git.delta.rocks / jrsonnet / refs/commits / 190d87fc6e1a

1use crate::{2	context_creator, create_error, create_error_result, equals, escape_string_json, future_wrapper,3	lazy_val, manifest_json_ex, parse_args, primitive_equals, push, with_state, Context,4	ContextCreator, Error, FuncDesc, LazyBinding, LazyVal, ObjMember, ObjValue, Result, Val,5	ValType,6};7use closure::closure;8use jrsonnet_parser::{9	ArgsDesc, AssertStmt, BinaryOpType, BindSpec, CompSpec, Expr, ExprLocation, FieldMember,10	ForSpecData, IfSpecData, LiteralType, LocExpr, Member, ObjBody, ParamsDesc, UnaryOpType,11	Visibility,12};13use std::{collections::HashMap, rc::Rc};1415pub fn evaluate_binding(b: &BindSpec, context_creator: ContextCreator) -> (Rc<str>, LazyBinding) {16	let b = b.clone();17	if let Some(params) = &b.params {18		let params = params.clone();19		(20			b.name.clone(),21			LazyBinding::Bindable(Rc::new(move |this, super_obj| {22				Ok(lazy_val!(23					closure!(clone b, clone params, clone context_creator, || Ok(evaluate_method(24						context_creator.0(this.clone(), super_obj.clone())?,25						b.name.clone(),26						params.clone(),27						b.value.clone(),28					)))29				))30			})),31		)32	} else {33		(34			b.name.clone(),35			LazyBinding::Bindable(Rc::new(move |this, super_obj| {36				Ok(lazy_val!(closure!(clone context_creator, clone b, ||37						evaluate_named(38							context_creator.0(this.clone(), super_obj.clone())?,39							&b.value,40							b.name.clone()41						)42				)))43			})),44		)45	}46}4748pub fn evaluate_method(ctx: Context, name: Rc<str>, params: ParamsDesc, body: LocExpr) -> Val {49	Val::Func(Rc::new(FuncDesc {50		name,51		ctx,52		params,53		body,54	}))55}5657pub fn evaluate_field_name(58	context: Context,59	field_name: &jrsonnet_parser::FieldName,60) -> Result<Option<Rc<str>>> {61	Ok(match field_name {62		jrsonnet_parser::FieldName::Fixed(n) => Some(n.clone()),63		jrsonnet_parser::FieldName::Dyn(expr) => {64			let lazy = evaluate(context, expr)?;65			let value = lazy.unwrap_if_lazy()?;66			if matches!(value, Val::Null) {67				None68			} else {69				Some(value.try_cast_str("dynamic field name")?)70			}71		}72	})73}7475pub fn evaluate_unary_op(op: UnaryOpType, b: &Val) -> Result<Val> {76	Ok(match (op, b) {77		(o, Val::Lazy(l)) => evaluate_unary_op(o, &l.evaluate()?)?,78		(UnaryOpType::Not, Val::Bool(v)) => Val::Bool(!v),79		(UnaryOpType::Minus, Val::Num(n)) => Val::Num(-*n),80		(UnaryOpType::BitNot, Val::Num(n)) => Val::Num(!(*n as i32) as f64),81		(op, o) => create_error_result(Error::UnaryOperatorDoesNotOperateOnType(82			op,83			o.value_type()?,84		))?,85	})86}8788pub(crate) fn evaluate_add_op(a: &Val, b: &Val) -> Result<Val> {89	Ok(match (a, b) {90		(Val::Str(v1), Val::Str(v2)) => Val::Str(((**v1).to_owned() + &v2).into()),9192		// Can't use generic json serialization way, because it depends on number to string concatenation (std.jsonnet:890)93		(Val::Num(n), Val::Str(o)) => Val::Str(format!("{}{}", n, o).into()),94		(Val::Str(o), Val::Num(n)) => Val::Str(format!("{}{}", o, n).into()),9596		(Val::Str(s), o) => Val::Str(format!("{}{}", s, o.clone().into_json(0)?).into()),97		(o, Val::Str(s)) => Val::Str(format!("{}{}", o.clone().into_json(0)?, s).into()),9899		(Val::Obj(v1), Val::Obj(v2)) => Val::Obj(v2.with_super(v1.clone())),100		(Val::Arr(a), Val::Arr(b)) => Val::Arr(Rc::new([&a[..], &b[..]].concat())),101		(Val::Num(v1), Val::Num(v2)) => Val::new_checked_num(v1 + v2)?,102		_ => create_error_result(Error::BinaryOperatorDoesNotOperateOnValues(103			BinaryOpType::Add,104			a.value_type()?,105			b.value_type()?,106		))?,107	})108}109110pub fn evaluate_binary_op_special(111	context: Context,112	a: &LocExpr,113	op: BinaryOpType,114	b: &LocExpr,115) -> Result<Val> {116	Ok(117		match (evaluate(context.clone(), &a)?.unwrap_if_lazy()?, op, b) {118			(Val::Bool(true), BinaryOpType::Or, _o) => Val::Bool(true),119			(Val::Bool(false), BinaryOpType::And, _o) => Val::Bool(false),120			(a, op, eb) => {121				evaluate_binary_op_normal(&a, op, &evaluate(context, eb)?.unwrap_if_lazy()?)?122			}123		},124	)125}126127pub fn evaluate_binary_op_normal(a: &Val, op: BinaryOpType, b: &Val) -> Result<Val> {128	Ok(match (a, op, b) {129		(a, BinaryOpType::Add, b) => evaluate_add_op(a, b)?,130131		(Val::Str(v1), BinaryOpType::Mul, Val::Num(v2)) => Val::Str(v1.repeat(*v2 as usize).into()),132133		// Bool X Bool134		(Val::Bool(a), BinaryOpType::And, Val::Bool(b)) => Val::Bool(*a && *b),135		(Val::Bool(a), BinaryOpType::Or, Val::Bool(b)) => Val::Bool(*a || *b),136137		// Str X Str138		(Val::Str(v1), BinaryOpType::Lt, Val::Str(v2)) => Val::Bool(v1 < v2),139		(Val::Str(v1), BinaryOpType::Gt, Val::Str(v2)) => Val::Bool(v1 > v2),140		(Val::Str(v1), BinaryOpType::Lte, Val::Str(v2)) => Val::Bool(v1 <= v2),141		(Val::Str(v1), BinaryOpType::Gte, Val::Str(v2)) => Val::Bool(v1 >= v2),142143		// Num X Num144		(Val::Num(v1), BinaryOpType::Mul, Val::Num(v2)) => Val::new_checked_num(v1 * v2)?,145		(Val::Num(v1), BinaryOpType::Div, Val::Num(v2)) => {146			if *v2 <= f64::EPSILON {147				create_error_result(crate::Error::DivisionByZero)?148			}149			Val::new_checked_num(v1 / v2)?150		}151152		(Val::Num(v1), BinaryOpType::Sub, Val::Num(v2)) => Val::new_checked_num(v1 - v2)?,153154		(Val::Num(v1), BinaryOpType::Lt, Val::Num(v2)) => Val::Bool(v1 < v2),155		(Val::Num(v1), BinaryOpType::Gt, Val::Num(v2)) => Val::Bool(v1 > v2),156		(Val::Num(v1), BinaryOpType::Lte, Val::Num(v2)) => Val::Bool(v1 <= v2),157		(Val::Num(v1), BinaryOpType::Gte, Val::Num(v2)) => Val::Bool(v1 >= v2),158159		(Val::Num(v1), BinaryOpType::BitAnd, Val::Num(v2)) => {160			Val::Num(((*v1 as i32) & (*v2 as i32)) as f64)161		}162		(Val::Num(v1), BinaryOpType::BitOr, Val::Num(v2)) => {163			Val::Num(((*v1 as i32) | (*v2 as i32)) as f64)164		}165		(Val::Num(v1), BinaryOpType::BitXor, Val::Num(v2)) => {166			Val::Num(((*v1 as i32) ^ (*v2 as i32)) as f64)167		}168		(Val::Num(v1), BinaryOpType::Lhs, Val::Num(v2)) => {169			if *v2 < 0.0 {170				create_error_result(Error::RuntimeError("shift by negative exponent".into()))?171			}172			Val::Num(((*v1 as i32) << (*v2 as i32)) as f64)173		}174		(Val::Num(v1), BinaryOpType::Rhs, Val::Num(v2)) => {175			if *v2 < 0.0 {176				create_error_result(Error::RuntimeError("shift by negative exponent".into()))?177			}178			Val::Num(((*v1 as i32) >> (*v2 as i32)) as f64)179		}180181		_ => create_error_result(Error::BinaryOperatorDoesNotOperateOnValues(182			op,183			a.value_type()?,184			b.value_type()?,185		))?,186	})187}188189future_wrapper!(HashMap<Rc<str>, LazyBinding>, FutureNewBindings);190future_wrapper!(ObjValue, FutureObjValue);191192pub fn evaluate_comp<T>(193	context: Context,194	value: &impl Fn(Context) -> Result<T>,195	specs: &[CompSpec],196) -> Result<Option<Vec<T>>> {197	Ok(match specs.get(0) {198		None => Some(vec![value(context)?]),199		Some(CompSpec::IfSpec(IfSpecData(cond))) => {200			if evaluate(context.clone(), &cond)?.try_cast_bool("if spec")? {201				evaluate_comp(context, value, &specs[1..])?202			} else {203				None204			}205		}206		Some(CompSpec::ForSpec(ForSpecData(var, expr))) => {207			match evaluate(context.clone(), &expr)?.unwrap_if_lazy()? {208				Val::Arr(list) => {209					let mut out = Vec::new();210					for item in list.iter() {211						let item = item.unwrap_if_lazy()?;212						out.push(evaluate_comp(213							context.with_var(var.clone(), item.clone())?,214							value,215							&specs[1..],216						)?);217					}218					Some(out.into_iter().flatten().flatten().collect())219				}220				_ => create_error_result(Error::InComprehensionCanOnlyIterateOverArray)?,221			}222		}223	})224}225226pub fn evaluate_member_list_object(context: Context, members: &[Member]) -> Result<ObjValue> {227	let new_bindings = FutureNewBindings::new();228	let future_this = FutureObjValue::new();229	let context_creator = context_creator!(230		closure!(clone context, clone new_bindings, |this: Option<ObjValue>, super_obj: Option<ObjValue>| {231			Ok(context.extend_unbound(232				new_bindings.clone().unwrap(),233				context.dollar().clone().or_else(||this.clone()),234				Some(this.unwrap()),235				super_obj236			)?)237		})238	);239	{240		let mut bindings: HashMap<Rc<str>, LazyBinding> = HashMap::new();241		for (n, b) in members242			.iter()243			.filter_map(|m| match m {244				Member::BindStmt(b) => Some(b.clone()),245				_ => None,246			})247			.map(|b| evaluate_binding(&b, context_creator.clone()))248		{249			bindings.insert(n, b);250		}251		new_bindings.fill(bindings);252	}253254	let mut new_members = HashMap::new();255	for member in members.iter() {256		match member {257			Member::Field(FieldMember {258				name,259				plus,260				params: None,261				visibility,262				value,263			}) => {264				let name = evaluate_field_name(context.clone(), &name)?;265				if name.is_none() {266					continue;267				}268				let name = name.unwrap();269				new_members.insert(270					name.clone(),271					ObjMember {272						add: *plus,273						visibility: *visibility,274						invoke: LazyBinding::Bindable(Rc::new(275							closure!(clone name, clone value, clone context_creator, |this, super_obj| {276								Ok(LazyVal::new_resolved(evaluate(277									context_creator.0(this, super_obj)?,278									&value,279								)?))280							}),281						)),282						location: value.1.clone(),283					},284				);285			}286			Member::Field(FieldMember {287				name,288				params: Some(params),289				value,290				..291			}) => {292				let name = evaluate_field_name(context.clone(), &name)?;293				if name.is_none() {294					continue;295				}296				let name = name.unwrap();297				new_members.insert(298					name.clone(),299					ObjMember {300						add: false,301						visibility: Visibility::Hidden,302						invoke: LazyBinding::Bindable(Rc::new(303							closure!(clone value, clone context_creator, clone params, clone name, |this, super_obj| {304								// TODO: Assert305								Ok(LazyVal::new_resolved(evaluate_method(306									context_creator.0(this, super_obj)?,307									name.clone(),308									params.clone(),309									value.clone(),310								)))311							}),312						)),313						location: value.1.clone(),314					},315				);316			}317			Member::BindStmt(_) => {}318			Member::AssertStmt(_) => {}319		}320	}321	Ok(future_this.fill(ObjValue::new(None, Rc::new(new_members))))322}323324pub fn evaluate_object(context: Context, object: &ObjBody) -> Result<ObjValue> {325	Ok(match object {326		ObjBody::MemberList(members) => evaluate_member_list_object(context, &members)?,327		ObjBody::ObjComp(obj) => {328			let future_this = FutureObjValue::new();329			let mut new_members = HashMap::new();330			for (k, v) in evaluate_comp(331				context.clone(),332				&|ctx| {333					let new_bindings = FutureNewBindings::new();334					let context_creator = context_creator!(335						closure!(clone context, clone new_bindings, |this: Option<ObjValue>, super_obj: Option<ObjValue>| {336							Ok(context.extend_unbound(337								new_bindings.clone().unwrap(),338								context.dollar().clone().or_else(||this.clone()),339								None,340								super_obj341							)?)342						})343					);344					let mut bindings: HashMap<Rc<str>, LazyBinding> = HashMap::new();345					for (n, b) in obj346						.pre_locals347						.iter()348						.chain(obj.post_locals.iter())349						.map(|b| evaluate_binding(b, context_creator.clone()))350					{351						bindings.insert(n, b);352					}353					let bindings = new_bindings.fill(bindings);354					let ctx = ctx.extend_unbound(bindings, None, None, None)?;355					let key = evaluate(ctx.clone(), &obj.key)?;356					let value = LazyBinding::Bindable(Rc::new(357						closure!(clone ctx, clone obj.value, |this, _super_obj| {358							Ok(LazyVal::new_resolved(evaluate(ctx.extend(HashMap::new(), None, this, None)?, &value)?))359						}),360					));361362					Ok((key, value))363				},364				&obj.compspecs,365			)?366			.unwrap()367			{368				match k {369					Val::Null => {}370					Val::Str(n) => {371						new_members.insert(372							n,373							ObjMember {374								add: false,375								visibility: Visibility::Normal,376								invoke: v,377								location: obj.value.1.clone(),378							},379						);380					}381					v => create_error_result(Error::FieldMustBeStringGot(v.value_type()?))?,382				}383			}384385			future_this.fill(ObjValue::new(None, Rc::new(new_members)))386		}387	})388}389390/// Extracts code block and disables inlining for them391/// Fixes WASM to java bytecode compilation failing because of very large method392macro_rules! noinline {393	($e:expr) => {394		(#[inline(never)]395		move || $e)()396	};397}398399pub fn evaluate_apply(400	context: Context,401	value: &LocExpr,402	args: &ArgsDesc,403	loc: &Option<ExprLocation>,404	tailstrict: bool,405) -> Result<Val> {406	let lazy = evaluate(context.clone(), value)?;407	let value = lazy.unwrap_if_lazy()?;408	Ok(match value {409		Val::Intristic(ns, name) => match (&ns as &str, &name as &str) {410			// arr/string/function411			("std", "length") => noinline!(parse_args!(context, "std.length", args, 1, [412				0, x: [Val::Str|Val::Arr|Val::Obj], vec![ValType::Str, ValType::Arr, ValType::Obj];413			], {414				Ok(match x {415					Val::Str(n) => Val::Num(n.chars().count() as f64),416					Val::Arr(i) => Val::Num(i.len() as f64),417					Val::Obj(o) => Val::Num(418						o.fields_visibility()419							.into_iter()420							.filter(|(_k, v)| *v)421							.count() as f64,422					),423					_ => unreachable!(),424				})425			}))?,426			// any427			("std", "type") => parse_args!(context, "std.type", args, 1, [428				0, x, vec![];429			], {430				Val::Str(x.value_type()?.name().into())431			}),432			// length, idx=>any433			("std", "makeArray") => noinline!(parse_args!(context, "std.makeArray", args, 2, [434				0, sz: [Val::Num]!!Val::Num, vec![ValType::Num];435				1, func: [Val::Func]!!Val::Func, vec![ValType::Func];436			], {437				if sz < 0.0 {438					create_error_result(crate::error::Error::RuntimeError(format!("makeArray requires size >= 0, got {}", sz).into()))?;439				}440				let mut out = Vec::with_capacity(sz as usize);441				for i in 0..sz as usize {442					out.push(func.evaluate_values(443						Context::new(),444						&[Val::Num(i as f64)]445					)?)446				}447				Ok(Val::Arr(Rc::new(out)))448			}))?,449			// string450			("std", "codepoint") => parse_args!(context, "std.codepoint", args, 1, [451				0, str: [Val::Str]!!Val::Str, vec![ValType::Str];452			], {453				assert!(454					str.chars().count() == 1,455					"std.codepoint should receive single char string"456				);457				Val::Num(str.chars().take(1).next().unwrap() as u32 as f64)458			}),459			// object, includeHidden460			("std", "objectFieldsEx") => {461				noinline!(parse_args!(context, "std.objectFieldsEx",args, 2, [462					0, obj: [Val::Obj]!!Val::Obj, vec![ValType::Obj];463					1, inc_hidden: [Val::Bool]!!Val::Bool, vec![ValType::Bool];464				], {465					let mut out = obj.fields_visibility()466						.into_iter()467						.filter(|(_k, v)| *v || inc_hidden)468						.map(|(k, _v)|k)469						.collect::<Vec<_>>();470					out.sort();471					Ok(Val::Arr(Rc::new(out.into_iter().map(Val::Str).collect())))472				}))?473			}474			// object, field, includeHidden475			("std", "objectHasEx") => parse_args!(context, "std.objectHasEx", args, 3, [476				0, obj: [Val::Obj]!!Val::Obj, vec![ValType::Obj];477				1, f: [Val::Str]!!Val::Str, vec![ValType::Str];478				2, inc_hidden: [Val::Bool]!!Val::Bool, vec![ValType::Bool];479			], {480				Val::Bool(481					obj.fields_visibility()482						.into_iter()483						.filter(|(_k, v)| *v || inc_hidden)484						.any(|(k, _v)| *k == *f),485				)486			}),487			("std", "primitiveEquals") => parse_args!(context, "std.primitiveEquals", args, 2, [488				0, a, vec![];489				1, b, vec![];490			], {491				Val::Bool(primitive_equals(&a, &b)?)492			}),493			// faster494			("std", "equals") => parse_args!(context, "std.equals", args, 2, [495				0, a, vec![];496				1, b, vec![];497			], {498				Val::Bool(equals(&a, &b)?)499			}),500			("std", "modulo") => parse_args!(context, "std.modulo", args, 2, [501				0, a: [Val::Num]!!Val::Num, vec![ValType::Num];502				1, b: [Val::Num]!!Val::Num, vec![ValType::Num];503			], {504				Val::Num(a % b)505			}),506			("std", "floor") => parse_args!(context, "std.floor", args, 1, [507				0, x: [Val::Num]!!Val::Num, vec![ValType::Num];508			], {509				Val::Num(x.floor())510			}),511			("std", "trace") => parse_args!(context, "std.trace", args, 2, [512				0, str: [Val::Str]!!Val::Str, vec![ValType::Str];513				1, rest, vec![];514			], {515				eprint!("TRACE:");516				if let Some(loc) = loc {517					with_state(|s|{518						let locs = s.map_source_locations(&loc.0, &[loc.1]);519						eprint!(" {}:{}", loc.0.file_name().unwrap().to_str().unwrap(), locs[0].line);520					});521				}522				eprintln!(" {}", str);523				rest524			}),525			("std", "pow") => parse_args!(context, "std.modulo", args, 2, [526				0, x: [Val::Num]!!Val::Num, vec![ValType::Num];527				1, n: [Val::Num]!!Val::Num, vec![ValType::Num];528			], {529				Val::Num(x.powf(n))530			}),531			("std", "extVar") => parse_args!(context, "std.extVar", args, 2, [532				0, x: [Val::Str]!!Val::Str, vec![ValType::Str];533			], {534				with_state(|s| s.settings().ext_vars.get(&x).cloned()).ok_or_else(535					|| create_error(crate::Error::UndefinedExternalVariable(x)),536				)?537			}),538			("std", "filter") => noinline!(parse_args!(context, "std.filter", args, 2, [539				0, func: [Val::Func]!!Val::Func, vec![ValType::Func];540				1, arr: [Val::Arr]!!Val::Arr, vec![ValType::Arr];541			], {542				Ok(Val::Arr(Rc::new(543					arr.iter()544						.cloned()545						.filter(|e| {546							func547								.evaluate_values(context.clone(), &[e.clone()])548								.unwrap()549								.try_cast_bool("filter predicate")550								.unwrap()551						})552						.collect(),553				)))554			}))?,555			("std", "char") => parse_args!(context, "std.char", args, 1, [556				0, n: [Val::Num]!!Val::Num, vec![ValType::Num];557			], {558				let mut out = String::new();559				out.push(std::char::from_u32(n as u32).unwrap());560				Val::Str(out.into())561			}),562			("std", "encodeUTF8") => parse_args!(context, "std.encodeUtf8", args, 1, [563				0, str: [Val::Str]!!Val::Str, vec![ValType::Str];564			], {565				Val::Arr(Rc::new(str.bytes().map(|b| Val::Num(b as f64)).collect()))566			}),567			("std", "md5") => noinline!(parse_args!(context, "std.md5", args, 1, [568				0, str: [Val::Str]!!Val::Str, vec![ValType::Str];569			], {570				Ok(Val::Str(format!("{:x}", md5::compute(&str.as_bytes())).into()))571			}))?,572			// faster573			("std", "base64") => parse_args!(context, "std.base64", args, 1, [574				0, input: [Val::Str | Val::Arr], vec![ValType::Arr, ValType::Str];575			], {576				Val::Str(match input {577					Val::Str(s) => {578						base64::encode(s.bytes().collect::<Vec<_>>()).into()579					},580					Val::Arr(a) => {581						base64::encode(a.iter().map(|v| {582							Ok(v.clone().try_cast_num("base64 array")? as u8)583						}).collect::<Result<Vec<_>>>()?).into()584					},585					_ => unreachable!()586				})587			}),588			// faster589			("std", "join") => noinline!(parse_args!(context, "std.join", args, 2, [590				0, sep: [Val::Str|Val::Arr], vec![ValType::Str, ValType::Arr];591				1, arr: [Val::Arr]!!Val::Arr, vec![ValType::Arr];592			], {593				Ok(match sep {594					Val::Arr(joiner_items) => {595						let mut out = Vec::new();596597						let mut first = true;598						for item in arr.iter().cloned() {599							if let Val::Arr(items) = item.unwrap_if_lazy()? {600								if !first {601									out.reserve(joiner_items.len());602									out.extend(joiner_items.iter().cloned());603								}604								first = false;605								out.reserve(items.len());606								out.extend(items.iter().cloned());607							} else {608								create_error_result(crate::Error::RuntimeError("in std.join all items should be arrays".into()))?;609							}610						}611612						Val::Arr(Rc::new(out))613					},614					Val::Str(sep) => {615						let mut out = String::new();616617						let mut first = true;618						for item in arr.iter().cloned() {619							if let Val::Str(item) = item.unwrap_if_lazy()? {620								if !first {621									out += &sep;622								}623								first = false;624								out += &item;625							} else {626								create_error_result(crate::Error::RuntimeError("in std.join all items should be strings".into()))?;627							}628						}629630						Val::Str(out.into())631					},632					_ => unreachable!()633				})634			}))?,635			// Faster636			("std", "escapeStringJson") => parse_args!(context, "std.escapeStringJson", args, 1, [637				0, str_: [Val::Str]!!Val::Str, vec![ValType::Str];638			], {639				Val::Str(escape_string_json(&str_).into())640			}),641			// Faster642			("std", "manifestJsonEx") => parse_args!(context, "std.manifestJsonEx", args, 2, [643				0, value, vec![];644				1, indent: [Val::Str]!!Val::Str, vec![ValType::Str];645			], {646				Val::Str(manifest_json_ex(&value, &indent)?.into())647			}),648			(ns, name) => {649				create_error_result(crate::Error::IntristicNotFound(ns.into(), name.into()))?650			}651		},652		Val::Func(f) => {653			let body = || f.evaluate(context, args, tailstrict);654			if tailstrict {655				body()?656			} else {657				push(loc, || format!("function <{}> call", f.name), body)?658			}659		}660		v => create_error_result(crate::Error::OnlyFunctionsCanBeCalledGot(v.value_type()?))?,661	})662}663664pub fn evaluate_named(context: Context, lexpr: &LocExpr, name: Rc<str>) -> Result<Val> {665	use Expr::*;666	let LocExpr(expr, _loc) = lexpr;667	Ok(match &**expr {668		Function(params, body) => evaluate_method(context, name, params.clone(), body.clone()),669		_ => evaluate(context, lexpr)?,670	})671}672673pub fn evaluate(context: Context, expr: &LocExpr) -> Result<Val> {674	use Expr::*;675	let LocExpr(expr, loc) = expr;676	Ok(match &**expr {677		Literal(LiteralType::This) => Val::Obj(678			context679				.this()680				.clone()681				.ok_or_else(|| create_error(crate::Error::CantUseSelfOutsideOfObject))?,682		),683		Literal(LiteralType::Dollar) => Val::Obj(684			context685				.dollar()686				.clone()687				.ok_or_else(|| create_error(crate::Error::NoTopLevelObjectFound))?,688		),689		Literal(LiteralType::True) => Val::Bool(true),690		Literal(LiteralType::False) => Val::Bool(false),691		Literal(LiteralType::Null) => Val::Null,692		Parened(e) => evaluate(context, e)?,693		Str(v) => Val::Str(v.clone()),694		Num(v) => Val::new_checked_num(*v)?,695		BinaryOp(v1, o, v2) => evaluate_binary_op_special(context, &v1, *o, &v2)?,696		UnaryOp(o, v) => evaluate_unary_op(*o, &evaluate(context, v)?)?,697		Var(name) => push(698			loc,699			|| format!("variable <{}>", name),700			|| Ok(Val::Lazy(context.binding(name.clone())?).unwrap_if_lazy()?),701		)?,702		Index(LocExpr(v, _), index) if matches!(&**v, Expr::Literal(LiteralType::Super)) => {703			let name = evaluate(context.clone(), index)?.try_cast_str("object index")?;704			context705				.super_obj()706				.clone()707				.expect("no super found")708				.get_raw(&name, &context.this().clone().expect("no this found"))?709				.expect("value not found")710		}711		Index(value, index) => {712			match (713				evaluate(context.clone(), value)?.unwrap_if_lazy()?,714				evaluate(context, index)?,715			) {716				(Val::Obj(v), Val::Str(s)) => {717					if let Some(v) = v.get(s.clone())? {718						v.unwrap_if_lazy()?719					} else if let Some(Val::Str(n)) = v.get("__intristic_namespace__".into())? {720						Val::Intristic(n, s)721					} else {722						create_error_result(crate::Error::NoSuchField(s))?723					}724				}725				(Val::Obj(_), n) => create_error_result(crate::Error::ValueIndexMustBeTypeGot(726					ValType::Obj,727					ValType::Str,728					n.value_type()?,729				))?,730731				(Val::Arr(v), Val::Num(n)) => {732					if n.fract() > f64::EPSILON {733						create_error_result(crate::Error::FractionalIndex)?734					}735					v.get(n as usize)736						.ok_or_else(|| {737							create_error(crate::Error::ArrayBoundsError(n as usize, v.len()))738						})?739						.clone()740						.unwrap_if_lazy()?741				}742				(Val::Arr(_), Val::Str(n)) => {743					create_error_result(crate::Error::AttemptedIndexAnArrayWithString(n))?744				}745				(Val::Arr(_), n) => create_error_result(crate::Error::ValueIndexMustBeTypeGot(746					ValType::Arr,747					ValType::Num,748					n.value_type()?,749				))?,750751				(Val::Str(s), Val::Num(n)) => Val::Str(752					s.chars()753						.skip(n as usize)754						.take(1)755						.collect::<String>()756						.into(),757				),758				(Val::Str(_), n) => create_error_result(crate::Error::ValueIndexMustBeTypeGot(759					ValType::Str,760					ValType::Num,761					n.value_type()?,762				))?,763764				(v, _) => create_error_result(crate::Error::CantIndexInto(v.value_type()?))?,765			}766		}767		LocalExpr(bindings, returned) => {768			let mut new_bindings: HashMap<Rc<str>, LazyBinding> = HashMap::new();769			let future_context = Context::new_future();770771			let context_creator = context_creator!(772				closure!(clone future_context, |_, _| Ok(future_context.clone().unwrap()))773			);774775			for (k, v) in bindings776				.iter()777				.map(|b| evaluate_binding(b, context_creator.clone()))778			{779				new_bindings.insert(k, v);780			}781782			let context = context783				.extend_unbound(new_bindings, None, None, None)?784				.into_future(future_context);785			evaluate(context, &returned.clone())?786		}787		Arr(items) => {788			let mut out = Vec::with_capacity(items.len());789			for item in items {790				out.push(Val::Lazy(lazy_val!(791					closure!(clone context, clone item, || {792						evaluate(context.clone(), &item)793					})794				)));795			}796			Val::Arr(Rc::new(out))797		}798		ArrComp(expr, compspecs) => Val::Arr(799			// First compspec should be forspec, so no "None" possible here800			Rc::new(evaluate_comp(context, &|ctx| evaluate(ctx, expr), compspecs)?.unwrap()),801		),802		Obj(body) => Val::Obj(evaluate_object(context, body)?),803		ObjExtend(s, t) => evaluate_add_op(804			&evaluate(context.clone(), s)?,805			&Val::Obj(evaluate_object(context, t)?),806		)?,807		Apply(value, args, tailstrict) => evaluate_apply(context, value, args, loc, *tailstrict)?,808		Function(params, body) => {809			evaluate_method(context, "anonymous".into(), params.clone(), body.clone())810		}811		AssertExpr(AssertStmt(value, msg), returned) => {812			let assertion_result = push(813				&value.1,814				|| "assertion condition".to_owned(),815				|| {816					evaluate(context.clone(), &value)?817						.try_cast_bool("assertion condition should be boolean")818				},819			)?;820			if assertion_result {821				evaluate(context, returned)?822			} else if let Some(msg) = msg {823				create_error_result(crate::Error::AssertionFailed(evaluate(context, msg)?))?824			} else {825				create_error_result(crate::Error::AssertionFailed(Val::Null))?826			}827		}828		Error(e) => push(829			&loc,830			|| "error statement".to_owned(),831			|| {832				create_error_result(crate::Error::RuntimeError(833					evaluate(context, e)?.try_cast_str("error text should be string")?,834				))?835			},836		)?,837		IfElse {838			cond,839			cond_then,840			cond_else,841		} => {842			if evaluate(context.clone(), &cond.0)?843				.try_cast_bool("if condition should be boolean")?844			{845				evaluate(context, cond_then)?846			} else {847				match cond_else {848					Some(v) => evaluate(context, v)?,849					None => Val::Null,850				}851			}852		}853		Import(path) => {854			let mut tmp = loc855				.clone()856				.expect("imports can't be used without loc_data")857				.0;858			let import_location = Rc::make_mut(&mut tmp);859			import_location.pop();860			push(861				loc,862				|| format!("import {:?}", path),863				|| with_state(|s| s.import_file(&import_location, path)),864			)?865		}866		ImportStr(path) => {867			let mut tmp = loc868				.clone()869				.expect("imports can't be used without loc_data")870				.0;871			let import_location = Rc::make_mut(&mut tmp);872			import_location.pop();873			Val::Str(with_state(|s| s.import_file_str(&import_location, path))?)874		}875		Literal(LiteralType::Super) => return create_error_result(crate::Error::StandaloneSuper),876	})877}