is_none() {247							continue;248						}249						let name = name.unwrap();250						new_members.insert(251							name.clone(),252							ObjMember {253								add: plus,254								visibility: visibility.clone(),255								invoke: binding!(256									closure!(clone name, clone value, clone context_creator, |this, super_obj| {257										push(value.clone(), "object ".to_owned()+&name+" field", ||{258											let context = context_creator.0(this, super_obj)?;259											evaluate(260												context,261												&value,262											)?.unwrap_if_lazy()263										})264									})265								),266							},267						);268					}269					Member::Field(FieldMember {270						name,271						params: Some(params),272						value,273						..274					}) => {275						let name = evaluate_field_name(context.clone(), &name)?;276						if name.is_none() {277							continue;278						}279						let name = name.unwrap();280						new_members.insert(281							name,282							ObjMember {283								add: false,284								visibility: Visibility::Hidden,285								invoke: binding!(286									closure!(clone value, clone context_creator, |this, super_obj| {287										// TODO: Assert288										Ok(evaluate_method(289											context_creator.0(this, super_obj)?,290											&value.clone(),291											params.clone(),292										))293									})294								),295							},296						);297					}298					Member::BindStmt(_) => {}299					Member::AssertStmt(_) => {}300				}301			}302			future_this.fill(ObjValue::new(None, Rc::new(new_members)))303		}304		_ => todo!(),305	})306}307308pub fn evaluate(context: Context, expr: &LocExpr) -> Result<Val> {309	use Expr::*;310	let locexpr = expr.clone();311	let LocExpr(expr, loc) = expr;312	Ok(match &**expr {313		Literal(LiteralType::This) => Val::Obj(314			context315				.this()316				.clone()317				.unwrap_or_else(|| panic!("this not found")),318		),319		Literal(LiteralType::Dollar) => Val::Obj(320			context321				.dollar()322				.clone()323				.unwrap_or_else(|| panic!("dollar not found")),324		),325		Literal(LiteralType::True) => Val::Bool(true),326		Literal(LiteralType::False) => Val::Bool(false),327		Literal(LiteralType::Null) => Val::Null,328		Parened(e) => evaluate(context, e)?,329		Str(v) => Val::Str(v.clone()),330		Num(v) => Val::Num(*v),331		BinaryOp(v1, o, v2) => evaluate_binary_op_special(context, &v1, *o, &v2)?,332		UnaryOp(o, v) => evaluate_unary_op(*o, &evaluate(context, v)?)?,333		Var(name) => push(locexpr, "var".to_owned(), || {334			Val::Lazy(context.binding(&name)).unwrap_if_lazy()335		})?,336		Index(LocExpr(v, _), index) if matches!(&**v, Expr::Literal(LiteralType::Super)) => {337			let name = evaluate(context.clone(), index)?.try_cast_str("object index")?;338			context339				.super_obj()340				.clone()341				.expect("no super found")342				.get_raw(&name, &context.this().clone().expect("no this found"))?343				.expect("value not found")344		}345		Index(value, index) => {346			match (347				evaluate(context.clone(), value)?.unwrap_if_lazy()?,348				evaluate(context, index)?,349			) {350				(Val::Obj(v), Val::Str(s)) => {351					if let Some(v) = v.get(&s)? {352						v.unwrap_if_lazy()?353					} else if let Some(Val::Str(n)) = v.get("__intristic_namespace__")? {354						Val::Intristic(n, s)355					} else {356						create_error(crate::Error::NoSuchField(s))?357					}358				}359				(Val::Arr(v), Val::Num(n)) => v360					.get(n as usize)361					.unwrap_or_else(|| panic!("out of bounds"))362					.clone()363					.unwrap_if_lazy()?,364				(Val::Str(s), Val::Num(n)) => {365					Val::Str(s.chars().skip(n as usize).take(1).collect())366				}367				(v, i) => todo!("not implemented: {:?}[{:?}]", v, i.unwrap_if_lazy()),368			}369		}370		LocalExpr(bindings, returned) => {371			let mut new_bindings: HashMap<String, LazyBinding> = HashMap::new();372			let future_context = Context::new_future();373374			let context_creator = context_creator!(375				closure!(clone future_context, |_, _| Ok(future_context.clone().unwrap()))376			);377378			for (k, v) in bindings379				.iter()380				.map(|b| evaluate_binding(b, context_creator.clone()))381			{382				new_bindings.insert(k, v);383			}384385			let context = context386				.extend(new_bindings, None, None, None)?387				.into_future(future_context);388			evaluate(context, &returned.clone())?389		}390		Arr(items) => {391			let mut out = Vec::with_capacity(items.len());392			for item in items {393				out.push(Val::Lazy(lazy_val!(394					closure!(clone context, clone item, || {395						evaluate(context.clone(), &item)396					})397				)));398			}399			Val::Arr(out)400		}401		ArrComp(expr, compspecs) => Val::Arr(402			// First compspec should be forspec, so no "None" possible here403			evaluate_comp(context, expr, compspecs)?.unwrap(),404		),405		Obj(body) => Val::Obj(evaluate_object(context, body.clone())?),406		ObjExtend(s, t) => evaluate_add_op(407			&evaluate(context.clone(), s)?,408			&Val::Obj(evaluate_object(context, t.clone())?),409		)?,410		Apply(value, ArgsDesc(args), tailstrict) => {411			let value = evaluate(context.clone(), value)?.unwrap_if_lazy()?;412			match value {413				Val::Intristic(ns, name) => match (&ns as &str, &name as &str) {414					// arr/string/function415					("std", "length") => {416						assert_eq!(args.len(), 1);417						let expr = &args.get(0).unwrap().1;418						match evaluate(context, expr)? {419							Val::Str(n) => Val::Num(n.chars().count() as f64),420							Val::Arr(i) => Val::Num(i.len() as f64),421							Val::Obj(o) => Val::Num(o.fields().len() as f64),422							v => panic!("can't get length of {:?}", v),423						}424					}425					// any426					("std", "type") => {427						assert_eq!(args.len(), 1);428						let expr = &args.get(0).unwrap().1;429						Val::Str(evaluate(context, expr)?.value_type()?.name().to_owned())430					}431					// length, idx=>any432					("std", "makeArray") => {433						assert_eq!(args.len(), 2);434						if let (Val::Num(v), Val::Func(d)) = (435							evaluate(context.clone(), &args[0].1)?,436							evaluate(context, &args[1].1)?,437						) {438							assert!(v >= 0.0);439							let mut out = Vec::with_capacity(v as usize);440							for i in 0..v as usize {441								out.push(d.evaluate(vec![(None, Val::Num(i as f64))])?)442							}443							Val::Arr(out)444						} else {445							panic!("bad makeArray call");446						}447					}448					// string449					("std", "codepoint") => {450						assert_eq!(args.len(), 1);451						if let Val::Str(s) = evaluate(context, &args[0].1)? {452							assert!(453								s.chars().count() == 1,454								"std.codepoint should receive single char string"455							);456							Val::Num(s.chars().take(1).next().unwrap() as u32 as f64)457						} else {458							panic!("bad codepoint call");459						}460					}461					// object, includeHidden462					("std", "objectFieldsEx") => {463						assert_eq!(args.len(), 2);464						if let (Val::Obj(body), Val::Bool(_include_hidden)) = (465							evaluate(context.clone(), &args[0].1)?,466							evaluate(context, &args[1].1)?,467						) {468							// TODO: handle visibility (_include_hidden)469							Val::Arr(body.fields().into_iter().map(Val::Str).collect())470						} else {471							panic!("bad objectFieldsEx call");472						}473					}474					("std", "primitiveEquals") => {475						assert_eq!(args.len(), 2);476						let (a, b) = (477							evaluate(context.clone(), &args[0].1)?,478							evaluate(context, &args[1].1)?,479						);480						Val::Bool(a == b)481					}482					("std", "modulo") => {483						assert_eq!(args.len(), 2);484						if let (Val::Num(a), Val::Num(b)) = (485							evaluate(context.clone(), &args[0].1)?,486							evaluate(context, &args[1].1)?,487						) {488							Val::Num(a % b)489						} else {490							panic!("bad modulo call");491						}492					}493					("std", "floor") => {494						assert_eq!(args.len(), 1);495						if let Val::Num(a) = evaluate(context, &args[0].1)? {496							Val::Num(a.floor())497						} else {498							panic!("bad floor call");499						}500					}501					("std", "trace") => {502						assert_eq!(args.len(), 2);503						if let (Val::Str(a), b) = (504							evaluate(context.clone(), &args[0].1)?,505							evaluate(context, &args[1].1)?,506						) {507							// TODO: Line numbers as in original jsonnet508							println!("TRACE: {}", a);509							b510						} else {511							panic!("bad trace call");512						}513					}514					(ns, name) => panic!("Intristic not found: {}.{}", ns, name),515				},516				Val::Func(f) => push(locexpr, "function call".to_owned(), || {517					f.evaluate(518						args.clone()519							.into_iter()520							.map(move |a| {521								(522									a.clone().0,523									if *tailstrict {524										Val::Lazy(LazyVal::new_resolved(525											evaluate(context.clone(), &a.1).unwrap(),526										))527									} else {528										Val::Lazy(lazy_val!(529											closure!(clone context, clone a, || evaluate(context.clone(), &a.clone().1))530										))531									},532								)533							})534							.collect(),535					)536				})?,537				_ => panic!("{:?} is not a function", value),538			}539		}540		Function(params, body) => evaluate_method(context, body, params.clone()),541		AssertExpr(AssertStmt(value, msg), returned) => {542			let assertion_result = push(value.clone(), "assertion condition".to_owned(), || {543				evaluate(context.clone(), &value)?544					.try_cast_bool("assertion condition should be boolean")545			})?;546			if assertion_result {547				push(548					returned.clone(),549					"assert 'return' branch".to_owned(),550					|| evaluate(context, returned),551				)?552			} else if let Some(msg) = msg {553				panic!(554					"assertion failed ({:?}): {}",555					value,556					evaluate(context, msg)?.try_cast_str("assertion message should be string")?557				);558			} else {559				panic!("assertion failed ({:?}): no message", value);560			}561		}562		Error(e) => create_error(crate::Error::RuntimeError(563			evaluate(context, e)?.try_cast_str("error text should be string")?,564		))?,565		IfElse {566			cond,567			cond_then,568			cond_else,569		} => {570			let condition_result = push(cond.0.clone(), "if condition".to_owned(), || {571				evaluate(context.clone(), &cond.0)?.try_cast_bool("if condition should be boolean")572			})?;573			if condition_result {574				push(575					cond_then.clone(),576					"if condition 'then' branch".to_owned(),577					|| evaluate(context, cond_then),578				)?579			} else {580				match cond_else {581					Some(v) => push(v.clone(), "if condition 'else' branch".to_owned(), || {582						evaluate(context, v)583					})?,584					None => Val::Null,585				}586			}587		}588		_ => panic!(589			"evaluation not implemented: {:?}",590			LocExpr(expr.clone(), loc.clone())591		),592	})593}