1use crate::{2 context_creator, error::Error::*, lazy_val, push, throw, with_state, Context, ContextCreator,3 FuncDesc, FuncVal, 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;14use std::{collections::HashMap, rc::Rc};1516pub fn evaluate_binding(b: &BindSpec, context_creator: ContextCreator) -> (IStr, LazyBinding) {17 let b = b.clone();18 if let Some(params) = &b.params {19 let params = params.clone();20 (21 b.name.clone(),22 LazyBinding::Bindable(Rc::new(move |this, super_obj| {23 Ok(lazy_val!(24 closure!(clone b, clone params, clone context_creator, || Ok(evaluate_method(25 context_creator.0(this.clone(), super_obj.clone())?,26 b.name.clone(),27 params.clone(),28 b.value.clone(),29 )))30 ))31 })),32 )33 } else {34 (35 b.name.clone(),36 LazyBinding::Bindable(Rc::new(move |this, super_obj| {37 Ok(lazy_val!(closure!(clone context_creator, clone b, ||38 evaluate_named(39 context_creator.0(this.clone(), super_obj.clone())?,40 &b.value,41 b.name.clone()42 )43 )))44 })),45 )46 }47}4849pub fn evaluate_method(ctx: Context, name: IStr, params: ParamsDesc, body: LocExpr) -> Val {50 Val::Func(Rc::new(FuncVal::Normal(FuncDesc {51 name,52 ctx,53 params,54 body,55 })))56}5758pub fn evaluate_field_name(59 context: Context,60 field_name: &jrsonnet_parser::FieldName,61) -> Result<Option<IStr>> {62 Ok(match field_name {63 jrsonnet_parser::FieldName::Fixed(n) => Some(n.clone()),64 jrsonnet_parser::FieldName::Dyn(expr) => {65 let value = evaluate(context, expr)?;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 (UnaryOpType::Not, Val::Bool(v)) => Val::Bool(!v),78 (UnaryOpType::Minus, Val::Num(n)) => Val::Num(-*n),79 (UnaryOpType::BitNot, Val::Num(n)) => Val::Num(!(*n as i32) as f64),80 (op, o) => throw!(UnaryOperatorDoesNotOperateOnType(op, o.value_type())),81 })82}8384pub fn evaluate_add_op(a: &Val, b: &Val) -> Result<Val> {85 Ok(match (a, b) {86 (Val::Str(v1), Val::Str(v2)) => Val::Str(((**v1).to_owned() + v2).into()),8788 89 (Val::Num(n), Val::Str(o)) => Val::Str(format!("{}{}", n, o).into()),90 (Val::Str(o), Val::Num(n)) => Val::Str(format!("{}{}", o, n).into()),9192 (Val::Str(s), o) => Val::Str(format!("{}{}", s, o.clone().to_string()?).into()),93 (o, Val::Str(s)) => Val::Str(format!("{}{}", o.clone().to_string()?, s).into()),9495 (Val::Obj(v1), Val::Obj(v2)) => Val::Obj(v2.extend_from(v1.clone())),96 (Val::Arr(a), Val::Arr(b)) => {97 let mut out = Vec::with_capacity(a.len() + b.len());98 out.extend(a.iter_lazy());99 out.extend(b.iter_lazy());100 Val::Arr(out.into())101 }102 (Val::Num(v1), Val::Num(v2)) => Val::new_checked_num(v1 + v2)?,103 _ => throw!(BinaryOperatorDoesNotOperateOnValues(104 BinaryOpType::Add,105 a.value_type(),106 b.value_type(),107 )),108 })109}110111pub fn evaluate_binary_op_special(112 context: Context,113 a: &LocExpr,114 op: BinaryOpType,115 b: &LocExpr,116) -> Result<Val> {117 Ok(match (evaluate(context.clone(), a)?, op, b) {118 (Val::Bool(true), BinaryOpType::Or, _o) => Val::Bool(true),119 (Val::Bool(false), BinaryOpType::And, _o) => Val::Bool(false),120 (a, op, eb) => evaluate_binary_op_normal(&a, op, &evaluate(context, eb)?)?,121 })122}123124pub fn evaluate_binary_op_normal(a: &Val, op: BinaryOpType, b: &Val) -> Result<Val> {125 Ok(match (a, op, b) {126 (a, BinaryOpType::Add, b) => evaluate_add_op(a, b)?,127128 (Val::Str(v1), BinaryOpType::Mul, Val::Num(v2)) => Val::Str(v1.repeat(*v2 as usize).into()),129130 131 (Val::Bool(a), BinaryOpType::And, Val::Bool(b)) => Val::Bool(*a && *b),132 (Val::Bool(a), BinaryOpType::Or, Val::Bool(b)) => Val::Bool(*a || *b),133134 135 (Val::Str(v1), BinaryOpType::Lt, Val::Str(v2)) => Val::Bool(v1 < v2),136 (Val::Str(v1), BinaryOpType::Gt, Val::Str(v2)) => Val::Bool(v1 > v2),137 (Val::Str(v1), BinaryOpType::Lte, Val::Str(v2)) => Val::Bool(v1 <= v2),138 (Val::Str(v1), BinaryOpType::Gte, Val::Str(v2)) => Val::Bool(v1 >= v2),139140 141 (Val::Num(v1), BinaryOpType::Mul, Val::Num(v2)) => Val::new_checked_num(v1 * v2)?,142 (Val::Num(v1), BinaryOpType::Div, Val::Num(v2)) => {143 if *v2 <= f64::EPSILON {144 throw!(DivisionByZero)145 }146 Val::new_checked_num(v1 / v2)?147 }148149 (Val::Num(v1), BinaryOpType::Sub, Val::Num(v2)) => Val::new_checked_num(v1 - v2)?,150151 (Val::Num(v1), BinaryOpType::Lt, Val::Num(v2)) => Val::Bool(v1 < v2),152 (Val::Num(v1), BinaryOpType::Gt, Val::Num(v2)) => Val::Bool(v1 > v2),153 (Val::Num(v1), BinaryOpType::Lte, Val::Num(v2)) => Val::Bool(v1 <= v2),154 (Val::Num(v1), BinaryOpType::Gte, Val::Num(v2)) => Val::Bool(v1 >= v2),155156 (Val::Num(v1), BinaryOpType::BitAnd, Val::Num(v2)) => {157 Val::Num(((*v1 as i32) & (*v2 as i32)) as f64)158 }159 (Val::Num(v1), BinaryOpType::BitOr, Val::Num(v2)) => {160 Val::Num(((*v1 as i32) | (*v2 as i32)) as f64)161 }162 (Val::Num(v1), BinaryOpType::BitXor, Val::Num(v2)) => {163 Val::Num(((*v1 as i32) ^ (*v2 as i32)) as f64)164 }165 (Val::Num(v1), BinaryOpType::Lhs, Val::Num(v2)) => {166 if *v2 < 0.0 {167 throw!(RuntimeError("shift by negative exponent".into()))168 }169 Val::Num(((*v1 as i32) << (*v2 as i32)) as f64)170 }171 (Val::Num(v1), BinaryOpType::Rhs, Val::Num(v2)) => {172 if *v2 < 0.0 {173 throw!(RuntimeError("shift by negative exponent".into()))174 }175 Val::Num(((*v1 as i32) >> (*v2 as i32)) as f64)176 }177178 _ => throw!(BinaryOperatorDoesNotOperateOnValues(179 op,180 a.value_type(),181 b.value_type(),182 )),183 })184}185186pub fn evaluate_comp<T>(187 context: Context,188 value: &impl Fn(Context) -> Result<T>,189 specs: &[CompSpec],190) -> Result<Option<Vec<T>>> {191 Ok(match specs.get(0) {192 None => Some(vec![value(context)?]),193 Some(CompSpec::IfSpec(IfSpecData(cond))) => {194 if evaluate(context.clone(), cond)?.try_cast_bool("if spec")? {195 evaluate_comp(context, value, &specs[1..])?196 } else {197 None198 }199 }200 Some(CompSpec::ForSpec(ForSpecData(var, expr))) => match evaluate(context.clone(), expr)? {201 Val::Arr(list) => {202 let mut out = Vec::new();203 for item in list.iter() {204 out.push(evaluate_comp(205 context.clone().with_var(var.clone(), item?.clone()),206 value,207 &specs[1..],208 )?);209 }210 Some(out.into_iter().flatten().flatten().collect())211 }212 _ => throw!(InComprehensionCanOnlyIterateOverArray),213 },214 })215}216217pub fn evaluate_member_list_object(context: Context, members: &[Member]) -> Result<ObjValue> {218 let new_bindings = FutureWrapper::new();219 let future_this = FutureWrapper::new();220 let context_creator = context_creator!(221 closure!(clone context, clone new_bindings, |this: Option<ObjValue>, super_obj: Option<ObjValue>| {222 context.clone().extend_unbound(223 new_bindings.clone().unwrap(),224 context.dollar().clone().or_else(||this.clone()),225 Some(this.unwrap()),226 super_obj227 )228 })229 );230 {231 let mut bindings: HashMap<IStr, LazyBinding> = HashMap::new();232 for (n, b) in members233 .iter()234 .filter_map(|m| match m {235 Member::BindStmt(b) => Some(b.clone()),236 _ => None,237 })238 .map(|b| evaluate_binding(&b, context_creator.clone()))239 {240 bindings.insert(n, b);241 }242 new_bindings.fill(bindings);243 }244245 let mut new_members = FxHashMap::default();246 for member in members.iter() {247 match member {248 Member::Field(FieldMember {249 name,250 plus,251 params: None,252 visibility,253 value,254 }) => {255 let name = evaluate_field_name(context.clone(), name)?;256 if name.is_none() {257 continue;258 }259 let name = name.unwrap();260 new_members.insert(261 name.clone(),262 ObjMember {263 add: *plus,264 visibility: *visibility,265 invoke: LazyBinding::Bindable(Rc::new(266 closure!(clone name, clone value, clone context_creator, |this, super_obj| {267 Ok(LazyVal::new_resolved(evaluate(268 context_creator.0(this, super_obj)?,269 &value,270 )?))271 }),272 )),273 location: value.1.clone(),274 },275 );276 }277 Member::Field(FieldMember {278 name,279 params: Some(params),280 value,281 ..282 }) => {283 let name = evaluate_field_name(context.clone(), name)?;284 if name.is_none() {285 continue;286 }287 let name = name.unwrap();288 new_members.insert(289 name.clone(),290 ObjMember {291 add: false,292 visibility: Visibility::Hidden,293 invoke: LazyBinding::Bindable(Rc::new(294 closure!(clone value, clone context_creator, clone params, clone name, |this, super_obj| {295 296 Ok(LazyVal::new_resolved(evaluate_method(297 context_creator.0(this, super_obj)?,298 name.clone(),299 params.clone(),300 value.clone(),301 )))302 }),303 )),304 location: value.1.clone(),305 },306 );307 }308 Member::BindStmt(_) => {}309 Member::AssertStmt(_) => {}310 }311 }312 let this = ObjValue::new(None, Rc::new(new_members));313 future_this.fill(this.clone());314 Ok(this)315}316317pub fn evaluate_object(context: Context, object: &ObjBody) -> Result<ObjValue> {318 Ok(match object {319 ObjBody::MemberList(members) => evaluate_member_list_object(context, members)?,320 ObjBody::ObjComp(obj) => {321 let future_this = FutureWrapper::new();322 let mut new_members = FxHashMap::default();323 for (k, v) in evaluate_comp(324 context.clone(),325 &|ctx| {326 let new_bindings = FutureWrapper::new();327 let context_creator = context_creator!(328 closure!(clone context, clone new_bindings, |this: Option<ObjValue>, super_obj: Option<ObjValue>| {329 context.clone().extend_unbound(330 new_bindings.clone().unwrap(),331 context.dollar().clone().or_else(||this.clone()),332 None,333 super_obj334 )335 })336 );337 let mut bindings: HashMap<IStr, LazyBinding> = HashMap::new();338 for (n, b) in obj339 .pre_locals340 .iter()341 .chain(obj.post_locals.iter())342 .map(|b| evaluate_binding(b, context_creator.clone()))343 {344 bindings.insert(n, b);345 }346 new_bindings.fill(bindings.clone());347 let ctx = ctx.extend_unbound(bindings, None, None, None)?;348 let key = evaluate(ctx.clone(), &obj.key)?;349 let value = LazyBinding::Bindable(Rc::new(350 closure!(clone ctx, clone obj.value, |this, _super_obj| {351 Ok(LazyVal::new_resolved(evaluate(ctx.clone().extend(FxHashMap::default(), None, this, None), &value)?))352 }),353 ));354355 Ok((key, value))356 },357 &obj.compspecs,358 )?359 .unwrap()360 {361 match k {362 Val::Null => {}363 Val::Str(n) => {364 new_members.insert(365 n,366 ObjMember {367 add: false,368 visibility: Visibility::Normal,369 invoke: v,370 location: obj.value.1.clone(),371 },372 );373 }374 v => throw!(FieldMustBeStringGot(v.value_type())),375 }376 }377378 let this = ObjValue::new(None, Rc::new(new_members));379 future_this.fill(this.clone());380 this381 }382 })383}384385pub fn evaluate_apply(386 context: Context,387 value: &LocExpr,388 args: &ArgsDesc,389 loc: Option<&ExprLocation>,390 tailstrict: bool,391) -> Result<Val> {392 let value = evaluate(context.clone(), value)?;393 Ok(match value {394 Val::Func(f) => {395 let body = || f.evaluate(context, loc, args, tailstrict);396 if tailstrict {397 body()?398 } else {399 push(loc, || format!("function <{}> call", f.name()), body)?400 }401 }402 v => throw!(OnlyFunctionsCanBeCalledGot(v.value_type())),403 })404}405406pub fn evaluate_named(context: Context, lexpr: &LocExpr, name: IStr) -> Result<Val> {407 use Expr::*;408 let LocExpr(expr, _loc) = lexpr;409 Ok(match &**expr {410 Function(params, body) => evaluate_method(context, name, params.clone(), body.clone()),411 _ => evaluate(context, lexpr)?,412 })413}414415pub fn evaluate(context: Context, expr: &LocExpr) -> Result<Val> {416 use Expr::*;417 let LocExpr(expr, loc) = expr;418 Ok(match &**expr {419 Literal(LiteralType::This) => {420 Val::Obj(context.this().clone().ok_or(CantUseSelfOutsideOfObject)?)421 }422 Literal(LiteralType::Super) => Val::Obj(423 context424 .super_obj()425 .clone()426 .ok_or(NoSuperFound)?427 .with_this(context.this().clone().unwrap()),428 ),429 Literal(LiteralType::Dollar) => {430 Val::Obj(context.dollar().clone().ok_or(NoTopLevelObjectFound)?)431 }432 Literal(LiteralType::True) => Val::Bool(true),433 Literal(LiteralType::False) => Val::Bool(false),434 Literal(LiteralType::Null) => Val::Null,435 Parened(e) => evaluate(context, e)?,436 Str(v) => Val::Str(v.clone()),437 Num(v) => Val::new_checked_num(*v)?,438 BinaryOp(v1, o, v2) => evaluate_binary_op_special(context, v1, *o, v2)?,439 UnaryOp(o, v) => evaluate_unary_op(*o, &evaluate(context, v)?)?,440 Var(name) => push(441 loc.as_ref(),442 || format!("variable <{}>", name),443 || context.binding(name.clone())?.evaluate(),444 )?,445 Index(value, index) => {446 match (evaluate(context.clone(), value)?, evaluate(context, index)?) {447 (Val::Obj(v), Val::Str(s)) => {448 let sn = s.clone();449 push(450 loc.as_ref(),451 || format!("field <{}> access", sn),452 || {453 if let Some(v) = v.get(s.clone())? {454 Ok(v)455 } else if v.get("__intrinsic_namespace__".into())?.is_some() {456 Ok(Val::Func(Rc::new(FuncVal::Intrinsic(s))))457 } else {458 throw!(NoSuchField(s))459 }460 },461 )?462 }463 (Val::Obj(_), n) => throw!(ValueIndexMustBeTypeGot(464 ValType::Obj,465 ValType::Str,466 n.value_type(),467 )),468469 (Val::Arr(v), Val::Num(n)) => {470 if n.fract() > f64::EPSILON {471 throw!(FractionalIndex)472 }473 v.get(n as usize)?474 .ok_or_else(|| ArrayBoundsError(n as usize, v.len()))?475 }476 (Val::Arr(_), Val::Str(n)) => throw!(AttemptedIndexAnArrayWithString(n)),477 (Val::Arr(_), n) => throw!(ValueIndexMustBeTypeGot(478 ValType::Arr,479 ValType::Num,480 n.value_type(),481 )),482483 (Val::Str(s), Val::Num(n)) => Val::Str(484 s.chars()485 .skip(n as usize)486 .take(1)487 .collect::<String>()488 .into(),489 ),490 (Val::Str(_), n) => throw!(ValueIndexMustBeTypeGot(491 ValType::Str,492 ValType::Num,493 n.value_type(),494 )),495496 (v, _) => throw!(CantIndexInto(v.value_type())),497 }498 }499 LocalExpr(bindings, returned) => {500 let mut new_bindings: HashMap<IStr, LazyBinding> = HashMap::new();501 let future_context = Context::new_future();502503 let context_creator = context_creator!(504 closure!(clone future_context, |_, _| Ok(future_context.clone().unwrap()))505 );506507 for (k, v) in bindings508 .iter()509 .map(|b| evaluate_binding(b, context_creator.clone()))510 {511 new_bindings.insert(k, v);512 }513514 let context = context515 .extend_unbound(new_bindings, None, None, None)?516 .into_future(future_context);517 evaluate(context, &returned.clone())?518 }519 Arr(items) => {520 let mut out = Vec::with_capacity(items.len());521 for item in items {522 out.push(LazyVal::new(Box::new(523 closure!(clone context, clone item, || {524 evaluate(context.clone(), &item)525 }),526 )));527 }528 Val::Arr(out.into())529 }530 ArrComp(expr, comp_specs) => Val::Arr(531 532 evaluate_comp(context, &|ctx| evaluate(ctx, expr), comp_specs)?533 .unwrap()534 .into(),535 ),536 Obj(body) => Val::Obj(evaluate_object(context, body)?),537 ObjExtend(s, t) => evaluate_add_op(538 &evaluate(context.clone(), s)?,539 &Val::Obj(evaluate_object(context, t)?),540 )?,541 Apply(value, args, tailstrict) => {542 evaluate_apply(context, value, args, loc.as_ref(), *tailstrict)?543 }544 Function(params, body) => {545 evaluate_method(context, "anonymous".into(), params.clone(), body.clone())546 }547 Intrinsic(name) => Val::Func(Rc::new(FuncVal::Intrinsic(name.clone()))),548 AssertExpr(AssertStmt(value, msg), returned) => {549 let assertion_result = push(550 value.1.as_ref(),551 || "assertion condition".to_owned(),552 || {553 evaluate(context.clone(), value)?554 .try_cast_bool("assertion condition should be of type `boolean`")555 },556 )?;557 if assertion_result {558 evaluate(context, returned)?559 } else {560 push(561 value.1.as_ref(),562 || "assertion failure".to_owned(),563 || {564 if let Some(msg) = msg {565 throw!(AssertionFailed(evaluate(context, msg)?.to_string()?));566 } else {567 throw!(AssertionFailed(Val::Null.to_string()?));568 }569 },570 )?571 }572 }573 ErrorStmt(e) => push(574 loc.as_ref(),575 || "error statement".to_owned(),576 || {577 throw!(RuntimeError(578 evaluate(context, e)?.try_cast_str("error text should be of type `string`")?,579 ))580 },581 )?,582 IfElse {583 cond,584 cond_then,585 cond_else,586 } => {587 if push(588 loc.as_ref(),589 || "if condition".to_owned(),590 || evaluate(context.clone(), &cond.0)?.try_cast_bool("in if condition"),591 )? {592 evaluate(context, cond_then)?593 } else {594 match cond_else {595 Some(v) => evaluate(context, v)?,596 None => Val::Null,597 }598 }599 }600 Import(path) => {601 let mut tmp = loc602 .clone()603 .expect("imports cannot be used without loc_data")604 .0;605 let import_location = Rc::make_mut(&mut tmp);606 import_location.pop();607 push(608 loc.as_ref(),609 || format!("import {:?}", path),610 || with_state(|s| s.import_file(import_location, path)),611 )?612 }613 ImportStr(path) => {614 let mut tmp = loc615 .clone()616 .expect("imports cannot be used without loc_data")617 .0;618 let import_location = Rc::make_mut(&mut tmp);619 import_location.pop();620 Val::Str(with_state(|s| s.import_file_str(import_location, path))?)621 }622 })623}