1use crate::operator::evaluate_add_op;2use crate::{Bindable, LazyBinding, LazyVal, Result, Val};3use jrsonnet_gc::{Gc, GcCell, Trace};4use jrsonnet_interner::IStr;5use jrsonnet_parser::{ExprLocation, Visibility};6use rustc_hash::{FxHashMap, FxHashSet, FxHasher};7use std::collections::HashMap;8use std::hash::{Hash, Hasher};9use std::{fmt::Debug, hash::BuildHasherDefault};1011#[derive(Debug, Trace)]12#[trivially_drop]13pub struct ObjMember {14 pub add: bool,15 pub visibility: Visibility,16 pub invoke: LazyBinding,17 pub location: Option<ExprLocation>,18}1920pub trait ObjectAssertion: Trace {21 fn run(&self, this: Option<ObjValue>, super_obj: Option<ObjValue>) -> Result<()>;22}232425type CacheKey = (IStr, ObjValue);26#[derive(Trace)]27#[trivially_drop]28pub struct ObjValueInternals {29 super_obj: Option<ObjValue>,30 assertions: Gc<Vec<Box<dyn ObjectAssertion>>>,31 assertions_ran: GcCell<FxHashSet<ObjValue>>,32 this_obj: Option<ObjValue>,33 this_entries: Gc<FxHashMap<IStr, ObjMember>>,34 value_cache: GcCell<FxHashMap<CacheKey, Option<Val>>>,35}3637#[derive(Clone, Trace)]38#[trivially_drop]39pub struct ObjValue(pub(crate) Gc<ObjValueInternals>);40impl Debug for ObjValue {41 fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {42 if let Some(super_obj) = self.0.super_obj.as_ref() {43 if f.alternate() {44 write!(f, "{:#?}", super_obj)?;45 } else {46 write!(f, "{:?}", super_obj)?;47 }48 write!(f, " + ")?;49 }50 let mut debug = f.debug_struct("ObjValue");51 for (name, member) in self.0.this_entries.iter() {52 debug.field(name, member);53 }54 #[cfg(feature = "unstable")]55 {56 debug.finish_non_exhaustive()57 }58 #[cfg(not(feature = "unstable"))]59 {60 debug.finish()61 }62 }63}6465impl ObjValue {66 pub fn new(67 super_obj: Option<Self>,68 this_entries: Gc<FxHashMap<IStr, ObjMember>>,69 assertions: Gc<Vec<Box<dyn ObjectAssertion>>>,70 ) -> Self {71 Self(Gc::new(ObjValueInternals {72 super_obj,73 assertions,74 assertions_ran: GcCell::new(FxHashSet::default()),75 this_obj: None,76 this_entries,77 value_cache: GcCell::new(FxHashMap::default()),78 }))79 }80 pub fn new_empty() -> Self {81 Self::new(None, Gc::new(FxHashMap::default()), Gc::new(Vec::new()))82 }83 pub fn extend_from(&self, super_obj: Self) -> Self {84 match &self.0.super_obj {85 None => Self::new(86 Some(super_obj),87 self.0.this_entries.clone(),88 self.0.assertions.clone(),89 ),90 Some(v) => Self::new(91 Some(v.extend_from(super_obj)),92 self.0.this_entries.clone(),93 self.0.assertions.clone(),94 ),95 }96 }97 pub fn with_this(&self, this_obj: Self) -> Self {98 Self(Gc::new(ObjValueInternals {99 super_obj: self.0.super_obj.clone(),100 assertions: self.0.assertions.clone(),101 assertions_ran: GcCell::new(FxHashSet::default()),102 this_obj: Some(this_obj),103 this_entries: self.0.this_entries.clone(),104 value_cache: GcCell::new(FxHashMap::default()),105 }))106 }107108 109 pub(crate) fn enum_fields(&self, handler: &mut impl FnMut(&IStr, &Visibility) -> bool) -> bool {110 if let Some(s) = &self.0.super_obj {111 if s.enum_fields(handler) {112 return true;113 }114 }115 for (name, member) in self.0.this_entries.iter() {116 if handler(name, &member.visibility) {117 return true;118 }119 }120 false121 }122123 pub fn fields_visibility(&self) -> FxHashMap<IStr, bool> {124 let mut out = FxHashMap::default();125 self.enum_fields(&mut |name, visibility| {126 match visibility {127 Visibility::Normal => {128 let entry = out.entry(name.to_owned());129 entry.or_insert(true);130 }131 Visibility::Hidden => {132 out.insert(name.to_owned(), false);133 }134 Visibility::Unhide => {135 out.insert(name.to_owned(), true);136 }137 };138 false139 });140 out141 }142 pub fn fields_ex(&self, include_hidden: bool) -> Vec<IStr> {143 let mut fields: Vec<_> = self144 .fields_visibility()145 .into_iter()146 .filter(|(_k, v)| include_hidden || *v)147 .map(|(k, _)| k)148 .collect();149 fields.sort_unstable();150 fields151 }152 pub fn fields(&self) -> Vec<IStr> {153 self.fields_ex(false)154 }155156 pub fn field_visibility(&self, name: IStr) -> Option<Visibility> {157 if let Some(m) = self.0.this_entries.get(&name) {158 Some(match &m.visibility {159 Visibility::Normal => self160 .0161 .super_obj162 .as_ref()163 .and_then(|super_obj| super_obj.field_visibility(name))164 .unwrap_or(Visibility::Normal),165 v => *v,166 })167 } else if let Some(super_obj) = &self.0.super_obj {168 super_obj.field_visibility(name)169 } else {170 None171 }172 }173174 fn has_field_include_hidden(&self, name: IStr) -> bool {175 if self.0.this_entries.contains_key(&name) {176 true177 } else if let Some(super_obj) = &self.0.super_obj {178 super_obj.has_field_include_hidden(name)179 } else {180 false181 }182 }183184 pub fn has_field_ex(&self, name: IStr, include_hidden: bool) -> bool {185 if include_hidden {186 self.has_field_include_hidden(name)187 } else {188 self.has_field(name)189 }190 }191 pub fn has_field(&self, name: IStr) -> bool {192 self.field_visibility(name)193 .map(|v| v.is_visible())194 .unwrap_or(false)195 }196197 pub fn get(&self, key: IStr) -> Result<Option<Val>> {198 self.run_assertions()?;199 self.get_raw(key, self.0.this_obj.as_ref())200 }201202 pub fn extend_with_field(self, key: IStr, value: ObjMember) -> Self {203 let mut new = FxHashMap::with_capacity_and_hasher(1, BuildHasherDefault::default());204 new.insert(key, value);205 Self::new(Some(self), Gc::new(new), Gc::new(Vec::new()))206 }207208 fn get_raw(&self, key: IStr, real_this: Option<&Self>) -> Result<Option<Val>> {209 let real_this = real_this.unwrap_or(self);210 let cache_key = (key.clone(), real_this.clone());211212 if let Some(v) = self.0.value_cache.borrow().get(&cache_key) {213 return Ok(v.clone());214 }215 let value = match (self.0.this_entries.get(&key), &self.0.super_obj) {216 (Some(k), None) => Ok(Some(self.evaluate_this(k, real_this)?)),217 (Some(k), Some(s)) => {218 let our = self.evaluate_this(k, real_this)?;219 if k.add {220 s.get_raw(key, Some(real_this))?221 .map_or(Ok(Some(our.clone())), |v| {222 Ok(Some(evaluate_add_op(&v, &our)?))223 })224 } else {225 Ok(Some(our))226 }227 }228 (None, Some(s)) => s.get_raw(key, Some(real_this)),229 (None, None) => Ok(None),230 }?;231 self.0232 .value_cache233 .borrow_mut()234 .insert(cache_key, value.clone());235 Ok(value)236 }237 fn evaluate_this(&self, v: &ObjMember, real_this: &Self) -> Result<Val> {238 v.invoke239 .evaluate(Some(real_this.clone()), self.0.super_obj.clone())?240 .evaluate()241 }242243 fn run_assertions_raw(&self, real_this: &Self) -> Result<()> {244 if self.0.assertions_ran.borrow_mut().insert(real_this.clone()) {245 for assertion in self.0.assertions.iter() {246 if let Err(e) = assertion.run(Some(real_this.clone()), self.0.super_obj.clone()) {247 self.0.assertions_ran.borrow_mut().remove(real_this);248 return Err(e);249 }250 }251 if let Some(super_obj) = &self.0.super_obj {252 super_obj.run_assertions_raw(real_this)?;253 }254 }255 Ok(())256 }257 pub fn run_assertions(&self) -> Result<()> {258 self.run_assertions_raw(self)259 }260261 pub fn ptr_eq(a: &Self, b: &Self) -> bool {262 Gc::ptr_eq(&a.0, &b.0)263 }264}265266impl PartialEq for ObjValue {267 fn eq(&self, other: &Self) -> bool {268 Gc::ptr_eq(&self.0, &other.0)269 }270}271272impl Eq for ObjValue {}273impl Hash for ObjValue {274 fn hash<H: Hasher>(&self, hasher: &mut H) {275 hasher.write_usize(&*self.0 as *const _ as usize)276 }277}278279pub struct ObjValueBuilder {280 super_obj: Option<ObjValue>,281 map: FxHashMap<IStr, ObjMember>,282 assertions: Vec<Box<dyn ObjectAssertion>>,283}284impl ObjValueBuilder {285 pub fn new() -> Self {286 Self::with_capacity(0)287 }288 pub fn with_capacity(capacity: usize) -> Self {289 Self {290 super_obj: None,291 map: HashMap::with_capacity_and_hasher(292 capacity,293 BuildHasherDefault::<FxHasher>::default(),294 ),295 assertions: Vec::new(),296 }297 }298 pub fn reserve_asserts(&mut self, capacity: usize) -> &mut Self {299 self.assertions.reserve_exact(capacity);300 self301 }302 pub fn with_super(&mut self, super_obj: ObjValue) -> &mut Self {303 self.super_obj = Some(super_obj);304 self305 }306307 pub fn assert(&mut self, assertion: Box<dyn ObjectAssertion>) -> &mut Self {308 self.assertions.push(assertion);309 self310 }311 pub fn member(&mut self, name: IStr) -> ObjMemberBuilder {312 ObjMemberBuilder {313 value: self,314 name,315 add: false,316 visibility: Visibility::Normal,317 location: None,318 }319 }320321 pub fn build(self) -> ObjValue {322 ObjValue::new(self.super_obj, Gc::new(self.map), Gc::new(self.assertions))323 }324}325impl Default for ObjValueBuilder {326 fn default() -> Self {327 Self::with_capacity(0)328 }329}330331#[must_use = "value not added unless binding() was called"]332pub struct ObjMemberBuilder<'v> {333 value: &'v mut ObjValueBuilder,334 name: IStr,335 add: bool,336 visibility: Visibility,337 location: Option<ExprLocation>,338}339340#[allow(clippy::missing_const_for_fn)]341impl<'v> ObjMemberBuilder<'v> {342 pub const fn with_add(mut self, add: bool) -> Self {343 self.add = add;344 self345 }346 pub fn add(self) -> Self {347 self.with_add(true)348 }349 pub fn with_visibility(mut self, visibility: Visibility) -> Self {350 self.visibility = visibility;351 self352 }353 pub fn hide(self) -> Self {354 self.with_visibility(Visibility::Hidden)355 }356 pub fn with_location(mut self, location: Option<ExprLocation>) -> Self {357 self.location = location;358 self359 }360 pub fn value(self, value: Val) -> &'v mut ObjValueBuilder {361 self.binding(LazyBinding::Bound(LazyVal::new_resolved(value)))362 }363 pub fn bindable(self, bindable: Box<dyn Bindable>) -> &'v mut ObjValueBuilder {364 self.binding(LazyBinding::Bindable(Gc::new(bindable)))365 }366 pub fn binding(self, binding: LazyBinding) -> &'v mut ObjValueBuilder {367 self.value.map.insert(368 self.name,369 ObjMember {370 add: self.add,371 visibility: self.visibility,372 invoke: binding,373 location: self.location,374 },375 );376 self.value377 }378}