1use crate::{2 context_creator, create_error, future_wrapper, lazy_val, push, with_state, Context,3 ContextCreator, Error, FuncDesc, LazyBinding, LazyVal, ObjMember, ObjValue, Result, Val,4 ValType,5};6use closure::closure;7use jsonnet_parser::{8 el, Arg, ArgsDesc, AssertStmt, BinaryOpType, BindSpec, CompSpec, Expr, FieldMember,9 ForSpecData, IfSpecData, LiteralType, LocExpr, Member, ObjBody, ParamsDesc, UnaryOpType,10 Visibility,11};12use std::{13 collections::{BTreeMap, HashMap},14 rc::Rc,15};1617pub fn evaluate_binding(b: &BindSpec, context_creator: ContextCreator) -> (String, LazyBinding) {18 let b = b.clone();19 if let Some(params) = &b.params {20 let params = params.clone();21 (22 b.name.clone(),23 LazyBinding::Bindable(Rc::new(move |this, super_obj| {24 Ok(lazy_val!(25 closure!(clone b, clone params, clone context_creator, || Ok(evaluate_method(26 context_creator.0(this.clone(), super_obj.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 push(b.value.clone(), "thunk".to_owned(), ||{39 evaluate(40 context_creator.0(this.clone(), super_obj.clone())?,41 &b.value42 )43 })44 )))45 })),46 )47 }48}4950pub fn evaluate_method(ctx: Context, params: ParamsDesc, body: LocExpr) -> Val {51 Val::Func(FuncDesc { ctx, params, body })52}5354pub fn evaluate_field_name(55 context: Context,56 field_name: &jsonnet_parser::FieldName,57) -> Result<Option<String>> {58 Ok(match field_name {59 jsonnet_parser::FieldName::Fixed(n) => Some(n.clone()),60 jsonnet_parser::FieldName::Dyn(expr) => {61 let value = evaluate(context, expr)?.unwrap_if_lazy()?;62 if matches!(value, Val::Null) {63 None64 } else {65 Some(value.try_cast_str("dynamic field name")?)66 }67 }68 })69}7071pub fn evaluate_unary_op(op: UnaryOpType, b: &Val) -> Result<Val> {72 Ok(match (op, b) {73 (o, Val::Lazy(l)) => evaluate_unary_op(o, &l.evaluate()?)?,74 (UnaryOpType::Not, Val::Bool(v)) => Val::Bool(!v),75 (UnaryOpType::Minus, Val::Num(n)) => Val::Num(-*n),76 (UnaryOpType::BitNot, Val::Num(n)) => Val::Num(!(*n as i32) as f64),77 (op, o) => panic!("unary op not implemented: {:?} {:?}", op, o),78 })79}8081pub(crate) fn evaluate_add_op(a: &Val, b: &Val) -> Result<Val> {82 Ok(match (a, b) {83 (Val::Str(v1), Val::Str(v2)) => Val::Str(v1.to_owned() + &v2),8485 86 (Val::Num(n), Val::Str(o)) => Val::Str(format!("{}{}", n, o)),87 (Val::Str(o), Val::Num(n)) => Val::Str(format!("{}{}", o, n)),8889 (Val::Str(s), o) => Val::Str(format!("{}{}", s, o.clone().into_json(0)?)),90 (o, Val::Str(s)) => Val::Str(format!("{}{}", o.clone().into_json(0)?, s)),9192 (Val::Obj(v1), Val::Obj(v2)) => Val::Obj(v2.with_super(v1.clone())),93 (Val::Arr(a), Val::Arr(b)) => Val::Arr([&a[..], &b[..]].concat()),94 (Val::Num(v1), Val::Num(v2)) => Val::Num(v1 + v2),95 _ => panic!("can't add: {:?} and {:?}", a, b),96 })97}9899pub fn evaluate_binary_op_special(100 context: Context,101 a: &LocExpr,102 op: BinaryOpType,103 b: &LocExpr,104) -> Result<Val> {105 Ok(106 match (evaluate(context.clone(), &a)?.unwrap_if_lazy()?, op, b) {107 (Val::Bool(true), BinaryOpType::Or, _o) => Val::Bool(true),108 (Val::Bool(false), BinaryOpType::And, _o) => Val::Bool(false),109 (a, op, eb) => {110 evaluate_binary_op_normal(&a, op, &evaluate(context, eb)?.unwrap_if_lazy()?)?111 }112 },113 )114}115116pub fn evaluate_binary_op_normal(a: &Val, op: BinaryOpType, b: &Val) -> Result<Val> {117 Ok(match (a, op, b) {118 (a, BinaryOpType::Add, b) => evaluate_add_op(a, b)?,119120 (Val::Str(v1), BinaryOpType::Mul, Val::Num(v2)) => Val::Str(v1.repeat(*v2 as usize)),121122 123 (Val::Bool(a), BinaryOpType::And, Val::Bool(b)) => Val::Bool(*a && *b),124 (Val::Bool(a), BinaryOpType::Or, Val::Bool(b)) => Val::Bool(*a || *b),125126 127 (Val::Str(v1), BinaryOpType::Lt, Val::Str(v2)) => Val::Bool(v1 < v2),128 (Val::Str(v1), BinaryOpType::Gt, Val::Str(v2)) => Val::Bool(v1 > v2),129 (Val::Str(v1), BinaryOpType::Lte, Val::Str(v2)) => Val::Bool(v1 <= v2),130 (Val::Str(v1), BinaryOpType::Gte, Val::Str(v2)) => Val::Bool(v1 >= v2),131132 133 (Val::Num(v1), BinaryOpType::Mul, Val::Num(v2)) => Val::Num(v1 * v2),134 (Val::Num(v1), BinaryOpType::Div, Val::Num(v2)) => {135 if *v2 <= f64::EPSILON {136 create_error(crate::Error::DivisionByZero)?137 }138 Val::Num(v1 / v2)139 }140141 (Val::Num(v1), BinaryOpType::Sub, Val::Num(v2)) => Val::Num(v1 - v2),142143 (Val::Num(v1), BinaryOpType::Lt, Val::Num(v2)) => Val::Bool(v1 < v2),144 (Val::Num(v1), BinaryOpType::Gt, Val::Num(v2)) => Val::Bool(v1 > v2),145 (Val::Num(v1), BinaryOpType::Lte, Val::Num(v2)) => Val::Bool(v1 <= v2),146 (Val::Num(v1), BinaryOpType::Gte, Val::Num(v2)) => Val::Bool(v1 >= v2),147148 (Val::Num(v1), BinaryOpType::BitAnd, Val::Num(v2)) => {149 Val::Num(((*v1 as i32) & (*v2 as i32)) as f64)150 }151 (Val::Num(v1), BinaryOpType::BitOr, Val::Num(v2)) => {152 Val::Num(((*v1 as i32) | (*v2 as i32)) as f64)153 }154 (Val::Num(v1), BinaryOpType::BitXor, Val::Num(v2)) => {155 Val::Num(((*v1 as i32) ^ (*v2 as i32)) as f64)156 }157 (Val::Num(v1), BinaryOpType::Lhs, Val::Num(v2)) => {158 Val::Num(((*v1 as i32) << (*v2 as i32)) as f64)159 }160 (Val::Num(v1), BinaryOpType::Rhs, Val::Num(v2)) => {161 Val::Num(((*v1 as i32) >> (*v2 as i32)) as f64)162 }163164 _ => panic!("no rules for binary operation: {:?} {:?} {:?}", a, op, b),165 })166}167168future_wrapper!(HashMap<String, LazyBinding>, FutureNewBindings);169future_wrapper!(ObjValue, FutureObjValue);170171pub fn evaluate_comp<T>(172 context: Context,173 value: &impl Fn(Context) -> Result<T>,174 specs: &[CompSpec],175) -> Result<Option<Vec<T>>> {176 Ok(match specs.get(0) {177 None => Some(vec![value(context)?]),178 Some(CompSpec::IfSpec(IfSpecData(cond))) => {179 if evaluate(context.clone(), &cond)?.try_cast_bool("if spec")? {180 evaluate_comp(context, value, &specs[1..])?181 } else {182 None183 }184 }185 Some(CompSpec::ForSpec(ForSpecData(var, expr))) => {186 match evaluate(context.clone(), &expr)?.unwrap_if_lazy()? {187 Val::Arr(list) => {188 let mut out = Vec::new();189 for item in list {190 let item = item.clone().unwrap_if_lazy()?;191 out.push(evaluate_comp(192 context.with_var(var.clone(), item)?,193 value,194 &specs[1..],195 )?);196 }197 Some(out.into_iter().flatten().flatten().collect())198 }199 _ => panic!("for expression evaluated to non-iterable value"),200 }201 }202 })203}204205206pub fn evaluate_object(context: Context, object: ObjBody) -> Result<ObjValue> {207 Ok(match object {208 ObjBody::MemberList(members) => {209 let new_bindings = FutureNewBindings::new();210 let future_this = FutureObjValue::new();211 let context_creator = context_creator!(212 closure!(clone context, clone new_bindings, |this: Option<ObjValue>, super_obj: Option<ObjValue>| {213 Ok(context.extend_unbound(214 new_bindings.clone().unwrap(),215 context.dollar().clone().or_else(||this.clone()),216 Some(this.unwrap()),217 super_obj218 )?)219 })220 );221 {222 let mut bindings: HashMap<String, LazyBinding> = HashMap::new();223 for (n, b) in members224 .iter()225 .filter_map(|m| match m {226 Member::BindStmt(b) => Some(b.clone()),227 _ => None,228 })229 .map(|b| evaluate_binding(&b, context_creator.clone()))230 {231 bindings.insert(n, b);232 }233 new_bindings.fill(bindings);234 }235236 let mut new_members = BTreeMap::new();237 for member in members.into_iter() {238 match member {239 Member::Field(FieldMember {240 name,241 plus,242 params: None,243 visibility,244 value,245 }) => {246 let name = evaluate_field_name(context.clone(), &name)?;247 if name.is_none() {248 continue;249 }250 let name = name.unwrap();251 new_members.insert(252 name.clone(),253 ObjMember {254 add: plus,255 visibility: visibility.clone(),256 invoke: LazyBinding::Bindable(Rc::new(257 closure!(clone name, clone value, clone context_creator, |this, super_obj| {258 Ok(LazyVal::new_resolved(push(value.clone(), "object ".to_owned()+&name+" field", ||{259 let context = context_creator.0(this, super_obj)?;260 evaluate(261 context,262 &value,263 )?.unwrap_if_lazy()264 })?))265 }),266 )),267 },268 );269 }270 Member::Field(FieldMember {271 name,272 params: Some(params),273 value,274 ..275 }) => {276 let name = evaluate_field_name(context.clone(), &name)?;277 if name.is_none() {278 continue;279 }280 let name = name.unwrap();281 new_members.insert(282 name,283 ObjMember {284 add: false,285 visibility: Visibility::Hidden,286 invoke: LazyBinding::Bindable(Rc::new(287 closure!(clone value, clone context_creator, |this, super_obj| {288 289 Ok(LazyVal::new_resolved(evaluate_method(290 context_creator.0(this, super_obj)?,291 params.clone(),292 value.clone(),293 )))294 }),295 )),296 },297 );298 }299 Member::BindStmt(_) => {}300 Member::AssertStmt(_) => {}301 }302 }303 future_this.fill(ObjValue::new(None, Rc::new(new_members)))304 }305 ObjBody::ObjComp {306 pre_locals,307 key,308 value,309 post_locals,310 compspecs,311 } => {312 let future_this = FutureObjValue::new();313 let mut new_members = BTreeMap::new();314 for (k, v) in evaluate_comp(315 context.clone(),316 &|ctx| {317 let new_bindings = FutureNewBindings::new();318 let context_creator = context_creator!(319 closure!(clone context, clone new_bindings, |this: Option<ObjValue>, super_obj: Option<ObjValue>| {320 Ok(context.extend_unbound(321 new_bindings.clone().unwrap(),322 context.dollar().clone().or_else(||this.clone()),323 None,324 super_obj325 )?)326 })327 );328 let mut bindings: HashMap<String, LazyBinding> = HashMap::new();329 for (n, b) in pre_locals330 .iter()331 .chain(post_locals.iter())332 .map(|b| evaluate_binding(b, context_creator.clone()))333 {334 bindings.insert(n, b);335 }336 let bindings = new_bindings.fill(bindings);337 let ctx = ctx.extend_unbound(bindings, None, None, None)?;338 let key = evaluate(ctx.clone(), &key)?;339 let value = LazyBinding::Bindable(Rc::new(340 closure!(clone ctx, clone value, |this, _super_obj| {341 Ok(LazyVal::new_resolved(evaluate(ctx.extend(HashMap::new(), None, this, None)?, &value)?))342 }),343 ));344345 Ok((key, value))346 },347 &compspecs,348 )?349 .unwrap()350 {351 match k {352 Val::Null => {}353 Val::Str(n) => {354 new_members.insert(355 n,356 ObjMember {357 add: false,358 visibility: Visibility::Normal,359 invoke: v,360 },361 );362 }363 v => create_error(Error::FieldMustBeStringGot(v.value_type()?))?,364 }365 }366367 future_this.fill(ObjValue::new(None, Rc::new(new_members)))368 }369 })370}371372pub fn evaluate(context: Context, expr: &LocExpr) -> Result<Val> {373 use Expr::*;374 let locexpr = expr.clone();375 let LocExpr(expr, loc) = expr;376 Ok(match &**expr {377 Literal(LiteralType::This) => Val::Obj(378 context379 .this()380 .clone()381 .unwrap_or_else(|| panic!("this not found")),382 ),383 Literal(LiteralType::Dollar) => Val::Obj(384 context385 .dollar()386 .clone()387 .unwrap_or_else(|| panic!("dollar not found")),388 ),389 Literal(LiteralType::True) => Val::Bool(true),390 Literal(LiteralType::False) => Val::Bool(false),391 Literal(LiteralType::Null) => Val::Null,392 Parened(e) => evaluate(context, e)?,393 Str(v) => Val::Str(v.clone()),394 Num(v) => Val::Num(*v),395 BinaryOp(v1, o, v2) => evaluate_binary_op_special(context, &v1, *o, &v2)?,396 UnaryOp(o, v) => evaluate_unary_op(*o, &evaluate(context, v)?)?,397 Var(name) => push(locexpr, "var".to_owned(), || {398 Val::Lazy(context.binding(&name)?).unwrap_if_lazy()399 })?,400 Index(LocExpr(v, _), index) if matches!(&**v, Expr::Literal(LiteralType::Super)) => {401 let name = evaluate(context.clone(), index)?.try_cast_str("object index")?;402 context403 .super_obj()404 .clone()405 .expect("no super found")406 .get_raw(&name, &context.this().clone().expect("no this found"))?407 .expect("value not found")408 }409 Index(value, index) => {410 match (411 evaluate(context.clone(), value)?.unwrap_if_lazy()?,412 evaluate(context, index)?,413 ) {414 (Val::Obj(v), Val::Str(s)) => {415 if let Some(v) = v.get(&s)? {416 v.unwrap_if_lazy()?417 } else if let Some(Val::Str(n)) = v.get("__intristic_namespace__")? {418 Val::Intristic(n, s)419 } else {420 create_error(crate::Error::NoSuchField(s))?421 }422 }423 (Val::Obj(_), n) => create_error(crate::Error::ValueIndexMustBeTypeGot(424 ValType::Obj,425 ValType::Str,426 n.value_type()?,427 ))?,428429 (Val::Arr(v), Val::Num(n)) => {430 if n.fract() > f64::EPSILON {431 create_error(crate::Error::FractionalIndex)?432 }433 v.get(n as usize)434 .unwrap_or_else(|| panic!("out of bounds"))435 .clone()436 .unwrap_if_lazy()?437 }438 (Val::Arr(_), Val::Str(n)) => {439 create_error(crate::Error::AttemptedIndexAnArrayWithString(n))?440 }441 (Val::Arr(_), n) => create_error(crate::Error::ValueIndexMustBeTypeGot(442 ValType::Arr,443 ValType::Num,444 n.value_type()?,445 ))?,446447 (Val::Str(s), Val::Num(n)) => {448 Val::Str(s.chars().skip(n as usize).take(1).collect())449 }450 (Val::Str(_), n) => create_error(crate::Error::ValueIndexMustBeTypeGot(451 ValType::Str,452 ValType::Num,453 n.value_type()?,454 ))?,455456 (v, _) => create_error(crate::Error::CantIndexInto(v.value_type()?))?,457 }458 }459 LocalExpr(bindings, returned) => {460 let mut new_bindings: HashMap<String, LazyBinding> = HashMap::new();461 let future_context = Context::new_future();462463 let context_creator = context_creator!(464 closure!(clone future_context, |_, _| Ok(future_context.clone().unwrap()))465 );466467 for (k, v) in bindings468 .iter()469 .map(|b| evaluate_binding(b, context_creator.clone()))470 {471 new_bindings.insert(k, v);472 }473474 let context = context475 .extend_unbound(new_bindings, None, None, None)?476 .into_future(future_context);477 evaluate(context, &returned.clone())?478 }479 Arr(items) => {480 let mut out = Vec::with_capacity(items.len());481 for item in items {482 out.push(Val::Lazy(lazy_val!(483 closure!(clone context, clone item, || {484 evaluate(context.clone(), &item)485 })486 )));487 }488 Val::Arr(out)489 }490 ArrComp(expr, compspecs) => Val::Arr(491 492 evaluate_comp(context, &|ctx| evaluate(ctx, expr), compspecs)?.unwrap(),493 ),494 Obj(body) => Val::Obj(evaluate_object(context, body.clone())?),495 ObjExtend(s, t) => evaluate_add_op(496 &evaluate(context.clone(), s)?,497 &Val::Obj(evaluate_object(context, t.clone())?),498 )?,499 Apply(value, args, tailstrict) => {500 let value = evaluate(context.clone(), value)?.unwrap_if_lazy()?;501 match value {502 Val::Intristic(ns, name) => match (&ns as &str, &name as &str) {503 504 ("std", "length") => {505 assert_eq!(args.len(), 1);506 let expr = &args.get(0).unwrap().1;507 match evaluate(context, expr)? {508 Val::Str(n) => Val::Num(n.chars().count() as f64),509 Val::Arr(i) => Val::Num(i.len() as f64),510 Val::Obj(o) => Val::Num(511 o.fields_visibility()512 .into_iter()513 .filter(|(_k, v)| *v)514 .count() as f64,515 ),516 v => panic!("can't get length of {:?}", v),517 }518 }519 520 ("std", "type") => {521 assert_eq!(args.len(), 1);522 let expr = &args.get(0).unwrap().1;523 Val::Str(evaluate(context, expr)?.value_type()?.name().to_owned())524 }525 526 ("std", "makeArray") => {527 assert_eq!(args.len(), 2);528 if let (Val::Num(v), Val::Func(d)) = (529 evaluate(context.clone(), &args[0].1)?,530 evaluate(context, &args[1].1)?,531 ) {532 assert!(v >= 0.0);533 let mut out = Vec::with_capacity(v as usize);534 for i in 0..v as usize {535 let call_ctx =536 Context::new().with_var("v".to_owned(), Val::Num(i as f64))?;537 out.push(d.evaluate(538 call_ctx,539 &ArgsDesc(vec![Arg(None, el!(Expr::Var("v".to_owned())))]),540 true,541 )?)542 }543 Val::Arr(out)544 } else {545 panic!("bad makeArray call");546 }547 }548 549 ("std", "codepoint") => {550 assert_eq!(args.len(), 1);551 if let Val::Str(s) = evaluate(context, &args[0].1)? {552 assert!(553 s.chars().count() == 1,554 "std.codepoint should receive single char string"555 );556 Val::Num(s.chars().take(1).next().unwrap() as u32 as f64)557 } else {558 panic!("bad codepoint call");559 }560 }561 562 ("std", "objectFieldsEx") => {563 assert_eq!(args.len(), 2);564 if let (Val::Obj(body), Val::Bool(include_hidden)) = (565 evaluate(context.clone(), &args[0].1)?,566 evaluate(context, &args[1].1)?,567 ) {568 Val::Arr(569 body.fields_visibility()570 .into_iter()571 .filter(|(_k, v)| *v || include_hidden)572 .map(|(k, _v)| Val::Str(k))573 .collect(),574 )575 } else {576 panic!("bad objectFieldsEx call");577 }578 }579 580 ("std", "objectHasEx") => {581 assert_eq!(args.len(), 3);582 if let (Val::Obj(body), Val::Str(name), Val::Bool(include_hidden)) = (583 evaluate(context.clone(), &args[0].1)?,584 evaluate(context.clone(), &args[1].1)?,585 evaluate(context, &args[2].1)?,586 ) {587 Val::Bool(588 body.fields_visibility()589 .into_iter()590 .filter(|(_k, v)| *v || include_hidden)591 .any(|(k, _v)| k == name),592 )593 } else {594 panic!("bad objectHasEx call");595 }596 }597 ("std", "primitiveEquals") => {598 assert_eq!(args.len(), 2);599 let (a, b) = (600 evaluate(context.clone(), &args[0].1)?,601 evaluate(context, &args[1].1)?,602 );603 Val::Bool(a == b)604 }605 ("std", "modulo") => {606 assert_eq!(args.len(), 2);607 if let (Val::Num(a), Val::Num(b)) = (608 evaluate(context.clone(), &args[0].1)?,609 evaluate(context, &args[1].1)?,610 ) {611 Val::Num(a % b)612 } else {613 panic!("bad modulo call");614 }615 }616 ("std", "floor") => {617 assert_eq!(args.len(), 1);618 if let Val::Num(a) = evaluate(context, &args[0].1)? {619 Val::Num(a.floor())620 } else {621 panic!("bad floor call");622 }623 }624 ("std", "trace") => {625 assert_eq!(args.len(), 2);626 if let (Val::Str(a), b) = (627 evaluate(context.clone(), &args[0].1)?,628 evaluate(context, &args[1].1)?,629 ) {630 631 println!("TRACE: {}", a);632 b633 } else {634 panic!("bad trace call");635 }636 }637 ("std", "pow") => {638 assert_eq!(args.len(), 2);639 if let (Val::Num(a), Val::Num(b)) = (640 evaluate(context.clone(), &args[0].1)?,641 evaluate(context, &args[1].1)?,642 ) {643 Val::Num(a.powf(b))644 } else {645 panic!("bad pow call");646 }647 }648 ("std", "extVar") => {649 assert_eq!(args.len(), 1);650 if let Val::Str(a) = evaluate(context, &args[0].1)? {651 with_state(|s| s.0.ext_vars.borrow().get(&a).cloned()).ok_or_else(652 || {653 create_error::<()>(crate::Error::UndefinedExternalVariable(a))654 .err()655 .unwrap()656 },657 )?658 } else {659 panic!("bad extVar call");660 }661 }662 ("std", "filter") => {663 assert_eq!(args.len(), 2);664 if let (Val::Func(predicate), Val::Arr(arr)) = (665 evaluate(context.clone(), &args[0].1)?,666 evaluate(context.clone(), &args[1].1)?,667 ) {668 Val::Arr(669 arr.into_iter()670 .filter(|e| {671 predicate672 .evaluate_values(context.clone(), &[e.clone()])673 .unwrap()674 .try_cast_bool("filter predicate")675 .unwrap()676 })677 .collect(),678 )679 } else {680 panic!("bad filter call");681 }682 }683 684 ("std", "join") => {685 assert_eq!(args.len(), 2);686 let joiner = evaluate(context.clone(), &args[0].1)?.unwrap_if_lazy()?;687 let items = evaluate(context, &args[1].1)?.unwrap_if_lazy()?;688 match (joiner, items) {689 (Val::Arr(joiner_items), Val::Arr(items)) => {690 691 let mut out = Vec::new();692693 let mut first = true;694 for item in items {695 if let Val::Arr(items) = item.unwrap_if_lazy()? {696 if !first {697 out.extend(joiner_items.iter().cloned());698 }699 first = false;700 out.extend(items);701 } else {702 panic!("all array items should be arrays")703 }704 }705706 Val::Arr(out)707 }708 (Val::Str(joiner), Val::Arr(items)) => {709 let mut out = String::new();710711 let mut first = true;712 for item in items {713 if let Val::Str(item) = item.unwrap_if_lazy()? {714 if !first {715 out += &joiner;716 }717 first = false;718 out += &item;719 } else {720 panic!("all array items should be strings")721 }722 }723724 Val::Str(out)725 }726 (joiner, items) => panic!("bad join call: {:?} {:?}", joiner, items),727 }728 }729 (ns, name) => panic!("Intristic not found: {}.{}", ns, name),730 },731 Val::Func(f) => {732 let body = || f.evaluate(context, args, *tailstrict);733 if *tailstrict {734 body()?735 } else {736 push(locexpr, "function call".to_owned(), body)?737 }738 }739 _ => panic!("{:?} is not a function", value),740 }741 }742 Function(params, body) => evaluate_method(context, params.clone(), body.clone()),743 AssertExpr(AssertStmt(value, msg), returned) => {744 let assertion_result = push(value.clone(), "assertion condition".to_owned(), || {745 evaluate(context.clone(), &value)?746 .try_cast_bool("assertion condition should be boolean")747 })?;748 if assertion_result {749 push(750 returned.clone(),751 "assert 'return' branch".to_owned(),752 || evaluate(context, returned),753 )?754 } else if let Some(msg) = msg {755 panic!(756 "assertion failed ({:?}): {}",757 value,758 evaluate(context, msg)?.try_cast_str("assertion message should be string")?759 );760 } else {761 panic!("assertion failed ({:?}): no message", value);762 }763 }764 Error(e) => create_error(crate::Error::RuntimeError(765 evaluate(context, e)?.try_cast_str("error text should be string")?,766 ))?,767 IfElse {768 cond,769 cond_then,770 cond_else,771 } => {772 if evaluate(context.clone(), &cond.0)?773 .try_cast_bool("if condition should be boolean")?774 {775 evaluate(context, cond_then)?776 } else {777 match cond_else {778 Some(v) => evaluate(context, v)?,779 None => Val::Null,780 }781 }782 }783 Import(path) => {784 let mut import_location = loc785 .clone()786 .expect("imports can't be used without loc_data")787 .0788 .clone();789 import_location.pop();790 with_state(|s| s.import_file(&import_location, path))?791 }792 ImportStr(path) => {793 let mut import_location = loc794 .clone()795 .expect("imports can't be used without loc_data")796 .0797 .clone();798 import_location.pop();799 Val::Str(with_state(|s| s.import_file_str(&import_location, path))?)800 }801 Literal(LiteralType::Super) => return create_error(crate::error::Error::StandaloneSuper),802 })803}