git.delta.rocks / jrsonnet / refs/commits / b8416d678e88

1use crate::{2	binding, context_creator, create_error, function_default, function_rhs, future_wrapper,3	lazy_binding, lazy_val, push, Context, ContextCreator, FuncDesc, LazyBinding, ObjMember,4	ObjValue, Result, Val,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(args) = &b.params {20		let args = args.clone();21		(22			b.name.clone(),23			lazy_binding!(move |this, super_obj| Ok(lazy_val!(24				closure!(clone b, clone args, clone context_creator, || Ok(evaluate_method(25					context_creator.0(this.clone(), super_obj.clone())?,26					&b.value,27					args.clone()28				)))29			))),30		)31	} else {32		(33			b.name.clone(),34			lazy_binding!(move |this, super_obj| {35				Ok(lazy_val!(36					closure!(clone context_creator, clone b, || evaluate(37						context_creator.0(this.clone(), super_obj.clone())?,38						&b.value39					))40				))41			}),42		)43	}44}4546pub fn evaluate_method(ctx: Context, expr: &LocExpr, arg_spec: ParamsDesc) -> Val {47	Val::Func(FuncDesc {48		ctx,49		params: arg_spec,50		eval_rhs: function_rhs!(closure!(clone expr, |ctx| evaluate(ctx, &expr))),51		eval_default: function_default!(closure!(|ctx, default| evaluate(ctx, &default))),52	})53}5455pub fn evaluate_field_name(56	context: Context,57	field_name: &jsonnet_parser::FieldName,58) -> Result<String> {59	Ok(match field_name {60		jsonnet_parser::FieldName::Fixed(n) => n.clone(),61		jsonnet_parser::FieldName::Dyn(expr) => {62			evaluate(context, expr)?.try_cast_str("dynamic field name")?63		}64	})65}6667pub fn evaluate_unary_op(op: UnaryOpType, b: &Val) -> Result<Val> {68	Ok(match (op, b) {69		(o, Val::Lazy(l)) => evaluate_unary_op(o, &l.evaluate()?)?,70		(UnaryOpType::Not, Val::Bool(v)) => Val::Bool(!v),71		(UnaryOpType::Minus, Val::Num(n)) => Val::Num(-*n),72		(UnaryOpType::BitNot, Val::Num(n)) => Val::Num(!(*n as i32) as f64),73		(op, o) => panic!("unary op not implemented: {:?} {:?}", op, o),74	})75}7677pub(crate) fn evaluate_add_op(a: &Val, b: &Val) -> Result<Val> {78	Ok(match (a, b) {79		(Val::Str(v1), Val::Str(v2)) => Val::Str(v1.to_owned() + &v2),8081		(Val::Str(v1), Val::Num(v2)) => Val::Str(format!("{}{}", v1, v2)),82		(Val::Num(v1), Val::Str(v2)) => Val::Str(format!("{}{}", v1, v2)),83		(Val::Str(v1), Val::Bool(v2)) => Val::Str(format!("{}{}", v1, v2)),84		(Val::Bool(v1), Val::Str(v2)) => Val::Str(format!("{}{}", v1, v2)),85		(Val::Str(v1), Val::Null) => Val::Str(format!("{}null", v1)),86		(Val::Null, Val::Str(v2)) => Val::Str(format!("null{}", v2)),8788		(Val::Obj(v1), Val::Obj(v2)) => Val::Obj(v2.with_super(v1.clone())),89		(Val::Arr(a), Val::Arr(b)) => Val::Arr([&a[..], &b[..]].concat()),90		(Val::Num(v1), Val::Num(v2)) => Val::Num(v1 + v2),91		_ => panic!("can't add: {:?} and {:?}", a, b),92	})93}9495pub fn evaluate_binary_op_special(96	context: Context,97	a: &LocExpr,98	op: BinaryOpType,99	b: &LocExpr,100) -> Result<Val> {101	Ok(102		match (evaluate(context.clone(), &a)?.unwrap_if_lazy()?, op, b) {103			(Val::Bool(true), BinaryOpType::Or, _o) => Val::Bool(true),104			(Val::Bool(false), BinaryOpType::And, _o) => Val::Bool(false),105			(a, op, eb) => evaluate_binary_op_normal(106				context.clone(),107				&a,108				op,109				&evaluate(context, eb)?.unwrap_if_lazy()?,110			)?,111		},112	)113}114115pub fn evaluate_binary_op_normal(116	context: Context,117	a: &Val,118	op: BinaryOpType,119	b: &Val,120) -> Result<Val> {121	Ok(match (a, op, b) {122		(a, BinaryOpType::Add, b) => evaluate_add_op(a, b)?,123124		(Val::Str(v1), BinaryOpType::Ne, Val::Str(v2)) => Val::Bool(v1 != v2),125126		(Val::Str(v1), BinaryOpType::Mul, Val::Num(v2)) => Val::Str(v1.repeat(*v2 as usize)),127		(Val::Str(format), BinaryOpType::Mod, args) => evaluate(128			context129				.with_var("__tmp__format__".to_owned(), Val::Str(format.to_owned()))?130				.with_var(131					"__tmp__args__".to_owned(),132					match args {133						Val::Arr(v) => Val::Arr(v.clone()),134						v => Val::Arr(vec![v.clone()]),135					},136				)?,137			&el!(Expr::Apply(138				el!(Expr::Index(139					el!(Expr::Var("std".to_owned())),140					el!(Expr::Str("format".to_owned()))141				)),142				ArgsDesc(vec![143					Arg(None, el!(Expr::Var("__tmp__format__".to_owned()))),144					Arg(None, el!(Expr::Var("__tmp__args__".to_owned())))145				])146			)),147		)?,148149		(Val::Bool(a), BinaryOpType::And, Val::Bool(b)) => Val::Bool(*a && *b),150		(Val::Bool(a), BinaryOpType::Or, Val::Bool(b)) => Val::Bool(*a || *b),151152		(Val::Num(v1), BinaryOpType::Mul, Val::Num(v2)) => Val::Num(v1 * v2),153		(Val::Num(v1), BinaryOpType::Div, Val::Num(v2)) => Val::Num(v1 / v2),154		(Val::Num(v1), BinaryOpType::Mod, Val::Num(v2)) => Val::Num(v1 % v2),155156		(Val::Num(v1), BinaryOpType::Sub, Val::Num(v2)) => Val::Num(v1 - v2),157158		(Val::Num(v1), BinaryOpType::Lhs, Val::Num(v2)) => {159			Val::Num(((*v1 as i32) << (*v2 as i32)) as f64)160		}161		(Val::Num(v1), BinaryOpType::Rhs, Val::Num(v2)) => {162			Val::Num(((*v1 as i32) >> (*v2 as i32)) as f64)163		}164165		(Val::Str(v1), BinaryOpType::Lt, Val::Str(v2)) => Val::Bool(v1 < v2),166		(Val::Str(v1), BinaryOpType::Gt, Val::Str(v2)) => Val::Bool(v1 > v2),167		(Val::Str(v1), BinaryOpType::Lte, Val::Str(v2)) => Val::Bool(v1 <= v2),168		(Val::Str(v1), BinaryOpType::Gte, Val::Str(v2)) => Val::Bool(v1 >= v2),169170		(Val::Num(v1), BinaryOpType::Lt, Val::Num(v2)) => Val::Bool(v1 < v2),171		(Val::Num(v1), BinaryOpType::Gt, Val::Num(v2)) => Val::Bool(v1 > v2),172		(Val::Num(v1), BinaryOpType::Lte, Val::Num(v2)) => Val::Bool(v1 <= v2),173		(Val::Num(v1), BinaryOpType::Gte, Val::Num(v2)) => Val::Bool(v1 >= v2),174175		(Val::Num(v1), BinaryOpType::Eq, Val::Num(v2)) => Val::Bool((v1 - v2).abs() < f64::EPSILON),176		(Val::Num(v1), BinaryOpType::Ne, Val::Num(v2)) => Val::Bool((v1 - v2).abs() > f64::EPSILON),177178		(Val::Num(v1), BinaryOpType::BitAnd, Val::Num(v2)) => {179			Val::Num(((*v1 as i32) & (*v2 as i32)) as f64)180		}181		(Val::Num(v1), BinaryOpType::BitOr, Val::Num(v2)) => {182			Val::Num(((*v1 as i32) | (*v2 as i32)) as f64)183		}184		(Val::Num(v1), BinaryOpType::BitXor, Val::Num(v2)) => {185			Val::Num(((*v1 as i32) ^ (*v2 as i32)) as f64)186		}187		(a, BinaryOpType::Eq, b) => Val::Bool(a == b),188		(a, BinaryOpType::Ne, b) => Val::Bool(a != b),189		_ => panic!("no rules for binary operation: {:?} {:?} {:?}", a, op, b),190	})191}192193future_wrapper!(HashMap<String, LazyBinding>, FutureNewBindings);194future_wrapper!(ObjValue, FutureObjValue);195196pub fn evaluate_comp(197	context: Context,198	value: &LocExpr,199	specs: &[CompSpec],200) -> Result<Option<Vec<Val>>> {201	Ok(match specs.get(0) {202		None => Some(vec![evaluate(context, &value)?]),203		Some(CompSpec::IfSpec(IfSpecData(cond))) => {204			if evaluate(context.clone(), &cond)?.try_cast_bool("if spec")? {205				evaluate_comp(context, value, &specs[1..])?206			} else {207				None208			}209		}210		Some(CompSpec::ForSpec(ForSpecData(var, expr))) => {211			match evaluate(context.clone(), &expr)?.unwrap_if_lazy()? {212				Val::Arr(list) => {213					let mut out = Vec::new();214					for item in list {215						let item = item.clone();216						out.push(evaluate_comp(217							context.with_var(var.clone(), item)?,218							value,219							&specs[1..],220						)?);221					}222					Some(out.iter().flatten().flatten().cloned().collect())223				}224				_ => panic!("for expression evaluated to non-iterable value"),225			}226		}227	})228}229230// TODO: Asserts231pub fn evaluate_object(context: Context, object: ObjBody) -> Result<ObjValue> {232	Ok(match object {233		ObjBody::MemberList(members) => {234			let new_bindings = FutureNewBindings::new();235			let future_this = FutureObjValue::new();236			let context_creator = context_creator!(237				closure!(clone context, clone new_bindings, clone future_this, |this: Option<ObjValue>, super_obj: Option<ObjValue>| {238					Ok(context.clone().extend(239						new_bindings.clone().unwrap(),240						context.clone().dollar().clone().or_else(||this.clone()),241						Some(this.unwrap()),242						super_obj243					)?)244				})245			);246			{247				let mut bindings: HashMap<String, LazyBinding> = HashMap::new();248				for (n, b) in members249					.iter()250					.filter_map(|m| match m {251						Member::BindStmt(b) => Some(b.clone()),252						_ => None,253					})254					.map(|b| evaluate_binding(&b, context_creator.clone()))255				{256					bindings.insert(n, b);257				}258				new_bindings.fill(bindings);259			}260261			let mut new_members = BTreeMap::new();262			for member in members.into_iter() {263				match member {264					Member::Field(FieldMember {265						name,266						plus,267						params: None,268						visibility,269						value,270					}) => {271						let name = evaluate_field_name(context.clone(), &name)?;272						new_members.insert(273							name.clone(),274							ObjMember {275								add: plus,276								visibility: visibility.clone(),277								invoke: binding!(278									closure!(clone name, clone value, clone context_creator, |this, super_obj| {279										push(value.clone(), "object ".to_owned()+&name+" field", ||{280											let context = context_creator.0(this, super_obj)?;281											evaluate(282												context,283												&value,284											)?.unwrap_if_lazy()285										})286									})287								),288							},289						);290					}291					Member::Field(FieldMember {292						name,293						params: Some(params),294						value,295						..296					}) => {297						let name = evaluate_field_name(context.clone(), &name)?;298						new_members.insert(299							name,300							ObjMember {301								add: false,302								visibility: Visibility::Hidden,303								invoke: binding!(304									closure!(clone value, clone context_creator, |this, super_obj| {305										// TODO: Assert306										Ok(evaluate_method(307											context_creator.0(this, super_obj)?,308											&value.clone(),309											params.clone(),310										))311									})312								),313							},314						);315					}316					Member::BindStmt(_) => {}317					Member::AssertStmt(_) => {}318				}319			}320			future_this.fill(ObjValue::new(None, Rc::new(new_members)))321		}322		_ => todo!(),323	})324}325326pub fn evaluate(context: Context, expr: &LocExpr) -> Result<Val> {327	use Expr::*;328	let locexpr = expr.clone();329	let LocExpr(expr, loc) = expr;330	Ok(match &**expr {331		Literal(LiteralType::This) => Val::Obj(332			context333				.this()334				.clone()335				.unwrap_or_else(|| panic!("this not found")),336		),337		Literal(LiteralType::Super) => Val::Obj(338			context339				.super_obj()340				.clone()341				.unwrap_or_else(|| panic!("super not found")),342		),343		Literal(LiteralType::Dollar) => Val::Obj(344			context345				.dollar()346				.clone()347				.unwrap_or_else(|| panic!("dollar not found")),348		),349		Literal(LiteralType::True) => Val::Bool(true),350		Literal(LiteralType::False) => Val::Bool(false),351		Literal(LiteralType::Null) => Val::Null,352		Parened(e) => evaluate(context, e)?,353		Str(v) => Val::Str(v.clone()),354		Num(v) => Val::Num(*v),355		BinaryOp(v1, o, v2) => evaluate_binary_op_special(context, &v1, *o, &v2)?,356		UnaryOp(o, v) => evaluate_unary_op(*o, &evaluate(context, v)?)?,357		Var(name) => Val::Lazy(context.binding(&name)).unwrap_if_lazy()?,358		Index(value, index) => {359			match (360				evaluate(context.clone(), value)?.unwrap_if_lazy()?,361				evaluate(context.clone(), index)?,362			) {363				(Val::Obj(v), Val::Str(s)) => {364					if let Some(v) = v.get(&s)? {365						v.unwrap_if_lazy()?366					} else if let Some(Val::Str(n)) = v.get("__intristic_namespace__")? {367						Val::Intristic(n, s)368					} else {369						create_error(crate::Error::NoSuchField(s))?370					}371				}372				(Val::Arr(v), Val::Num(n)) => v373					.get(n as usize)374					.unwrap_or_else(|| panic!("out of bounds"))375					.clone(),376				(Val::Str(s), Val::Num(n)) => {377					Val::Str(s.chars().skip(n as usize).take(1).collect())378				}379				(v, i) => todo!("not implemented: {:?}[{:?}]", v, i.unwrap_if_lazy()),380			}381		}382		LocalExpr(bindings, returned) => {383			let mut new_bindings: HashMap<String, LazyBinding> = HashMap::new();384			let future_context = Context::new_future();385386			let context_creator = context_creator!(387				closure!(clone future_context, |_, _| Ok(future_context.clone().unwrap()))388			);389390			for (k, v) in bindings391				.iter()392				.map(|b| evaluate_binding(b, context_creator.clone()))393			{394				new_bindings.insert(k, v);395			}396397			let context = context398				.extend(new_bindings, None, None, None)?399				.into_future(future_context);400			evaluate(context, &returned.clone())?401		}402		Arr(items) => {403			let mut out = Vec::with_capacity(items.len());404			for item in items {405				out.push(evaluate(context.clone(), item)?);406			}407			Val::Arr(out)408		}409		ArrComp(expr, compspecs) => Val::Arr(410			// First compspec should be forspec, so no "None" possible here411			evaluate_comp(context, expr, compspecs)?.unwrap(),412		),413		Obj(body) => Val::Obj(evaluate_object(context, body.clone())?),414		Apply(value, ArgsDesc(args)) => {415			let value = evaluate(context.clone(), value)?.unwrap_if_lazy()?;416			match value {417				Val::Intristic(ns, name) => match (&ns as &str, &name as &str) {418					// arr/string/function419					("std", "length") => {420						assert_eq!(args.len(), 1);421						let expr = &args.get(0).unwrap().1;422						match evaluate(context, expr)? {423							Val::Str(n) => Val::Num(n.chars().count() as f64),424							Val::Arr(i) => Val::Num(i.len() as f64),425							v => panic!("can't get length of {:?}", v),426						}427					}428					// any429					("std", "type") => {430						assert_eq!(args.len(), 1);431						let expr = &args.get(0).unwrap().1;432						Val::Str(evaluate(context, expr)?.value_type()?.name().to_owned())433					}434					// length, idx=>any435					("std", "makeArray") => {436						assert_eq!(args.len(), 2);437						if let (Val::Num(v), Val::Func(d)) = (438							evaluate(context.clone(), &args[0].1)?,439							evaluate(context, &args[1].1)?,440						) {441							assert!(v > 0.0);442							let mut out = Vec::with_capacity(v as usize);443							for i in 0..v as usize {444								out.push(d.evaluate(vec![(None, Val::Num(i as f64))])?)445							}446							Val::Arr(out)447						} else {448							panic!("bad makeArray call");449						}450					}451					// string452					("std", "codepoint") => {453						assert_eq!(args.len(), 1);454						if let Val::Str(s) = evaluate(context, &args[0].1)? {455							assert!(456								s.chars().count() == 1,457								"std.codepoint should receive single char string"458							);459							Val::Num(s.chars().take(1).next().unwrap() as u32 as f64)460						} else {461							panic!("bad codepoint call");462						}463					}464					// object, includeHidden465					("std", "objectFieldsEx") => {466						assert_eq!(args.len(), 2);467						if let (Val::Obj(body), Val::Bool(_include_hidden)) = (468							evaluate(context.clone(), &args[0].1)?,469							evaluate(context, &args[1].1)?,470						) {471							// TODO: handle visibility (_include_hidden)472							Val::Arr(body.fields().into_iter().map(Val::Str).collect())473						} else {474							panic!("bad objectFieldsEx call");475						}476					}477					(ns, name) => panic!("Intristic not found: {}.{}", ns, name),478				},479				Val::Func(f) => push(locexpr.clone(), "function call".to_owned(), || {480					f.evaluate(481						args.clone()482							.into_iter()483							.map(move |a| {484								(485									a.clone().0,486									Val::Lazy(lazy_val!(487										closure!(clone context, clone a, || evaluate(context.clone(), &a.clone().1))488									)),489								)490							})491							.collect(),492					)493				})?,494				_ => panic!("{:?} is not a function", value),495			}496		}497		Function(params, body) => evaluate_method(context, body, params.clone()),498		AssertExpr(AssertStmt(value, msg), returned) => {499			if push(value.clone(), "assertion condition".to_owned(), || {500				evaluate(context.clone(), &value)?501					.try_cast_bool("assertion condition should be boolean")502			})? {503				push(504					returned.clone(),505					"assert 'return' branch".to_owned(),506					|| evaluate(context, returned),507				)?508			} else if let Some(msg) = msg {509				panic!(510					"assertion failed ({:?}): {}",511					value,512					evaluate(context, msg)?.try_cast_str("assertion message should be string")?513				);514			} else {515				panic!("assertion failed ({:?}): no message", value);516			}517		}518		Error(e) => create_error(crate::Error::RuntimeError(519			evaluate(context, e)?.try_cast_str("error text should be string")?,520		))?,521		IfElse {522			cond,523			cond_then,524			cond_else,525		} => {526			if push(cond.0.clone(), "if condition".to_owned(), || {527				evaluate(context.clone(), &cond.0)?.try_cast_bool("if condition should be boolean")528			})? {529				push(530					cond_then.clone(),531					"if condition 'then' branch".to_owned(),532					|| evaluate(context, cond_then),533				)?534			} else {535				match cond_else {536					Some(v) => push(v.clone(), "if condition 'else' branch".to_owned(), || {537						evaluate(context, v)538					})?,539					None => Val::Bool(false),540				}541			}542		}543		_ => panic!(544			"evaluation not implemented: {:?}",545			LocExpr(expr.clone(), loc.clone())546		),547	})548}