1use std::{cmp::Ordering, rc::Rc};23use jrsonnet_gcmodule::{Cc, Trace};4use jrsonnet_interner::IStr;5use jrsonnet_parser::{6 ArgsDesc, AssertStmt, BindSpec, CompSpec, Expr, FieldMember, FieldName, ForSpecData,7 IfSpecData, LiteralType, LocExpr, Member, ObjBody, ParamsDesc,8};9use jrsonnet_types::ValType;1011use crate::{12 destructure::evaluate_dest,13 error::Error::*,14 evaluate::operator::{evaluate_add_op, evaluate_binary_op_special, evaluate_unary_op},15 function::{CallLocation, FuncDesc, FuncVal},16 tb, throw,17 typed::Typed,18 val::{ArrValue, CachedUnbound, IndexableVal, Thunk, ThunkValue},19 Context, GcHashMap, ObjValue, ObjValueBuilder, ObjectAssertion, Pending, Result, State,20 Unbound, Val,21};22pub mod destructure;23pub mod operator;2425pub fn evaluate_method(ctx: Context, name: IStr, params: ParamsDesc, body: LocExpr) -> Val {26 Val::Func(FuncVal::Normal(Cc::new(FuncDesc {27 name,28 ctx,29 params,30 body,31 })))32}3334pub fn evaluate_field_name(s: State, ctx: Context, field_name: &FieldName) -> Result<Option<IStr>> {35 Ok(match field_name {36 FieldName::Fixed(n) => Some(n.clone()),37 FieldName::Dyn(expr) => s.push(38 CallLocation::new(&expr.1),39 || "evaluating field name".to_string(),40 || {41 let value = evaluate(s.clone(), ctx, expr)?;42 if matches!(value, Val::Null) {43 Ok(None)44 } else {45 Ok(Some(IStr::from_untyped(value, s.clone())?))46 }47 },48 )?,49 })50}5152pub fn evaluate_comp(53 s: State,54 ctx: Context,55 specs: &[CompSpec],56 callback: &mut impl FnMut(Context) -> Result<()>,57) -> Result<()> {58 match specs.get(0) {59 None => callback(ctx)?,60 Some(CompSpec::IfSpec(IfSpecData(cond))) => {61 if bool::from_untyped(evaluate(s.clone(), ctx.clone(), cond)?, s.clone())? {62 evaluate_comp(s, ctx, &specs[1..], callback)?;63 }64 }65 Some(CompSpec::ForSpec(ForSpecData(var, expr))) => {66 match evaluate(s.clone(), ctx.clone(), expr)? {67 Val::Arr(list) => {68 for item in list.iter(s.clone()) {69 evaluate_comp(70 s.clone(),71 ctx.clone().with_var(var.clone(), item?.clone()),72 &specs[1..],73 callback,74 )?;75 }76 }77 _ => throw!(InComprehensionCanOnlyIterateOverArray),78 }79 }80 }81 Ok(())82}8384trait CloneableUnbound<T>: Unbound<Bound = T> + Clone {}8586fn evaluate_object_locals(87 fctx: Pending<Context>,88 locals: Rc<Vec<BindSpec>>,89) -> impl CloneableUnbound<Context> {90 #[derive(Trace, Clone)]91 struct UnboundLocals {92 fctx: Pending<Context>,93 locals: Rc<Vec<BindSpec>>,94 }95 impl CloneableUnbound<Context> for UnboundLocals {}96 impl Unbound for UnboundLocals {97 type Bound = Context;9899 fn bind(100 &self,101 _s: State,102 sup: Option<ObjValue>,103 this: Option<ObjValue>,104 ) -> Result<Context> {105 let fctx = Context::new_future();106 let mut new_bindings = GcHashMap::new();107 for b in self.locals.iter() {108 evaluate_dest(b, fctx.clone(), &mut new_bindings)?;109 }110111 let ctx = self.fctx.unwrap();112 let new_dollar = ctx.dollar().clone().or_else(|| this.clone());113114 let ctx = ctx115 .extend(new_bindings, new_dollar, sup, this)116 .into_future(fctx);117118 Ok(ctx)119 }120 }121122 UnboundLocals { fctx, locals }123}124125#[allow(clippy::too_many_lines)]126pub fn evaluate_member_list_object(s: State, ctx: Context, members: &[Member]) -> Result<ObjValue> {127 let mut builder = ObjValueBuilder::new();128 let locals = Rc::new(129 members130 .iter()131 .filter_map(|m| match m {132 Member::BindStmt(bind) => Some(bind.clone()),133 _ => None,134 })135 .collect::<Vec<_>>(),136 );137138 let fctx = Context::new_future();139140 141 let uctx = CachedUnbound::new(evaluate_object_locals(fctx.clone(), locals));142143 for member in members.iter() {144 match member {145 Member::Field(FieldMember {146 name,147 plus,148 params: None,149 visibility,150 value,151 }) => {152 #[derive(Trace)]153 struct UnboundValue<B: Trace> {154 uctx: B,155 value: LocExpr,156 name: IStr,157 }158 impl<B: Unbound<Bound = Context>> Unbound for UnboundValue<B> {159 type Bound = Thunk<Val>;160 fn bind(161 &self,162 s: State,163 sup: Option<ObjValue>,164 this: Option<ObjValue>,165 ) -> Result<Thunk<Val>> {166 Ok(Thunk::evaluated(evaluate_named(167 s.clone(),168 self.uctx.bind(s, sup, this)?,169 &self.value,170 self.name.clone(),171 )?))172 }173 }174175 let name = evaluate_field_name(s.clone(), ctx.clone(), name)?;176 let name = if let Some(name) = name {177 name178 } else {179 continue;180 };181182 builder183 .member(name.clone())184 .with_add(*plus)185 .with_visibility(*visibility)186 .with_location(value.1.clone())187 .bindable(188 s.clone(),189 tb!(UnboundValue {190 uctx: uctx.clone(),191 value: value.clone(),192 name: name.clone()193 }),194 )?;195 }196 Member::Field(FieldMember {197 name,198 params: Some(params),199 value,200 ..201 }) => {202 #[derive(Trace)]203 struct UnboundMethod<B: Trace> {204 uctx: B,205 value: LocExpr,206 params: ParamsDesc,207 name: IStr,208 }209 impl<B: Unbound<Bound = Context>> Unbound for UnboundMethod<B> {210 type Bound = Thunk<Val>;211 fn bind(212 &self,213 s: State,214 sup: Option<ObjValue>,215 this: Option<ObjValue>,216 ) -> Result<Thunk<Val>> {217 Ok(Thunk::evaluated(evaluate_method(218 self.uctx.bind(s, sup, this)?,219 self.name.clone(),220 self.params.clone(),221 self.value.clone(),222 )))223 }224 }225226 let name = if let Some(name) = evaluate_field_name(s.clone(), ctx.clone(), name)? {227 name228 } else {229 continue;230 };231232 builder233 .member(name.clone())234 .hide()235 .with_location(value.1.clone())236 .bindable(237 s.clone(),238 tb!(UnboundMethod {239 uctx: uctx.clone(),240 value: value.clone(),241 params: params.clone(),242 name: name.clone()243 }),244 )?;245 }246 Member::BindStmt(_) => {}247 Member::AssertStmt(stmt) => {248 #[derive(Trace)]249 struct ObjectAssert<B: Trace> {250 uctx: B,251 assert: AssertStmt,252 }253 impl<B: Unbound<Bound = Context>> ObjectAssertion for ObjectAssert<B> {254 fn run(255 &self,256 s: State,257 sup: Option<ObjValue>,258 this: Option<ObjValue>,259 ) -> Result<()> {260 let ctx = self.uctx.bind(s.clone(), sup, this)?;261 evaluate_assert(s, ctx, &self.assert)262 }263 }264 builder.assert(tb!(ObjectAssert {265 uctx: uctx.clone(),266 assert: stmt.clone(),267 }));268 }269 }270 }271 let this = builder.build();272 fctx.fill(ctx.extend(GcHashMap::new(), None, None, Some(this.clone())));273 Ok(this)274}275276pub fn evaluate_object(s: State, ctx: Context, object: &ObjBody) -> Result<ObjValue> {277 Ok(match object {278 ObjBody::MemberList(members) => evaluate_member_list_object(s, ctx, members)?,279 ObjBody::ObjComp(obj) => {280 let mut builder = ObjValueBuilder::new();281 let locals = Rc::new(282 obj.pre_locals283 .iter()284 .chain(obj.post_locals.iter())285 .cloned()286 .collect::<Vec<_>>(),287 );288 let mut ctxs = vec![];289 evaluate_comp(s.clone(), ctx, &obj.compspecs, &mut |ctx| {290 let key = evaluate(s.clone(), ctx.clone(), &obj.key)?;291 let fctx = Context::new_future();292 ctxs.push((ctx, fctx.clone()));293 let uctx = evaluate_object_locals(fctx, locals.clone());294295 match key {296 Val::Null => {}297 Val::Str(n) => {298 #[derive(Trace)]299 struct UnboundValue<B: Trace> {300 uctx: B,301 value: LocExpr,302 }303 impl<B: Unbound<Bound = Context>> Unbound for UnboundValue<B> {304 type Bound = Thunk<Val>;305 fn bind(306 &self,307 s: State,308 sup: Option<ObjValue>,309 this: Option<ObjValue>,310 ) -> Result<Thunk<Val>> {311 Ok(Thunk::evaluated(evaluate(312 s.clone(),313 self.uctx.bind(s, sup, this.clone())?.extend(314 GcHashMap::new(),315 None,316 None,317 this,318 ),319 &self.value,320 )?))321 }322 }323 builder324 .member(n)325 .with_location(obj.value.1.clone())326 .with_add(obj.plus)327 .bindable(328 s.clone(),329 tb!(UnboundValue {330 uctx,331 value: obj.value.clone(),332 }),333 )?;334 }335 v => throw!(FieldMustBeStringGot(v.value_type())),336 }337338 Ok(())339 })?;340341 let this = builder.build();342 for (ctx, fctx) in ctxs {343 let _ctx = ctx344 .extend(GcHashMap::new(), None, None, Some(this.clone()))345 .into_future(fctx);346 }347 this348 }349 })350}351352pub fn evaluate_apply(353 s: State,354 ctx: Context,355 value: &LocExpr,356 args: &ArgsDesc,357 loc: CallLocation<'_>,358 tailstrict: bool,359) -> Result<Val> {360 let value = evaluate(s.clone(), ctx.clone(), value)?;361 Ok(match value {362 Val::Func(f) => {363 let body = || f.evaluate(s.clone(), ctx, loc, args, tailstrict);364 if tailstrict {365 body()?366 } else {367 s.push(loc, || format!("function <{}> call", f.name()), body)?368 }369 }370 v => throw!(OnlyFunctionsCanBeCalledGot(v.value_type())),371 })372}373374pub fn evaluate_assert(s: State, ctx: Context, assertion: &AssertStmt) -> Result<()> {375 let value = &assertion.0;376 let msg = &assertion.1;377 let assertion_result = s.push(378 CallLocation::new(&value.1),379 || "assertion condition".to_owned(),380 || bool::from_untyped(evaluate(s.clone(), ctx.clone(), value)?, s.clone()),381 )?;382 if !assertion_result {383 s.push(384 CallLocation::new(&value.1),385 || "assertion failure".to_owned(),386 || {387 if let Some(msg) = msg {388 throw!(AssertionFailed(389 evaluate(s.clone(), ctx, msg)?.to_string(s.clone())?390 ));391 }392 throw!(AssertionFailed(Val::Null.to_string(s.clone())?));393 },394 )?;395 }396 Ok(())397}398399pub fn evaluate_named(s: State, ctx: Context, expr: &LocExpr, name: IStr) -> Result<Val> {400 use Expr::*;401 let LocExpr(raw_expr, _loc) = expr;402 Ok(match &**raw_expr {403 Function(params, body) => evaluate_method(ctx, name, params.clone(), body.clone()),404 _ => evaluate(s, ctx, expr)?,405 })406}407408#[allow(clippy::too_many_lines)]409pub fn evaluate(s: State, ctx: Context, expr: &LocExpr) -> Result<Val> {410 use Expr::*;411 let LocExpr(expr, loc) = expr;412 413 Ok(match &**expr {414 Literal(LiteralType::This) => {415 Val::Obj(ctx.this().clone().ok_or(CantUseSelfOutsideOfObject)?)416 }417 Literal(LiteralType::Super) => Val::Obj(418 ctx.super_obj().clone().ok_or(NoSuperFound)?.with_this(419 ctx.this()420 .clone()421 .expect("if super exists - then this should to"),422 ),423 ),424 Literal(LiteralType::Dollar) => {425 Val::Obj(ctx.dollar().clone().ok_or(NoTopLevelObjectFound)?)426 }427 Literal(LiteralType::True) => Val::Bool(true),428 Literal(LiteralType::False) => Val::Bool(false),429 Literal(LiteralType::Null) => Val::Null,430 Parened(e) => evaluate(s, ctx, e)?,431 Str(v) => Val::Str(v.clone()),432 Num(v) => Val::new_checked_num(*v)?,433 BinaryOp(v1, o, v2) => evaluate_binary_op_special(s, ctx, v1, *o, v2)?,434 UnaryOp(o, v) => evaluate_unary_op(*o, &evaluate(s, ctx, v)?)?,435 Var(name) => s.push(436 CallLocation::new(loc),437 || format!("variable <{name}> access"),438 || ctx.binding(name.clone())?.evaluate(s.clone()),439 )?,440 Index(value, index) => {441 match (442 evaluate(s.clone(), ctx.clone(), value)?,443 evaluate(s.clone(), ctx, index)?,444 ) {445 (Val::Obj(v), Val::Str(key)) => s.push(446 CallLocation::new(loc),447 || format!("field <{key}> access"),448 || match v.get(s.clone(), key.clone()) {449 Ok(Some(v)) => Ok(v),450 #[cfg(not(feature = "friendly-errors"))]451 Ok(None) => throw!(NoSuchField(key.clone(), vec![])),452 #[cfg(feature = "friendly-errors")]453 Ok(None) => {454 let mut heap = Vec::new();455 for field in v.fields_ex(456 true,457 #[cfg(feature = "exp-preserve-order")]458 false,459 ) {460 let conf = strsim::jaro_winkler(&field as &str, &key as &str);461 if conf < 0.8 {462 continue;463 }464 heap.push((conf, field));465 }466 heap.sort_by(|a, b| b.0.partial_cmp(&a.0).unwrap_or(Ordering::Equal));467468 throw!(NoSuchField(469 key.clone(),470 heap.into_iter().map(|(_, v)| v).collect()471 ))472 }473 Err(e) => Err(e),474 },475 )?,476 (Val::Obj(_), n) => throw!(ValueIndexMustBeTypeGot(477 ValType::Obj,478 ValType::Str,479 n.value_type(),480 )),481482 (Val::Arr(v), Val::Num(n)) => {483 if n.fract() > f64::EPSILON {484 throw!(FractionalIndex)485 }486 v.get(s, n as usize)?487 .ok_or_else(|| ArrayBoundsError(n as usize, v.len()))?488 }489 (Val::Arr(_), Val::Str(n)) => throw!(AttemptedIndexAnArrayWithString(n)),490 (Val::Arr(_), n) => throw!(ValueIndexMustBeTypeGot(491 ValType::Arr,492 ValType::Num,493 n.value_type(),494 )),495496 (Val::Str(s), Val::Num(n)) => Val::Str({497 let v: IStr = s498 .chars()499 .skip(n as usize)500 .take(1)501 .collect::<String>()502 .into();503 if v.is_empty() {504 let size = s.chars().count();505 throw!(StringBoundsError(n as usize, size))506 }507 v508 }),509 (Val::Str(_), n) => throw!(ValueIndexMustBeTypeGot(510 ValType::Str,511 ValType::Num,512 n.value_type(),513 )),514515 (v, _) => throw!(CantIndexInto(v.value_type())),516 }517 }518 LocalExpr(bindings, returned) => {519 let mut new_bindings: GcHashMap<IStr, Thunk<Val>> =520 GcHashMap::with_capacity(bindings.len());521 let fctx = Context::new_future();522 for b in bindings {523 evaluate_dest(b, fctx.clone(), &mut new_bindings)?;524 }525 let ctx = ctx.extend(new_bindings, None, None, None).into_future(fctx);526 evaluate(s, ctx, &returned.clone())?527 }528 Arr(items) => {529 let mut out = Vec::with_capacity(items.len());530 for item in items {531 532 #[derive(Trace)]533 struct ArrayElement {534 ctx: Context,535 item: LocExpr,536 }537 impl ThunkValue for ArrayElement {538 type Output = Val;539 fn get(self: Box<Self>, s: State) -> Result<Val> {540 evaluate(s, self.ctx, &self.item)541 }542 }543 out.push(Thunk::new(tb!(ArrayElement {544 ctx: ctx.clone(),545 item: item.clone(),546 })));547 }548 Val::Arr(out.into())549 }550 ArrComp(expr, comp_specs) => {551 let mut out = Vec::new();552 evaluate_comp(s.clone(), ctx, comp_specs, &mut |ctx| {553 out.push(evaluate(s.clone(), ctx, expr)?);554 Ok(())555 })?;556 Val::Arr(ArrValue::Eager(Cc::new(out)))557 }558 Obj(body) => Val::Obj(evaluate_object(s, ctx, body)?),559 ObjExtend(a, b) => evaluate_add_op(560 s.clone(),561 &evaluate(s.clone(), ctx.clone(), a)?,562 &Val::Obj(evaluate_object(s, ctx, b)?),563 )?,564 Apply(value, args, tailstrict) => {565 evaluate_apply(s, ctx, value, args, CallLocation::new(loc), *tailstrict)?566 }567 Function(params, body) => {568 evaluate_method(ctx, "anonymous".into(), params.clone(), body.clone())569 }570 AssertExpr(assert, returned) => {571 evaluate_assert(s.clone(), ctx.clone(), assert)?;572 evaluate(s, ctx, returned)?573 }574 ErrorStmt(e) => s.push(575 CallLocation::new(loc),576 || "error statement".to_owned(),577 || {578 throw!(RuntimeError(579 evaluate(s.clone(), ctx, e)?.to_string(s.clone())?,580 ))581 },582 )?,583 IfElse {584 cond,585 cond_then,586 cond_else,587 } => {588 if s.push(589 CallLocation::new(loc),590 || "if condition".to_owned(),591 || bool::from_untyped(evaluate(s.clone(), ctx.clone(), &cond.0)?, s.clone()),592 )? {593 evaluate(s, ctx, cond_then)?594 } else {595 match cond_else {596 Some(v) => evaluate(s, ctx, v)?,597 None => Val::Null,598 }599 }600 }601 Slice(value, desc) => {602 fn parse_idx<T: Typed>(603 loc: CallLocation<'_>,604 s: State,605 ctx: &Context,606 expr: &Option<LocExpr>,607 desc: &'static str,608 ) -> Result<Option<T>> {609 if let Some(value) = expr {610 Ok(Some(s.push(611 loc,612 || format!("slice {desc}"),613 || T::from_untyped(evaluate(s.clone(), ctx.clone(), value)?, s.clone()),614 )?))615 } else {616 Ok(None)617 }618 }619620 let indexable = evaluate(s.clone(), ctx.clone(), value)?;621 let loc = CallLocation::new(loc);622623 let start = parse_idx(loc, s.clone(), &ctx, &desc.start, "start")?;624 let end = parse_idx(loc, s.clone(), &ctx, &desc.end, "end")?;625 let step = parse_idx(loc, s.clone(), &ctx, &desc.step, "step")?;626627 IndexableVal::into_untyped(indexable.into_indexable()?.slice(start, end, step)?, s)?628 }629 i @ (Import(path) | ImportStr(path) | ImportBin(path)) => {630 let tmp = loc.clone().0;631 let resolved_path = s.resolve_from(tmp.source_path(), path as &str)?;632 match i {633 Import(_) => s.push(634 CallLocation::new(loc),635 || format!("import {:?}", path.clone()),636 || s.import_resolved(resolved_path),637 )?,638 ImportStr(_) => Val::Str(s.import_resolved_str(resolved_path)?),639 ImportBin(_) => Val::Arr(ArrValue::Bytes(s.import_resolved_bin(resolved_path)?)),640 _ => unreachable!(),641 }642 }643 })644}