1use crate::{evaluate_add_op, LazyBinding, Result, Val};2use indexmap::IndexMap;3use jrsonnet_parser::{ExprLocation, Visibility};4use std::{cell::RefCell, collections::HashMap, fmt::Debug, rc::Rc};56#[derive(Debug)]7pub struct ObjMember {8 pub add: bool,9 pub visibility: Visibility,10 pub invoke: LazyBinding,11 pub location: Option<ExprLocation>,12}131415type CacheKey = (Rc<str>, usize);16#[derive(Debug)]17pub struct ObjValueInternals {18 super_obj: Option<ObjValue>,19 this_entries: Rc<HashMap<Rc<str>, ObjMember>>,20 value_cache: RefCell<HashMap<CacheKey, Option<Val>>>,21}22#[derive(Clone)]23pub struct ObjValue(pub(crate) Rc<ObjValueInternals>);24impl Debug for ObjValue {25 fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {26 if let Some(super_obj) = self.0.super_obj.as_ref() {27 if f.alternate() {28 write!(f, "{:#?}", super_obj)?;29 } else {30 write!(f, "{:?}", super_obj)?;31 }32 write!(f, " + ")?;33 }34 let mut debug = f.debug_struct("ObjValue");35 for (name, member) in self.0.this_entries.iter() {36 debug.field(name, member);37 }38 #[cfg(feature = "unstable")]39 {40 debug.finish_non_exhaustive()41 }42 #[cfg(not(feature = "unstable"))]43 {44 debug.finish()45 }46 }47}4849impl ObjValue {50 pub fn new(super_obj: Option<Self>, this_entries: Rc<HashMap<Rc<str>, ObjMember>>) -> Self {51 Self(Rc::new(ObjValueInternals {52 super_obj,53 this_entries,54 value_cache: RefCell::new(HashMap::new()),55 }))56 }57 pub fn new_empty() -> Self {58 Self::new(None, Rc::new(HashMap::new()))59 }60 pub fn with_super(&self, super_obj: Self) -> Self {61 match &self.0.super_obj {62 None => Self::new(Some(super_obj), self.0.this_entries.clone()),63 Some(v) => Self::new(Some(v.with_super(super_obj)), self.0.this_entries.clone()),64 }65 }66 pub fn enum_fields(&self, handler: &impl Fn(&Rc<str>, &Visibility)) {67 if let Some(s) = &self.0.super_obj {68 s.enum_fields(handler);69 }70 for (name, member) in self.0.this_entries.iter() {71 handler(name, &member.visibility);72 }73 }74 pub fn fields_visibility(&self) -> IndexMap<Rc<str>, bool> {75 let out = Rc::new(RefCell::new(IndexMap::new()));76 self.enum_fields(&|name, visibility| {77 let mut out = out.borrow_mut();78 match visibility {79 Visibility::Normal => {80 if !out.contains_key(name) {81 out.insert(name.to_owned(), true);82 }83 }84 Visibility::Hidden => {85 out.insert(name.to_owned(), false);86 }87 Visibility::Unhide => {88 out.insert(name.to_owned(), true);89 }90 };91 });92 Rc::try_unwrap(out).unwrap().into_inner()93 }94 pub fn visible_fields(&self) -> Vec<Rc<str>> {95 let mut visible_fields: Vec<_> = self96 .fields_visibility()97 .into_iter()98 .filter(|(_k, v)| *v)99 .map(|(k, _)| k)100 .collect();101 visible_fields.sort();102 visible_fields103 }104 pub fn get(&self, key: Rc<str>) -> Result<Option<Val>> {105 Ok(self.get_raw(key, self)?)106 }107 pub(crate) fn get_raw(&self, key: Rc<str>, real_this: &Self) -> Result<Option<Val>> {108 let cache_key = (key.clone(), Rc::as_ptr(&real_this.0) as usize);109110 if let Some(v) = self.0.value_cache.borrow().get(&cache_key) {111 return Ok(v.clone());112 }113 let value = match (self.0.this_entries.get(&key), &self.0.super_obj) {114 (Some(k), None) => Ok(Some(self.evaluate_this(k, real_this)?)),115 (Some(k), Some(s)) => {116 let our = self.evaluate_this(k, real_this)?;117 if k.add {118 s.get_raw(key, real_this)?119 .map_or(Ok(Some(our.clone())), |v| {120 Ok(Some(evaluate_add_op(&v, &our)?))121 })122 } else {123 Ok(Some(our))124 }125 }126 (None, Some(s)) => s.get_raw(key, real_this),127 (None, None) => Ok(None),128 }?;129 self.0130 .value_cache131 .borrow_mut()132 .insert(cache_key, value.clone());133 Ok(value)134 }135 fn evaluate_this(&self, v: &ObjMember, real_this: &Self) -> Result<Val> {136 Ok(v.invoke137 .evaluate(Some(real_this.clone()), self.0.super_obj.clone())?138 .evaluate()?)139 }140}141impl PartialEq for ObjValue {142 fn eq(&self, other: &Self) -> bool {143 Rc::ptr_eq(&self.0, &other.0)144 }145}