1use std::fmt::Debug;23use gcmodule::{Cc, Trace};4use jrsonnet_interner::IStr;56use crate::{7 cc_ptr_eq, error::Error::*, gc::GcHashMap, map::LayeredHashMap, FutureWrapper, LazyBinding,8 LazyVal, ObjValue, Result, Val,9};1011#[derive(Clone, Trace)]12pub struct ContextCreator(pub Context, pub FutureWrapper<GcHashMap<IStr, LazyBinding>>);13impl ContextCreator {14 pub fn create(&self, this: Option<ObjValue>, super_obj: Option<ObjValue>) -> Result<Context> {15 self.0.clone().extend_unbound(16 self.1.clone().unwrap(),17 self.0.dollar().clone().or_else(|| this.clone()),18 this,19 super_obj,20 )21 }22}2324#[derive(Trace)]25struct ContextInternals {26 dollar: Option<ObjValue>,27 this: Option<ObjValue>,28 super_obj: Option<ObjValue>,29 bindings: LayeredHashMap,30}31impl Debug for ContextInternals {32 fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {33 f.debug_struct("Context").finish()34 }35}3637#[derive(Debug, Clone, Trace)]38pub struct Context(Cc<ContextInternals>);39impl Context {40 pub fn new_future() -> FutureWrapper<Self> {41 FutureWrapper::new()42 }4344 pub fn dollar(&self) -> &Option<ObjValue> {45 &self.0.dollar46 }4748 pub fn this(&self) -> &Option<ObjValue> {49 &self.0.this50 }5152 pub fn super_obj(&self) -> &Option<ObjValue> {53 &self.0.super_obj54 }5556 pub fn new() -> Self {57 Self(Cc::new(ContextInternals {58 dollar: None,59 this: None,60 super_obj: None,61 bindings: LayeredHashMap::default(),62 }))63 }6465 pub fn binding(&self, name: IStr) -> Result<LazyVal> {66 Ok(self67 .068 .bindings69 .get(&name)70 .cloned()71 .ok_or(VariableIsNotDefined(name))?)72 }73 pub fn contains_binding(&self, name: IStr) -> bool {74 self.0.bindings.contains_key(&name)75 }76 pub fn into_future(self, ctx: FutureWrapper<Self>) -> Self {77 {78 ctx.0.borrow_mut().replace(self);79 }80 ctx.unwrap()81 }8283 pub fn with_var(self, name: IStr, value: Val) -> Self {84 let mut new_bindings = GcHashMap::with_capacity(1);85 new_bindings.insert(name, LazyVal::new_resolved(value));86 self.extend(new_bindings, None, None, None)87 }8889 pub fn with_this_super(self, new_this: ObjValue, new_super_obj: Option<ObjValue>) -> Self {90 self.extend(GcHashMap::new(), None, Some(new_this), new_super_obj)91 }9293 pub fn extend(94 self,95 new_bindings: GcHashMap<IStr, LazyVal>,96 new_dollar: Option<ObjValue>,97 new_this: Option<ObjValue>,98 new_super_obj: Option<ObjValue>,99 ) -> Self {100 let ctx = &self.0;101 let dollar = new_dollar.or_else(|| ctx.dollar.clone());102 let this = new_this.or_else(|| ctx.this.clone());103 let super_obj = new_super_obj.or_else(|| ctx.super_obj.clone());104 let bindings = if new_bindings.is_empty() {105 ctx.bindings.clone()106 } else {107 ctx.bindings.clone().extend(new_bindings)108 };109 Self(Cc::new(ContextInternals {110 dollar,111 this,112 super_obj,113 bindings,114 }))115 }116 pub fn extend_bound(self, new_bindings: GcHashMap<IStr, LazyVal>) -> Self {117 let new_this = self.0.this.clone();118 let new_super_obj = self.0.super_obj.clone();119 self.extend(new_bindings, None, new_this, new_super_obj)120 }121 pub fn extend_unbound(122 self,123 new_bindings: GcHashMap<IStr, LazyBinding>,124 new_dollar: Option<ObjValue>,125 new_this: Option<ObjValue>,126 new_super_obj: Option<ObjValue>,127 ) -> Result<Self> {128 let this = new_this.or_else(|| self.0.this.clone());129 let super_obj = new_super_obj.or_else(|| self.0.super_obj.clone());130 let mut new = GcHashMap::with_capacity(new_bindings.len());131 for (k, v) in new_bindings.0.into_iter() {132 new.insert(k, v.evaluate(this.clone(), super_obj.clone())?);133 }134 Ok(self.extend(new, new_dollar, this, super_obj))135 }136}137138impl Default for Context {139 fn default() -> Self {140 Self::new()141 }142}143144impl PartialEq for Context {145 fn eq(&self, other: &Self) -> bool {146 cc_ptr_eq(&self.0, &other.0)147 }148}