1use crate::{2 error::Error::*, lazy_val, push, throw, with_state, Context, ContextCreator, FuncDesc, FuncVal,3 FutureWrapper, LazyBinding, LazyVal, ObjMember, ObjValue, Result, Val,4};5use closure::closure;6use jrsonnet_interner::IStr;7use jrsonnet_parser::{8 ArgsDesc, AssertStmt, BinaryOpType, BindSpec, CompSpec, Expr, ExprLocation, FieldMember,9 ForSpecData, IfSpecData, LiteralType, LocExpr, Member, ObjBody, ParamsDesc, UnaryOpType,10 Visibility,11};12use jrsonnet_types::ValType;13use rustc_hash::{FxHashMap, FxHasher};14use std::{collections::HashMap, hash::BuildHasherDefault, rc::Rc};1516pub fn evaluate_binding_in_future(17 b: &BindSpec,18 context_creator: FutureWrapper<Context>,19) -> LazyVal {20 let b = b.clone();21 if let Some(params) = &b.params {22 let params = params.clone();23 LazyVal::new(Box::new(move || {24 Ok(evaluate_method(25 context_creator.unwrap(),26 b.name.clone(),27 params.clone(),28 b.value.clone(),29 ))30 }))31 } else {32 LazyVal::new(Box::new(move || {33 evaluate_named(context_creator.unwrap(), &b.value, b.name.clone())34 }))35 }36}3738pub fn evaluate_binding(b: &BindSpec, context_creator: ContextCreator) -> (IStr, LazyBinding) {39 let b = b.clone();40 if let Some(params) = &b.params {41 let params = params.clone();42 (43 b.name.clone(),44 LazyBinding::Bindable(Rc::new(move |this, super_obj| {45 Ok(lazy_val!(46 closure!(clone b, clone params, clone context_creator, || Ok(evaluate_method(47 context_creator.create(this.clone(), super_obj.clone())?,48 b.name.clone(),49 params.clone(),50 b.value.clone(),51 )))52 ))53 })),54 )55 } else {56 (57 b.name.clone(),58 LazyBinding::Bindable(Rc::new(move |this, super_obj| {59 Ok(lazy_val!(closure!(clone context_creator, clone b, ||60 evaluate_named(61 context_creator.create(this.clone(), super_obj.clone())?,62 &b.value,63 b.name.clone()64 )65 )))66 })),67 )68 }69}7071pub fn evaluate_method(ctx: Context, name: IStr, params: ParamsDesc, body: LocExpr) -> Val {72 Val::Func(Rc::new(FuncVal::Normal(FuncDesc {73 name,74 ctx,75 params,76 body,77 })))78}7980pub fn evaluate_field_name(81 context: Context,82 field_name: &jrsonnet_parser::FieldName,83) -> Result<Option<IStr>> {84 Ok(match field_name {85 jrsonnet_parser::FieldName::Fixed(n) => Some(n.clone()),86 jrsonnet_parser::FieldName::Dyn(expr) => {87 let value = evaluate(context, expr)?;88 if matches!(value, Val::Null) {89 None90 } else {91 Some(value.try_cast_str("dynamic field name")?)92 }93 }94 })95}9697pub fn evaluate_unary_op(op: UnaryOpType, b: &Val) -> Result<Val> {98 Ok(match (op, b) {99 (UnaryOpType::Not, Val::Bool(v)) => Val::Bool(!v),100 (UnaryOpType::Minus, Val::Num(n)) => Val::Num(-*n),101 (UnaryOpType::BitNot, Val::Num(n)) => Val::Num(!(*n as i32) as f64),102 (op, o) => throw!(UnaryOperatorDoesNotOperateOnType(op, o.value_type())),103 })104}105106pub fn evaluate_add_op(a: &Val, b: &Val) -> Result<Val> {107 Ok(match (a, b) {108 (Val::Str(v1), Val::Str(v2)) => Val::Str(((**v1).to_owned() + v2).into()),109110 111 (Val::Num(n), Val::Str(o)) => Val::Str(format!("{}{}", n, o).into()),112 (Val::Str(o), Val::Num(n)) => Val::Str(format!("{}{}", o, n).into()),113114 (Val::Str(s), o) => Val::Str(format!("{}{}", s, o.clone().to_string()?).into()),115 (o, Val::Str(s)) => Val::Str(format!("{}{}", o.clone().to_string()?, s).into()),116117 (Val::Obj(v1), Val::Obj(v2)) => Val::Obj(v2.extend_from(v1.clone())),118 (Val::Arr(a), Val::Arr(b)) => {119 let mut out = Vec::with_capacity(a.len() + b.len());120 out.extend(a.iter_lazy());121 out.extend(b.iter_lazy());122 Val::Arr(out.into())123 }124 (Val::Num(v1), Val::Num(v2)) => Val::new_checked_num(v1 + v2)?,125 _ => throw!(BinaryOperatorDoesNotOperateOnValues(126 BinaryOpType::Add,127 a.value_type(),128 b.value_type(),129 )),130 })131}132133pub fn evaluate_binary_op_special(134 context: Context,135 a: &LocExpr,136 op: BinaryOpType,137 b: &LocExpr,138) -> Result<Val> {139 Ok(match (evaluate(context.clone(), a)?, op, b) {140 (Val::Bool(true), BinaryOpType::Or, _o) => Val::Bool(true),141 (Val::Bool(false), BinaryOpType::And, _o) => Val::Bool(false),142 (a, op, eb) => evaluate_binary_op_normal(&a, op, &evaluate(context, eb)?)?,143 })144}145146pub fn evaluate_binary_op_normal(a: &Val, op: BinaryOpType, b: &Val) -> Result<Val> {147 Ok(match (a, op, b) {148 (a, BinaryOpType::Add, b) => evaluate_add_op(a, b)?,149150 (Val::Str(v1), BinaryOpType::Mul, Val::Num(v2)) => Val::Str(v1.repeat(*v2 as usize).into()),151152 153 (Val::Bool(a), BinaryOpType::And, Val::Bool(b)) => Val::Bool(*a && *b),154 (Val::Bool(a), BinaryOpType::Or, Val::Bool(b)) => Val::Bool(*a || *b),155156 157 (Val::Str(v1), BinaryOpType::Lt, Val::Str(v2)) => Val::Bool(v1 < v2),158 (Val::Str(v1), BinaryOpType::Gt, Val::Str(v2)) => Val::Bool(v1 > v2),159 (Val::Str(v1), BinaryOpType::Lte, Val::Str(v2)) => Val::Bool(v1 <= v2),160 (Val::Str(v1), BinaryOpType::Gte, Val::Str(v2)) => Val::Bool(v1 >= v2),161162 163 (Val::Num(v1), BinaryOpType::Mul, Val::Num(v2)) => Val::new_checked_num(v1 * v2)?,164 (Val::Num(v1), BinaryOpType::Div, Val::Num(v2)) => {165 if *v2 <= f64::EPSILON {166 throw!(DivisionByZero)167 }168 Val::new_checked_num(v1 / v2)?169 }170171 (Val::Num(v1), BinaryOpType::Sub, Val::Num(v2)) => Val::new_checked_num(v1 - v2)?,172173 (Val::Num(v1), BinaryOpType::Lt, Val::Num(v2)) => Val::Bool(v1 < v2),174 (Val::Num(v1), BinaryOpType::Gt, Val::Num(v2)) => Val::Bool(v1 > v2),175 (Val::Num(v1), BinaryOpType::Lte, Val::Num(v2)) => Val::Bool(v1 <= v2),176 (Val::Num(v1), BinaryOpType::Gte, Val::Num(v2)) => Val::Bool(v1 >= v2),177178 (Val::Num(v1), BinaryOpType::BitAnd, Val::Num(v2)) => {179 Val::Num(((*v1 as i32) & (*v2 as i32)) as f64)180 }181 (Val::Num(v1), BinaryOpType::BitOr, Val::Num(v2)) => {182 Val::Num(((*v1 as i32) | (*v2 as i32)) as f64)183 }184 (Val::Num(v1), BinaryOpType::BitXor, Val::Num(v2)) => {185 Val::Num(((*v1 as i32) ^ (*v2 as i32)) as f64)186 }187 (Val::Num(v1), BinaryOpType::Lhs, Val::Num(v2)) => {188 if *v2 < 0.0 {189 throw!(RuntimeError("shift by negative exponent".into()))190 }191 Val::Num(((*v1 as i32) << (*v2 as i32)) as f64)192 }193 (Val::Num(v1), BinaryOpType::Rhs, Val::Num(v2)) => {194 if *v2 < 0.0 {195 throw!(RuntimeError("shift by negative exponent".into()))196 }197 Val::Num(((*v1 as i32) >> (*v2 as i32)) as f64)198 }199200 _ => throw!(BinaryOperatorDoesNotOperateOnValues(201 op,202 a.value_type(),203 b.value_type(),204 )),205 })206}207208pub fn evaluate_comp<T>(209 context: Context,210 value: &impl Fn(Context) -> Result<T>,211 specs: &[CompSpec],212) -> Result<Option<Vec<T>>> {213 Ok(match specs.get(0) {214 None => Some(vec![value(context)?]),215 Some(CompSpec::IfSpec(IfSpecData(cond))) => {216 if evaluate(context.clone(), cond)?.try_cast_bool("if spec")? {217 evaluate_comp(context, value, &specs[1..])?218 } else {219 None220 }221 }222 Some(CompSpec::ForSpec(ForSpecData(var, expr))) => match evaluate(context.clone(), expr)? {223 Val::Arr(list) => {224 let mut out = Vec::new();225 for item in list.iter() {226 out.push(evaluate_comp(227 context.clone().with_var(var.clone(), item?.clone()),228 value,229 &specs[1..],230 )?);231 }232 Some(out.into_iter().flatten().flatten().collect())233 }234 _ => throw!(InComprehensionCanOnlyIterateOverArray),235 },236 })237}238239pub fn evaluate_member_list_object(context: Context, members: &[Member]) -> Result<ObjValue> {240 let new_bindings = FutureWrapper::new();241 let future_this = FutureWrapper::new();242 let context_creator = ContextCreator(context.clone(), new_bindings.clone());243 {244 let mut bindings: FxHashMap<IStr, LazyBinding> =245 FxHashMap::with_capacity_and_hasher(members.len(), BuildHasherDefault::default());246 for (n, b) in members247 .iter()248 .filter_map(|m| match m {249 Member::BindStmt(b) => Some(b.clone()),250 _ => None,251 })252 .map(|b| evaluate_binding(&b, context_creator.clone()))253 {254 bindings.insert(n, b);255 }256 new_bindings.fill(bindings);257 }258259 let mut new_members = FxHashMap::default();260 for member in members.iter() {261 match member {262 Member::Field(FieldMember {263 name,264 plus,265 params: None,266 visibility,267 value,268 }) => {269 let name = evaluate_field_name(context.clone(), name)?;270 if name.is_none() {271 continue;272 }273 let name = name.unwrap();274 new_members.insert(275 name.clone(),276 ObjMember {277 add: *plus,278 visibility: *visibility,279 invoke: LazyBinding::Bindable(Rc::new(280 closure!(clone name, clone value, clone context_creator, |this, super_obj| {281 Ok(LazyVal::new_resolved(evaluate(282 context_creator.create(this, super_obj)?,283 &value,284 )?))285 }),286 )),287 location: value.1.clone(),288 },289 );290 }291 Member::Field(FieldMember {292 name,293 params: Some(params),294 value,295 ..296 }) => {297 let name = evaluate_field_name(context.clone(), name)?;298 if name.is_none() {299 continue;300 }301 let name = name.unwrap();302 new_members.insert(303 name.clone(),304 ObjMember {305 add: false,306 visibility: Visibility::Hidden,307 invoke: LazyBinding::Bindable(Rc::new(308 closure!(clone value, clone context_creator, clone params, clone name, |this, super_obj| {309 310 Ok(LazyVal::new_resolved(evaluate_method(311 context_creator.create(this, super_obj)?,312 name.clone(),313 params.clone(),314 value.clone(),315 )))316 }),317 )),318 location: value.1.clone(),319 },320 );321 }322 Member::BindStmt(_) => {}323 Member::AssertStmt(_) => {}324 }325 }326 let this = ObjValue::new(None, Rc::new(new_members));327 future_this.fill(this.clone());328 Ok(this)329}330331pub fn evaluate_object(context: Context, object: &ObjBody) -> Result<ObjValue> {332 Ok(match object {333 ObjBody::MemberList(members) => evaluate_member_list_object(context, members)?,334 ObjBody::ObjComp(obj) => {335 let future_this = FutureWrapper::new();336 let mut new_members = FxHashMap::default();337 for (k, v) in evaluate_comp(338 context.clone(),339 &|ctx| {340 let new_bindings = FutureWrapper::new();341 let context_creator = ContextCreator(context.clone(), new_bindings.clone());342 let mut bindings: FxHashMap<IStr, LazyBinding> = FxHashMap::with_capacity_and_hasher(obj.pre_locals.len() + obj.post_locals.len(), BuildHasherDefault::default());343 for (n, b) in obj344 .pre_locals345 .iter()346 .chain(obj.post_locals.iter())347 .map(|b| evaluate_binding(b, context_creator.clone()))348 {349 bindings.insert(n, b);350 }351 new_bindings.fill(bindings.clone());352 let ctx = ctx.extend_unbound(bindings, None, None, None)?;353 let key = evaluate(ctx.clone(), &obj.key)?;354 let value = LazyBinding::Bindable(Rc::new(355 closure!(clone ctx, clone obj.value, |this, _super_obj| {356 Ok(LazyVal::new_resolved(evaluate(ctx.clone().extend(FxHashMap::default(), None, this, None), &value)?))357 }),358 ));359360 Ok((key, value))361 },362 &obj.compspecs,363 )?364 .unwrap()365 {366 match k {367 Val::Null => {}368 Val::Str(n) => {369 new_members.insert(370 n,371 ObjMember {372 add: false,373 visibility: Visibility::Normal,374 invoke: v,375 location: obj.value.1.clone(),376 },377 );378 }379 v => throw!(FieldMustBeStringGot(v.value_type())),380 }381 }382383 let this = ObjValue::new(None, Rc::new(new_members));384 future_this.fill(this.clone());385 this386 }387 })388}389390pub fn evaluate_apply(391 context: Context,392 value: &LocExpr,393 args: &ArgsDesc,394 loc: Option<&ExprLocation>,395 tailstrict: bool,396) -> Result<Val> {397 let value = evaluate(context.clone(), value)?;398 Ok(match value {399 Val::Func(f) => {400 let body = || f.evaluate(context, loc, args, tailstrict);401 if tailstrict {402 body()?403 } else {404 push(loc, || format!("function <{}> call", f.name()), body)?405 }406 }407 v => throw!(OnlyFunctionsCanBeCalledGot(v.value_type())),408 })409}410411pub fn evaluate_named(context: Context, lexpr: &LocExpr, name: IStr) -> Result<Val> {412 use Expr::*;413 let LocExpr(expr, _loc) = lexpr;414 Ok(match &**expr {415 Function(params, body) => evaluate_method(context, name, params.clone(), body.clone()),416 _ => evaluate(context, lexpr)?,417 })418}419420pub fn evaluate(context: Context, expr: &LocExpr) -> Result<Val> {421 use Expr::*;422 let LocExpr(expr, loc) = expr;423 Ok(match &**expr {424 Literal(LiteralType::This) => {425 Val::Obj(context.this().clone().ok_or(CantUseSelfOutsideOfObject)?)426 }427 Literal(LiteralType::Super) => Val::Obj(428 context429 .super_obj()430 .clone()431 .ok_or(NoSuperFound)?432 .with_this(context.this().clone().unwrap()),433 ),434 Literal(LiteralType::Dollar) => {435 Val::Obj(context.dollar().clone().ok_or(NoTopLevelObjectFound)?)436 }437 Literal(LiteralType::True) => Val::Bool(true),438 Literal(LiteralType::False) => Val::Bool(false),439 Literal(LiteralType::Null) => Val::Null,440 Parened(e) => evaluate(context, e)?,441 Str(v) => Val::Str(v.clone()),442 Num(v) => Val::new_checked_num(*v)?,443 BinaryOp(v1, o, v2) => evaluate_binary_op_special(context, v1, *o, v2)?,444 UnaryOp(o, v) => evaluate_unary_op(*o, &evaluate(context, v)?)?,445 Var(name) => push(446 loc.as_ref(),447 || format!("variable <{}>", name),448 || context.binding(name.clone())?.evaluate(),449 )?,450 Index(value, index) => {451 match (evaluate(context.clone(), value)?, evaluate(context, index)?) {452 (Val::Obj(v), Val::Str(s)) => {453 let sn = s.clone();454 push(455 loc.as_ref(),456 || format!("field <{}> access", sn),457 || {458 if let Some(v) = v.get(s.clone())? {459 Ok(v)460 } else if v.get("__intrinsic_namespace__".into())?.is_some() {461 Ok(Val::Func(Rc::new(FuncVal::Intrinsic(s))))462 } else {463 throw!(NoSuchField(s))464 }465 },466 )?467 }468 (Val::Obj(_), n) => throw!(ValueIndexMustBeTypeGot(469 ValType::Obj,470 ValType::Str,471 n.value_type(),472 )),473474 (Val::Arr(v), Val::Num(n)) => {475 if n.fract() > f64::EPSILON {476 throw!(FractionalIndex)477 }478 v.get(n as usize)?479 .ok_or_else(|| ArrayBoundsError(n as usize, v.len()))?480 }481 (Val::Arr(_), Val::Str(n)) => throw!(AttemptedIndexAnArrayWithString(n)),482 (Val::Arr(_), n) => throw!(ValueIndexMustBeTypeGot(483 ValType::Arr,484 ValType::Num,485 n.value_type(),486 )),487488 (Val::Str(s), Val::Num(n)) => Val::Str(489 s.chars()490 .skip(n as usize)491 .take(1)492 .collect::<String>()493 .into(),494 ),495 (Val::Str(_), n) => throw!(ValueIndexMustBeTypeGot(496 ValType::Str,497 ValType::Num,498 n.value_type(),499 )),500501 (v, _) => throw!(CantIndexInto(v.value_type())),502 }503 }504 LocalExpr(bindings, returned) => {505 let mut new_bindings: FxHashMap<IStr, LazyVal> = HashMap::with_capacity_and_hasher(506 bindings.len(),507 BuildHasherDefault::<FxHasher>::default(),508 );509 let future_context = Context::new_future();510 for b in bindings {511 new_bindings.insert(512 b.name.clone(),513 evaluate_binding_in_future(b, future_context.clone()),514 );515 }516 let context = context517 .extend_bound(new_bindings)518 .into_future(future_context);519 evaluate(context, &returned.clone())?520 }521 Arr(items) => {522 let mut out = Vec::with_capacity(items.len());523 for item in items {524 out.push(LazyVal::new(Box::new(525 closure!(clone context, clone item, || {526 evaluate(context.clone(), &item)527 }),528 )));529 }530 Val::Arr(out.into())531 }532 ArrComp(expr, comp_specs) => Val::Arr(533 534 evaluate_comp(context, &|ctx| evaluate(ctx, expr), comp_specs)?535 .unwrap()536 .into(),537 ),538 Obj(body) => Val::Obj(evaluate_object(context, body)?),539 ObjExtend(s, t) => evaluate_add_op(540 &evaluate(context.clone(), s)?,541 &Val::Obj(evaluate_object(context, t)?),542 )?,543 Apply(value, args, tailstrict) => {544 evaluate_apply(context, value, args, loc.as_ref(), *tailstrict)?545 }546 Function(params, body) => {547 evaluate_method(context, "anonymous".into(), params.clone(), body.clone())548 }549 Intrinsic(name) => Val::Func(Rc::new(FuncVal::Intrinsic(name.clone()))),550 AssertExpr(AssertStmt(value, msg), returned) => {551 let assertion_result = push(552 value.1.as_ref(),553 || "assertion condition".to_owned(),554 || {555 evaluate(context.clone(), value)?556 .try_cast_bool("assertion condition should be of type `boolean`")557 },558 )?;559 if assertion_result {560 evaluate(context, returned)?561 } else {562 push(563 value.1.as_ref(),564 || "assertion failure".to_owned(),565 || {566 if let Some(msg) = msg {567 throw!(AssertionFailed(evaluate(context, msg)?.to_string()?));568 } else {569 throw!(AssertionFailed(Val::Null.to_string()?));570 }571 },572 )?573 }574 }575 ErrorStmt(e) => push(576 loc.as_ref(),577 || "error statement".to_owned(),578 || {579 throw!(RuntimeError(580 evaluate(context, e)?.try_cast_str("error text should be of type `string`")?,581 ))582 },583 )?,584 IfElse {585 cond,586 cond_then,587 cond_else,588 } => {589 if push(590 loc.as_ref(),591 || "if condition".to_owned(),592 || evaluate(context.clone(), &cond.0)?.try_cast_bool("in if condition"),593 )? {594 evaluate(context, cond_then)?595 } else {596 match cond_else {597 Some(v) => evaluate(context, v)?,598 None => Val::Null,599 }600 }601 }602 Import(path) => {603 let mut tmp = loc604 .clone()605 .expect("imports cannot be used without loc_data")606 .0;607 let import_location = Rc::make_mut(&mut tmp);608 import_location.pop();609 push(610 loc.as_ref(),611 || format!("import {:?}", path),612 || with_state(|s| s.import_file(import_location, path)),613 )?614 }615 ImportStr(path) => {616 let mut tmp = loc617 .clone()618 .expect("imports cannot be used without loc_data")619 .0;620 let import_location = Rc::make_mut(&mut tmp);621 import_location.pop();622 Val::Str(with_state(|s| s.import_file_str(import_location, path))?)623 }624 })625}