1use std::rc::Rc;23use 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 stdlib::{std_slice, BUILTINS},17 tb, throw,18 typed::Typed,19 val::{ArrValue, CachedUnbound, Thunk, ThunkValue},20 Context, GcHashMap, ObjValue, ObjValueBuilder, ObjectAssertion, Pending, Result, State,21 Unbound, Val,22};23pub mod destructure;24pub mod operator;2526pub fn evaluate_method(ctx: Context, name: IStr, params: ParamsDesc, body: LocExpr) -> Val {27 Val::Func(FuncVal::Normal(Cc::new(FuncDesc {28 name,29 ctx,30 params,31 body,32 })))33}3435pub fn evaluate_field_name(s: State, ctx: Context, field_name: &FieldName) -> Result<Option<IStr>> {36 Ok(match field_name {37 FieldName::Fixed(n) => Some(n.clone()),38 FieldName::Dyn(expr) => s.push(39 CallLocation::new(&expr.1),40 || "evaluating field name".to_string(),41 || {42 let value = evaluate(s.clone(), ctx, expr)?;43 if matches!(value, Val::Null) {44 Ok(None)45 } else {46 Ok(Some(IStr::from_untyped(value, s.clone())?))47 }48 },49 )?,50 })51}5253pub fn evaluate_comp(54 s: State,55 ctx: Context,56 specs: &[CompSpec],57 callback: &mut impl FnMut(Context) -> Result<()>,58) -> Result<()> {59 match specs.get(0) {60 None => callback(ctx)?,61 Some(CompSpec::IfSpec(IfSpecData(cond))) => {62 if bool::from_untyped(evaluate(s.clone(), ctx.clone(), cond)?, s.clone())? {63 evaluate_comp(s, ctx, &specs[1..], callback)?;64 }65 }66 Some(CompSpec::ForSpec(ForSpecData(var, expr))) => {67 match evaluate(s.clone(), ctx.clone(), expr)? {68 Val::Arr(list) => {69 for item in list.iter(s.clone()) {70 evaluate_comp(71 s.clone(),72 ctx.clone().with_var(var.clone(), item?.clone()),73 &specs[1..],74 callback,75 )?;76 }77 }78 _ => throw!(InComprehensionCanOnlyIterateOverArray),79 }80 }81 }82 Ok(())83}8485trait CloneableUnbound<T>: Unbound<Bound = T> + Clone {}8687fn evaluate_object_locals(88 fctx: Pending<Context>,89 locals: Rc<Vec<BindSpec>>,90) -> impl CloneableUnbound<Context> {91 #[derive(Trace, Clone)]92 struct UnboundLocals {93 fctx: Pending<Context>,94 locals: Rc<Vec<BindSpec>>,95 }96 impl CloneableUnbound<Context> for UnboundLocals {}97 impl Unbound for UnboundLocals {98 type Bound = Context;99100 fn bind(101 &self,102 _s: State,103 sup: Option<ObjValue>,104 this: Option<ObjValue>,105 ) -> Result<Context> {106 let fctx = Context::new_future();107 let mut new_bindings = GcHashMap::new();108 for b in self.locals.iter() {109 evaluate_dest(b, fctx.clone(), &mut new_bindings)?;110 }111112 let ctx = self.fctx.unwrap();113 let new_dollar = ctx.dollar().clone().or_else(|| this.clone());114115 let ctx = ctx116 .extend(new_bindings, new_dollar, sup, this)117 .into_future(fctx);118119 Ok(ctx)120 }121 }122123 UnboundLocals { fctx, locals }124}125126#[allow(clippy::too_many_lines)]127pub fn evaluate_member_list_object(s: State, ctx: Context, members: &[Member]) -> Result<ObjValue> {128 let mut builder = ObjValueBuilder::new();129 let locals = Rc::new(130 members131 .iter()132 .filter_map(|m| match m {133 Member::BindStmt(bind) => Some(bind.clone()),134 _ => None,135 })136 .collect::<Vec<_>>(),137 );138139 let fctx = Context::new_future();140141 142 let uctx = CachedUnbound::new(evaluate_object_locals(fctx.clone(), locals));143144 for member in members.iter() {145 match member {146 Member::Field(FieldMember {147 name,148 plus,149 params: None,150 visibility,151 value,152 }) => {153 #[derive(Trace)]154 struct UnboundValue<B> {155 uctx: B,156 value: LocExpr,157 name: IStr,158 }159 impl<B: Unbound<Bound = Context>> Unbound for UnboundValue<B> {160 type Bound = Thunk<Val>;161 fn bind(162 &self,163 s: State,164 sup: Option<ObjValue>,165 this: Option<ObjValue>,166 ) -> Result<Thunk<Val>> {167 Ok(Thunk::evaluated(evaluate_named(168 s.clone(),169 self.uctx.bind(s, sup, this)?,170 &self.value,171 self.name.clone(),172 )?))173 }174 }175176 let name = evaluate_field_name(s.clone(), ctx.clone(), name)?;177 let name = if let Some(name) = name {178 name179 } else {180 continue;181 };182183 builder184 .member(name.clone())185 .with_add(*plus)186 .with_visibility(*visibility)187 .with_location(value.1.clone())188 .bindable(189 s.clone(),190 tb!(UnboundValue {191 uctx: uctx.clone(),192 value: value.clone(),193 name: name.clone()194 }),195 )?;196 }197 Member::Field(FieldMember {198 name,199 params: Some(params),200 value,201 ..202 }) => {203 #[derive(Trace)]204 struct UnboundMethod<B> {205 uctx: B,206 value: LocExpr,207 params: ParamsDesc,208 name: IStr,209 }210 impl<B: Unbound<Bound = Context>> Unbound for UnboundMethod<B> {211 type Bound = Thunk<Val>;212 fn bind(213 &self,214 s: State,215 sup: Option<ObjValue>,216 this: Option<ObjValue>,217 ) -> Result<Thunk<Val>> {218 Ok(Thunk::evaluated(evaluate_method(219 self.uctx.bind(s, sup, this)?,220 self.name.clone(),221 self.params.clone(),222 self.value.clone(),223 )))224 }225 }226227 let name = if let Some(name) = evaluate_field_name(s.clone(), ctx.clone(), name)? {228 name229 } else {230 continue;231 };232233 builder234 .member(name.clone())235 .hide()236 .with_location(value.1.clone())237 .bindable(238 s.clone(),239 tb!(UnboundMethod {240 uctx: uctx.clone(),241 value: value.clone(),242 params: params.clone(),243 name: name.clone()244 }),245 )?;246 }247 Member::BindStmt(_) => {}248 Member::AssertStmt(stmt) => {249 #[derive(Trace)]250 struct ObjectAssert<B> {251 uctx: B,252 assert: AssertStmt,253 }254 impl<B: Unbound<Bound = Context>> ObjectAssertion for ObjectAssert<B> {255 fn run(256 &self,257 s: State,258 sup: Option<ObjValue>,259 this: Option<ObjValue>,260 ) -> Result<()> {261 let ctx = self.uctx.bind(s.clone(), sup, this)?;262 evaluate_assert(s, ctx, &self.assert)263 }264 }265 builder.assert(tb!(ObjectAssert {266 uctx: uctx.clone(),267 assert: stmt.clone(),268 }));269 }270 }271 }272 let this = builder.build();273 let _ctx = ctx274 .extend(GcHashMap::new(), None, None, Some(this.clone()))275 .into_future(fctx);276 Ok(this)277}278279pub fn evaluate_object(s: State, ctx: Context, object: &ObjBody) -> Result<ObjValue> {280 Ok(match object {281 ObjBody::MemberList(members) => evaluate_member_list_object(s, ctx, members)?,282 ObjBody::ObjComp(obj) => {283 let mut builder = ObjValueBuilder::new();284 let locals = Rc::new(285 obj.pre_locals286 .iter()287 .chain(obj.post_locals.iter())288 .cloned()289 .collect::<Vec<_>>(),290 );291 let mut ctxs = vec![];292 evaluate_comp(s.clone(), ctx, &obj.compspecs, &mut |ctx| {293 let key = evaluate(s.clone(), ctx.clone(), &obj.key)?;294 let fctx = Context::new_future();295 ctxs.push((ctx, fctx.clone()));296 let uctx = evaluate_object_locals(fctx, locals.clone());297298 match key {299 Val::Null => {}300 Val::Str(n) => {301 #[derive(Trace)]302 struct UnboundValue<B> {303 uctx: B,304 value: LocExpr,305 }306 impl<B: Unbound<Bound = Context>> Unbound for UnboundValue<B> {307 type Bound = Thunk<Val>;308 fn bind(309 &self,310 s: State,311 sup: Option<ObjValue>,312 this: Option<ObjValue>,313 ) -> Result<Thunk<Val>> {314 Ok(Thunk::evaluated(evaluate(315 s.clone(),316 self.uctx.bind(s, sup, this.clone())?.extend(317 GcHashMap::new(),318 None,319 None,320 this,321 ),322 &self.value,323 )?))324 }325 }326 builder327 .member(n)328 .with_location(obj.value.1.clone())329 .with_add(obj.plus)330 .bindable(331 s.clone(),332 tb!(UnboundValue {333 uctx,334 value: obj.value.clone(),335 }),336 )?;337 }338 v => throw!(FieldMustBeStringGot(v.value_type())),339 }340341 Ok(())342 })?;343344 let this = builder.build();345 for (ctx, fctx) in ctxs {346 let _ctx = ctx347 .extend(GcHashMap::new(), None, None, Some(this.clone()))348 .into_future(fctx);349 }350 this351 }352 })353}354355pub fn evaluate_apply(356 s: State,357 ctx: Context,358 value: &LocExpr,359 args: &ArgsDesc,360 loc: CallLocation,361 tailstrict: bool,362) -> Result<Val> {363 let value = evaluate(s.clone(), ctx.clone(), value)?;364 Ok(match value {365 Val::Func(f) => {366 let body = || f.evaluate(s.clone(), ctx, loc, args, tailstrict);367 if tailstrict {368 body()?369 } else {370 s.push(loc, || format!("function <{}> call", f.name()), body)?371 }372 }373 v => throw!(OnlyFunctionsCanBeCalledGot(v.value_type())),374 })375}376377pub fn evaluate_assert(s: State, ctx: Context, assertion: &AssertStmt) -> Result<()> {378 let value = &assertion.0;379 let msg = &assertion.1;380 let assertion_result = s.push(381 CallLocation::new(&value.1),382 || "assertion condition".to_owned(),383 || bool::from_untyped(evaluate(s.clone(), ctx.clone(), value)?, s.clone()),384 )?;385 if !assertion_result {386 s.push(387 CallLocation::new(&value.1),388 || "assertion failure".to_owned(),389 || {390 if let Some(msg) = msg {391 throw!(AssertionFailed(392 evaluate(s.clone(), ctx, msg)?.to_string(s.clone())?393 ));394 }395 throw!(AssertionFailed(Val::Null.to_string(s.clone())?));396 },397 )?;398 }399 Ok(())400}401402pub fn evaluate_named(s: State, ctx: Context, expr: &LocExpr, name: IStr) -> Result<Val> {403 use Expr::*;404 let LocExpr(raw_expr, _loc) = expr;405 Ok(match &**raw_expr {406 Function(params, body) => evaluate_method(ctx, name, params.clone(), body.clone()),407 _ => evaluate(s, ctx, expr)?,408 })409}410411#[allow(clippy::too_many_lines)]412pub fn evaluate(s: State, ctx: Context, expr: &LocExpr) -> Result<Val> {413 use Expr::*;414 let LocExpr(expr, loc) = expr;415 416 Ok(match &**expr {417 Literal(LiteralType::This) => {418 Val::Obj(ctx.this().clone().ok_or(CantUseSelfOutsideOfObject)?)419 }420 Literal(LiteralType::Super) => Val::Obj(421 ctx.super_obj().clone().ok_or(NoSuperFound)?.with_this(422 ctx.this()423 .clone()424 .expect("if super exists - then this should to"),425 ),426 ),427 Literal(LiteralType::Dollar) => {428 Val::Obj(ctx.dollar().clone().ok_or(NoTopLevelObjectFound)?)429 }430 Literal(LiteralType::True) => Val::Bool(true),431 Literal(LiteralType::False) => Val::Bool(false),432 Literal(LiteralType::Null) => Val::Null,433 Parened(e) => evaluate(s, ctx, e)?,434 Str(v) => Val::Str(v.clone()),435 Num(v) => Val::new_checked_num(*v)?,436 BinaryOp(v1, o, v2) => evaluate_binary_op_special(s, ctx, v1, *o, v2)?,437 UnaryOp(o, v) => evaluate_unary_op(*o, &evaluate(s, ctx, v)?)?,438 Var(name) => s.push(439 CallLocation::new(loc),440 || format!("variable <{}> access", name),441 || ctx.binding(name.clone())?.evaluate(s.clone()),442 )?,443 Index(value, index) => {444 match (445 evaluate(s.clone(), ctx.clone(), value)?,446 evaluate(s.clone(), ctx, index)?,447 ) {448 (Val::Obj(v), Val::Str(key)) => s.push(449 CallLocation::new(loc),450 || format!("field <{}> access", key),451 || match v.get(s.clone(), key.clone()) {452 Ok(Some(v)) => Ok(v),453 Ok(None) => throw!(NoSuchField(key.clone())),454 Err(e) if matches!(e.error(), MagicThisFileUsed) => {455 Ok(Val::Str(loc.0.to_string_lossy().into()))456 }457 Err(e) => Err(e),458 },459 )?,460 (Val::Obj(_), n) => throw!(ValueIndexMustBeTypeGot(461 ValType::Obj,462 ValType::Str,463 n.value_type(),464 )),465466 (Val::Arr(v), Val::Num(n)) => {467 if n.fract() > f64::EPSILON {468 throw!(FractionalIndex)469 }470 v.get(s, n as usize)?471 .ok_or_else(|| ArrayBoundsError(n as usize, v.len()))?472 }473 (Val::Arr(_), Val::Str(n)) => throw!(AttemptedIndexAnArrayWithString(n)),474 (Val::Arr(_), n) => throw!(ValueIndexMustBeTypeGot(475 ValType::Arr,476 ValType::Num,477 n.value_type(),478 )),479480 (Val::Str(s), Val::Num(n)) => Val::Str({481 let v: IStr = s482 .chars()483 .skip(n as usize)484 .take(1)485 .collect::<String>()486 .into();487 if v.is_empty() {488 let size = s.chars().count();489 throw!(StringBoundsError(n as usize, size))490 }491 v492 }),493 (Val::Str(_), n) => throw!(ValueIndexMustBeTypeGot(494 ValType::Str,495 ValType::Num,496 n.value_type(),497 )),498499 (v, _) => throw!(CantIndexInto(v.value_type())),500 }501 }502 LocalExpr(bindings, returned) => {503 let mut new_bindings: GcHashMap<IStr, Thunk<Val>> =504 GcHashMap::with_capacity(bindings.len());505 let fctx = Context::new_future();506 for b in bindings {507 evaluate_dest(b, fctx.clone(), &mut new_bindings)?;508 }509 let ctx = ctx.extend(new_bindings, None, None, None).into_future(fctx);510 evaluate(s, ctx, &returned.clone())?511 }512 Arr(items) => {513 let mut out = Vec::with_capacity(items.len());514 for item in items {515 516 #[derive(Trace)]517 struct ArrayElement {518 ctx: Context,519 item: LocExpr,520 }521 impl ThunkValue for ArrayElement {522 type Output = Val;523 fn get(self: Box<Self>, s: State) -> Result<Val> {524 evaluate(s, self.ctx, &self.item)525 }526 }527 out.push(Thunk::new(tb!(ArrayElement {528 ctx: ctx.clone(),529 item: item.clone(),530 })));531 }532 Val::Arr(out.into())533 }534 ArrComp(expr, comp_specs) => {535 let mut out = Vec::new();536 evaluate_comp(s.clone(), ctx, comp_specs, &mut |ctx| {537 out.push(evaluate(s.clone(), ctx, expr)?);538 Ok(())539 })?;540 Val::Arr(ArrValue::Eager(Cc::new(out)))541 }542 Obj(body) => Val::Obj(evaluate_object(s, ctx, body)?),543 ObjExtend(a, b) => evaluate_add_op(544 s.clone(),545 &evaluate(s.clone(), ctx.clone(), a)?,546 &Val::Obj(evaluate_object(s, ctx, b)?),547 )?,548 Apply(value, args, tailstrict) => {549 evaluate_apply(s, ctx, value, args, CallLocation::new(loc), *tailstrict)?550 }551 Function(params, body) => {552 evaluate_method(ctx, "anonymous".into(), params.clone(), body.clone())553 }554 Intrinsic(name) => Val::Func(FuncVal::StaticBuiltin(555 BUILTINS556 .with(|b| b.get(name).copied())557 .ok_or_else(|| IntrinsicNotFound(name.clone()))?,558 )),559 IntrinsicThisFile => return Err(MagicThisFileUsed.into()),560 IntrinsicId => Val::Func(FuncVal::identity()),561 AssertExpr(assert, returned) => {562 evaluate_assert(s.clone(), ctx.clone(), assert)?;563 evaluate(s, ctx, returned)?564 }565 ErrorStmt(e) => s.push(566 CallLocation::new(loc),567 || "error statement".to_owned(),568 || {569 throw!(RuntimeError(570 evaluate(s.clone(), ctx, e)?.to_string(s.clone())?,571 ))572 },573 )?,574 IfElse {575 cond,576 cond_then,577 cond_else,578 } => {579 if s.push(580 CallLocation::new(loc),581 || "if condition".to_owned(),582 || bool::from_untyped(evaluate(s.clone(), ctx.clone(), &cond.0)?, s.clone()),583 )? {584 evaluate(s, ctx, cond_then)?585 } else {586 match cond_else {587 Some(v) => evaluate(s, ctx, v)?,588 None => Val::Null,589 }590 }591 }592 Slice(value, desc) => {593 fn parse_idx<T: Typed>(594 loc: CallLocation,595 s: State,596 ctx: &Context,597 expr: &Option<LocExpr>,598 desc: &'static str,599 ) -> Result<Option<T>> {600 if let Some(value) = expr {601 Ok(Some(s.push(602 loc,603 || format!("slice {}", desc),604 || T::from_untyped(evaluate(s.clone(), ctx.clone(), value)?, s.clone()),605 )?))606 } else {607 Ok(None)608 }609 }610611 let indexable = evaluate(s.clone(), ctx.clone(), value)?;612 let loc = CallLocation::new(loc);613614 let start = parse_idx(loc, s.clone(), &ctx, &desc.start, "start")?;615 let end = parse_idx(loc, s.clone(), &ctx, &desc.end, "end")?;616 let step = parse_idx(loc, s, &ctx, &desc.step, "step")?;617618 std_slice(indexable.into_indexable()?, start, end, step)?619 }620 Import(path) => {621 let tmp = loc.clone().0;622 let mut import_location = tmp.to_path_buf();623 import_location.pop();624 s.push(625 CallLocation::new(loc),626 || format!("import {:?}", path),627 || s.import_file(&import_location, path),628 )?629 }630 ImportStr(path) => {631 let tmp = loc.clone().0;632 let mut import_location = tmp.to_path_buf();633 import_location.pop();634 Val::Str(s.import_file_str(&import_location, path)?)635 }636 ImportBin(path) => {637 let tmp = loc.clone().0;638 let mut import_location = tmp.to_path_buf();639 import_location.pop();640 let bytes = s.import_file_bin(&import_location, path)?;641 Val::Arr(ArrValue::Bytes(bytes))642 }643 })644}