git.delta.rocks / jrsonnet / refs/commits / 3b72cd84a927

1use peg::parser;2use std::{path::PathBuf, rc::Rc};3mod expr;4pub use expr::*;5pub use peg;67#[derive(Default)]8pub struct ParserSettings {9	pub loc_data: bool,10	pub file_name: Rc<PathBuf>,11}1213parser! {14	grammar jsonnet_parser() for str {15		use peg::ParseLiteral;1617		/// Standard C-like comments18		rule comment()19			= "//" (!['\n'][_])* "\n"20			/ "/*" ("\\*/" / "\\\\" / (!("*/")[_]))* "*/"21			/ "#" (!['\n'][_])* "\n"2223		rule single_whitespace() = quiet!{([' ' | '\r' | '\n' | '\t'] / comment())} / expected!("<whitespace>")24		rule _() = single_whitespace()*2526		/// For comma-delimited elements27		rule comma() = quiet!{_ "," _} / expected!("<comma>")28		rule alpha() -> char = c:$(['_' | 'a'..='z' | 'A'..='Z']) {c.chars().next().unwrap()}29		rule digit() -> char = d:$(['0'..='9']) {d.chars().next().unwrap()}30		rule end_of_ident() = !['0'..='9' | '_' | 'a'..='z' | 'A'..='Z']31		/// Sequence of digits32		rule uint() -> u64 = a:$(digit()+) { a.parse().unwrap() }33		/// Number in scientific notation format34		rule number() -> f64 = quiet!{a:$(uint() ("." uint())? (['e'|'E'] (s:['+'|'-'])? uint())?) { a.parse().unwrap() }} / expected!("<number>")3536		/// Reserved word followed by any non-alphanumberic37		rule reserved() = ("assert" / "else" / "error" / "false" / "for" / "function" / "if" / "import" / "importstr" / "in" / "local" / "null" / "tailstrict" / "then" / "self" / "super" / "true") end_of_ident()38		rule id() = quiet!{ !reserved() alpha() (alpha() / digit())*} / expected!("<identifier>")3940		rule keyword(id: &'static str) -> ()41			= ##parse_string_literal(id) end_of_ident()42		// Adds location data information to existing expression43		rule l(s: &ParserSettings, x: rule<Expr>) -> LocExpr44			= start:position!() v:x() end:position!() {loc_expr!(v, s.loc_data, (s.file_name.clone(), start, end))}4546		pub rule param(s: &ParserSettings) -> expr::Param = name:$(id()) expr:(_ "=" _ expr:expr(s){expr})? { expr::Param(name.into(), expr) }47		pub rule params(s: &ParserSettings) -> expr::ParamsDesc48			= params:param(s) ** comma() comma()? {49				let mut defaults_started = false;50				for param in &params {51					defaults_started = defaults_started || param.1.is_some();52					assert_eq!(defaults_started, param.1.is_some(), "defauld parameters should be used after all positionals");53				}54				expr::ParamsDesc(Rc::new(params))55			}56			/ { expr::ParamsDesc(Rc::new(Vec::new())) }5758		pub rule arg(s: &ParserSettings) -> expr::Arg59			= name:$(id()) _ "=" _ expr:expr(s) {expr::Arg(Some(name.into()), expr)}60			/ expr:expr(s) {expr::Arg(None, expr)}61		pub rule args(s: &ParserSettings) -> expr::ArgsDesc62			= args:arg(s) ** comma() comma()? {63				let mut named_started = false;64				for arg in &args {65					named_started = named_started || arg.0.is_some();66					assert_eq!(named_started, arg.0.is_some(), "named args should be used after all positionals");67				}68				expr::ArgsDesc(args)69			}70			/ { expr::ArgsDesc(Vec::new()) }7172		pub rule bind(s: &ParserSettings) -> expr::BindSpec73			= name:$(id()) _ "=" _ expr:expr(s) {expr::BindSpec{name:name.into(), params: None, value: expr}}74			/ name:$(id()) _ "(" _ params:params(s) _ ")" _ "=" _ expr:expr(s) {expr::BindSpec{name:name.into(), params: Some(params), value: expr}}75		pub rule assertion(s: &ParserSettings) -> expr::AssertStmt76			= keyword("assert") _ cond:expr(s) msg:(_ ":" _ e:expr(s) {e})? { expr::AssertStmt(cond, msg) }7778		pub rule whole_line() -> &'input str79			= str:$((!['\n'][_])* "\n") {str}80		pub rule string_block() -> String81			= "|||" (!['\n']single_whitespace())* "\n"82			  empty_lines:$(['\n']*)83			  prefix:[' ' | '\t']+ first_line:whole_line()84			  lines:("\n" {"\n"} / [' ' | '\t']*<{prefix.len()}> s:whole_line() {s})*85			  [' ' | '\t']*<, {prefix.len() - 1}> "|||"86			  {let mut l = empty_lines.to_owned(); l.push_str(first_line); l.extend(lines); l}87		pub rule string() -> String88			= quiet!{ "\"" str:$(("\\\"" / "\\\\" / (!['"'][_]))*) "\"" {unescape::unescape(str).unwrap()}89			/ "'" str:$(("\\'" / "\\\\" / (!['\''][_]))*) "'" {unescape::unescape(str).unwrap()}90			/ "@'" str:$(("''" / (!['\''][_]))*) "'" {str.replace("''", "'")}91			/ "@\"" str:$(("\"\"" / (!['"'][_]))*) "\"" {str.replace("\"\"", "\"")}92			/ string_block() } / expected!("<string>")9394		pub rule field_name(s: &ParserSettings) -> expr::FieldName95			= name:$(id()) {expr::FieldName::Fixed(name.into())}96			/ name:string() {expr::FieldName::Fixed(name.into())}97			/ "[" _ expr:expr(s) _ "]" {expr::FieldName::Dyn(expr)}98		pub rule visibility() -> expr::Visibility99			= ":::" {expr::Visibility::Unhide}100			/ "::" {expr::Visibility::Hidden}101			/ ":" {expr::Visibility::Normal}102		pub rule field(s: &ParserSettings) -> expr::FieldMember103			= name:field_name(s) _ plus:"+"? _ visibility:visibility() _ value:expr(s) {expr::FieldMember{104				name,105				plus: plus.is_some(),106				params: None,107				visibility,108				value,109			}}110			/ name:field_name(s) _ "(" _ params:params(s) _ ")" _ visibility:visibility() _ value:expr(s) {expr::FieldMember{111				name,112				plus: false,113				params: Some(params),114				visibility,115				value,116			}}117		pub rule obj_local(s: &ParserSettings) -> BindSpec118			= keyword("local") _ bind:bind(s) {bind}119		pub rule member(s: &ParserSettings) -> expr::Member120			= bind:obj_local(s) {expr::Member::BindStmt(bind)}121			/ assertion:assertion(s) {expr::Member::AssertStmt(assertion)}122			/ field:field(s) {expr::Member::Field(field)}123		pub rule objinside(s: &ParserSettings) -> expr::ObjBody124			= pre_locals:(b: obj_local(s) comma() {b})* "[" _ key:expr(s) _ "]" _ ":" _ value:expr(s) post_locals:(comma() b:obj_local(s) {b})* _ forspec:forspec(s) others:(_ rest:compspec(s) {rest})? {125				let mut compspecs = vec![CompSpec::ForSpec(forspec)];126				compspecs.extend(others.unwrap_or_default());127				expr::ObjBody::ObjComp(expr::ObjComp{128					pre_locals,129					key,130					value,131					post_locals,132					compspecs,133				})134			}135			/ members:(member(s) ** comma()) comma()? {expr::ObjBody::MemberList(members)}136		pub rule ifspec(s: &ParserSettings) -> IfSpecData137			= keyword("if") _ expr:expr(s) {IfSpecData(expr)}138		pub rule forspec(s: &ParserSettings) -> ForSpecData139			= keyword("for") _ id:$(id()) _ keyword("in") _ cond:expr(s) {ForSpecData(id.into(), cond)}140		pub rule compspec(s: &ParserSettings) -> Vec<expr::CompSpec>141			= s:(i:ifspec(s) { expr::CompSpec::IfSpec(i) } / f:forspec(s) {expr::CompSpec::ForSpec(f)} ) ** _ {s}142		pub rule local_expr(s: &ParserSettings) -> LocExpr143			= l(s,<keyword("local") _ binds:bind(s) ** comma() _ ";" _ expr:expr(s) { Expr::LocalExpr(binds, expr) }>)144		pub rule string_expr(s: &ParserSettings) -> LocExpr145			= l(s, <s:string() {Expr::Str(s.into())}>)146		pub rule obj_expr(s: &ParserSettings) -> LocExpr147			= l(s,<"{" _ body:objinside(s) _ "}" {Expr::Obj(body)}>)148		pub rule array_expr(s: &ParserSettings) -> LocExpr149			= l(s,<"[" _ elems:(expr(s) ** comma()) _ comma()? "]" {Expr::Arr(elems)}>)150		pub rule array_comp_expr(s: &ParserSettings) -> LocExpr151			= l(s,<"[" _ expr:expr(s) _ comma()? _ forspec:forspec(s) _ others:(others: compspec(s) _ {others})? "]" {152				let mut specs = vec![CompSpec::ForSpec(forspec)];153				specs.extend(others.unwrap_or_default());154				Expr::ArrComp(expr, specs)155			}>)156		pub rule number_expr(s: &ParserSettings) -> LocExpr157			= l(s,<n:number() { expr::Expr::Num(n) }>)158		pub rule var_expr(s: &ParserSettings) -> LocExpr159			= l(s,<n:$(id()) { expr::Expr::Var(n.into()) }>)160		pub rule if_then_else_expr(s: &ParserSettings) -> LocExpr161			= l(s,<cond:ifspec(s) _ keyword("then") _ cond_then:expr(s) cond_else:(_ keyword("else") _ e:expr(s) {e})? {Expr::IfElse{162				cond,163				cond_then,164				cond_else,165			}}>)166167		pub rule literal(s: &ParserSettings) -> LocExpr168			= l(s,<v:(169				keyword("null") {LiteralType::Null}170				/ keyword("true") {LiteralType::True}171				/ keyword("false") {LiteralType::False}172				/ keyword("self") {LiteralType::This}173				/ keyword("$") {LiteralType::Dollar}174				/ keyword("super") {LiteralType::Super}175			) {Expr::Literal(v)}>)176177		pub rule expr_basic(s: &ParserSettings) -> LocExpr178			= literal(s)179180			/ string_expr(s) / number_expr(s)181			/ array_expr(s)182			/ obj_expr(s)183			/ array_expr(s)184			/ array_comp_expr(s)185186			/ l(s,<keyword("importstr") _ path:string() {Expr::ImportStr(PathBuf::from(path))}>)187			/ l(s,<keyword("import") _ path:string() {Expr::Import(PathBuf::from(path))}>)188189			/ var_expr(s)190			/ local_expr(s)191			/ if_then_else_expr(s)192193			/ l(s,<keyword("function") _ "(" _ params:params(s) _ ")" _ expr:expr(s) {Expr::Function(params, expr)}>)194			/ l(s,<assertion:assertion(s) _ ";" _ expr:expr(s) { Expr::AssertExpr(assertion, expr) }>)195196			/ l(s,<keyword("error") _ expr:expr(s) { Expr::ErrorStmt(expr) }>)197198		rule slice_part(s: &ParserSettings) -> Option<LocExpr>199			= e:(_ e:expr(s) _{e})? {e}200		pub rule slice_desc(s: &ParserSettings) -> SliceDesc201			= start:slice_part(s) ":" pair:(end:slice_part(s) step:(":" e:slice_part(s){e})? {(end, step.flatten())})? {202				let (end, step) = if let Some((end, step)) = pair {203					(end, step)204				}else{205					(None, None)206				};207208				SliceDesc { start, end, step }209			}210211		rule binop(x: rule<()>) -> ()212			= quiet!{ x() } / expected!("<binary op>")213		rule unaryop(x: rule<()>) -> ()214			= quiet!{ x() } / expected!("<unary op>")215216		rule expr(s: &ParserSettings) -> LocExpr217			= start:position!() a:precedence! {218				a:(@) _ binop(<"||">) _ b:@ {loc_expr_todo!(Expr::BinaryOp(a, BinaryOpType::Or, b))}219				--220				a:(@) _ binop(<"&&">) _ b:@ {loc_expr_todo!(Expr::BinaryOp(a, BinaryOpType::And, b))}221				--222				a:(@) _ binop(<"|">) _ b:@ {loc_expr_todo!(Expr::BinaryOp(a, BinaryOpType::BitOr, b))}223				--224				a:@ _ binop(<"^">) _ b:(@) {loc_expr_todo!(Expr::BinaryOp(a, BinaryOpType::BitXor, b))}225				--226				a:(@) _ binop(<"&">) _ b:@ {loc_expr_todo!(Expr::BinaryOp(a, BinaryOpType::BitAnd, b))}227				--228				a:(@) _ binop(<"==">) _ b:@ {loc_expr_todo!(Expr::Apply(229					el!(Expr::Intrinsic("equals".into())),230					ArgsDesc(vec![Arg(None, a), Arg(None, b)]),231					true232				))}233				a:(@) _ binop(<"!=">) _ b:@ {loc_expr_todo!(Expr::UnaryOp(UnaryOpType::Not, el!(Expr::Apply(234					el!(Expr::Intrinsic("equals".into())),235					ArgsDesc(vec![Arg(None, a), Arg(None, b)]),236					true237				))))}238				--239				a:(@) _ binop(<"<">) _ b:@ {loc_expr_todo!(Expr::BinaryOp(a, BinaryOpType::Lt, b))}240				a:(@) _ binop(<">">) _ b:@ {loc_expr_todo!(Expr::BinaryOp(a, BinaryOpType::Gt, b))}241				a:(@) _ binop(<"<=">) _ b:@ {loc_expr_todo!(Expr::BinaryOp(a, BinaryOpType::Lte, b))}242				a:(@) _ binop(<">=">) _ b:@ {loc_expr_todo!(Expr::BinaryOp(a, BinaryOpType::Gte, b))}243				a:(@) _ binop(<keyword("in")>) _ b:@ {loc_expr_todo!(Expr::Apply(244					el!(Expr::Intrinsic("objectHasEx".into())), ArgsDesc(vec![Arg(None, b), Arg(None, a), Arg(None, el!(Expr::Literal(LiteralType::True)))]),245					true246				))}247				--248				a:(@) _ binop(<"<<">) _ b:@ {loc_expr_todo!(Expr::BinaryOp(a, BinaryOpType::Lhs, b))}249				a:(@) _ binop(<">>">) _ b:@ {loc_expr_todo!(Expr::BinaryOp(a, BinaryOpType::Rhs, b))}250				--251				a:(@) _ binop(<"+">) _ b:@ {loc_expr_todo!(Expr::BinaryOp(a, BinaryOpType::Add, b))}252				a:(@) _ binop(<"-">) _ b:@ {loc_expr_todo!(Expr::BinaryOp(a, BinaryOpType::Sub, b))}253				--254				a:(@) _ binop(<"*">) _ b:@ {loc_expr_todo!(Expr::BinaryOp(a, BinaryOpType::Mul, b))}255				a:(@) _ binop(<"/">) _ b:@ {loc_expr_todo!(Expr::BinaryOp(a, BinaryOpType::Div, b))}256				a:(@) _ binop(<"%">) _ b:@ {loc_expr_todo!(Expr::Apply(257					el!(Expr::Intrinsic("mod".into())), ArgsDesc(vec![Arg(None, a), Arg(None, b)]),258					false259				))}260				--261						unaryop(<"-">) _ b:@ {loc_expr_todo!(Expr::UnaryOp(UnaryOpType::Minus, b))}262						unaryop(<"!">) _ b:@ {loc_expr_todo!(Expr::UnaryOp(UnaryOpType::Not, b))}263						unaryop(<"~">) _ b:@ { loc_expr_todo!(Expr::UnaryOp(UnaryOpType::BitNot, b)) }264				--265				a:(@) _ "[" _ s:slice_desc(s) _ "]" {loc_expr_todo!(Expr::Apply(266					el!(Expr::Intrinsic("slice".into())),267					ArgsDesc(vec![268						Arg(None, a),269						Arg(None, s.start.unwrap_or_else(||el!(Expr::Literal(LiteralType::Null)))),270						Arg(None, s.end.unwrap_or_else(||el!(Expr::Literal(LiteralType::Null)))),271						Arg(None, s.step.unwrap_or_else(||el!(Expr::Literal(LiteralType::Null)))),272					]),273					true,274				))}275				a:(@) _ "." _ s:$(id()) {loc_expr_todo!(Expr::Index(a, el!(Expr::Str(s.into()))))}276				a:(@) _ "[" _ s:expr(s) _ "]" {loc_expr_todo!(Expr::Index(a, s))}277				a:(@) _ "(" _ args:args(s) _ ")" ts:(_ keyword("tailstrict"))? {loc_expr_todo!(Expr::Apply(a, args, ts.is_some()))}278				a:(@) _ "{" _ body:objinside(s) _ "}" {loc_expr_todo!(Expr::ObjExtend(a, body))}279				--280				e:expr_basic(s) {e}281				"(" _ e:expr(s) _ ")" {loc_expr_todo!(Expr::Parened(e))}282			} end:position!() {283				let LocExpr(e, _) = a;284				LocExpr(e, if s.loc_data {285					Some(ExprLocation(s.file_name.clone(), start, end))286				} else {287					None288				})289			}290			/ e:expr_basic(s) {e}291292		pub rule jsonnet(s: &ParserSettings) -> LocExpr = _ e:expr(s) _ {e}293	}294}295296pub type ParseError = peg::error::ParseError<peg::str::LineCol>;297pub fn parse(str: &str, settings: &ParserSettings) -> Result<LocExpr, ParseError> {298	jsonnet_parser::jsonnet(str, settings)299}300301#[macro_export]302macro_rules! el {303	($expr:expr) => {304		LocExpr(std::rc::Rc::new($expr), None)305	};306}307308#[cfg(test)]309pub mod tests {310	use super::{expr::*, parse};311	use crate::ParserSettings;312	use std::path::PathBuf;313	use std::rc::Rc;314315	macro_rules! parse {316		($s:expr) => {317			parse(318				$s,319				&ParserSettings {320					loc_data: false,321					file_name: Rc::new(PathBuf::from("/test.jsonnet")),322					},323				)324			.unwrap()325		};326	}327328	mod expressions {329		use super::*;330331		pub fn basic_math() -> LocExpr {332			el!(Expr::BinaryOp(333				el!(Expr::Num(2.0)),334				BinaryOpType::Add,335				el!(Expr::BinaryOp(336					el!(Expr::Num(2.0)),337					BinaryOpType::Mul,338					el!(Expr::Num(2.0)),339				)),340			))341		}342	}343344	#[test]345	fn multiline_string() {346		assert_eq!(347			parse!("|||\n    Hello world!\n     a\n|||"),348			el!(Expr::Str("Hello world!\n a\n".into())),349		);350		assert_eq!(351			parse!("|||\n  Hello world!\n   a\n|||"),352			el!(Expr::Str("Hello world!\n a\n".into())),353		);354		assert_eq!(355			parse!("|||\n\t\tHello world!\n\t\t\ta\n|||"),356			el!(Expr::Str("Hello world!\n\ta\n".into())),357		);358		assert_eq!(359			parse!("|||\n   Hello world!\n    a\n |||"),360			el!(Expr::Str("Hello world!\n a\n".into())),361		);362	}363364	#[test]365	fn slice() {366		parse!("a[1:]");367		parse!("a[1::]");368		parse!("a[:1:]");369		parse!("a[::1]");370		parse!("str[:len - 1]");371	}372373	#[test]374	fn string_escaping() {375		assert_eq!(376			parse!(r#""Hello, \"world\"!""#),377			el!(Expr::Str(r#"Hello, "world"!"#.into())),378		);379		assert_eq!(380			parse!(r#"'Hello \'world\'!'"#),381			el!(Expr::Str("Hello 'world'!".into())),382		);383		assert_eq!(parse!(r#"'\\\\'"#), el!(Expr::Str("\\\\".into())),);384	}385386	#[test]387	fn string_unescaping() {388		assert_eq!(389			parse!(r#""Hello\nWorld""#),390			el!(Expr::Str("Hello\nWorld".into())),391		);392	}393394	#[test]395	fn string_verbantim() {396		assert_eq!(397			parse!(r#"@"Hello\n""World""""#),398			el!(Expr::Str("Hello\\n\"World\"".into())),399		);400	}401402	#[test]403	fn imports() {404		assert_eq!(405			parse!("import \"hello\""),406			el!(Expr::Import(PathBuf::from("hello"))),407		);408		assert_eq!(409			parse!("importstr \"garnish.txt\""),410			el!(Expr::ImportStr(PathBuf::from("garnish.txt")))411		);412	}413414	#[test]415	fn empty_object() {416		assert_eq!(parse!("{}"), el!(Expr::Obj(ObjBody::MemberList(vec![]))));417	}418419	#[test]420	fn basic_math() {421		assert_eq!(422			parse!("2+2*2"),423			el!(Expr::BinaryOp(424				el!(Expr::Num(2.0)),425				BinaryOpType::Add,426				el!(Expr::BinaryOp(427					el!(Expr::Num(2.0)),428					BinaryOpType::Mul,429					el!(Expr::Num(2.0))430				))431			))432		);433	}434435	#[test]436	fn basic_math_with_indents() {437		assert_eq!(parse!("2	+ 	  2	  *	2   	"), expressions::basic_math());438	}439440	#[test]441	fn basic_math_parened() {442		assert_eq!(443			parse!("2+(2+2*2)"),444			el!(Expr::BinaryOp(445				el!(Expr::Num(2.0)),446				BinaryOpType::Add,447				el!(Expr::Parened(expressions::basic_math())),448			))449		);450	}451452	/// Comments should not affect parsing453	#[test]454	fn comments() {455		assert_eq!(456			parse!("2//comment\n+//comment\n3/*test*/*/*test*/4"),457			el!(Expr::BinaryOp(458				el!(Expr::Num(2.0)),459				BinaryOpType::Add,460				el!(Expr::BinaryOp(461					el!(Expr::Num(3.0)),462					BinaryOpType::Mul,463					el!(Expr::Num(4.0))464				))465			))466		);467	}468469	/// Comments should be able to be escaped470	#[test]471	fn comment_escaping() {472		assert_eq!(473			parse!("2/*\\*/+*/ - 22"),474			el!(Expr::BinaryOp(475				el!(Expr::Num(2.0)),476				BinaryOpType::Sub,477				el!(Expr::Num(22.0))478			))479		);480	}481482	#[test]483	fn suffix() {484		// assert_eq!(parse!("std.test"), el!(Expr::Num(2.2)));485		// assert_eq!(parse!("std(2)"), el!(Expr::Num(2.2)));486		// assert_eq!(parse!("std.test(2)"), el!(Expr::Num(2.2)));487		// assert_eq!(parse!("a[b]"), el!(Expr::Num(2.2)))488	}489490	#[test]491	fn array_comp() {492		use Expr::*;493		assert_eq!(494			parse!("[std.deepJoin(x) for x in arr]"),495			el!(ArrComp(496				el!(Apply(497					el!(Index(el!(Var("std".into())), el!(Str("deepJoin".into())))),498					ArgsDesc(vec![Arg(None, el!(Var("x".into())))]),499					false,500				)),501				vec![CompSpec::ForSpec(ForSpecData(502					"x".into(),503					el!(Var("arr".into()))504				))]505			)),506		)507	}508509	#[test]510	fn reserved() {511		use Expr::*;512		assert_eq!(parse!("null"), el!(Literal(LiteralType::Null)));513		assert_eq!(parse!("nulla"), el!(Var("nulla".into())));514	}515516	#[test]517	fn multiple_args_buf() {518		parse!("a(b, null_fields)");519	}520521	#[test]522	fn infix_precedence() {523		use Expr::*;524		assert_eq!(525			parse!("!a && !b"),526			el!(BinaryOp(527				el!(UnaryOp(UnaryOpType::Not, el!(Var("a".into())))),528				BinaryOpType::And,529				el!(UnaryOp(UnaryOpType::Not, el!(Var("b".into()))))530			))531		);532	}533534	#[test]535	fn infix_precedence_division() {536		use Expr::*;537		assert_eq!(538			parse!("!a / !b"),539			el!(BinaryOp(540				el!(UnaryOp(UnaryOpType::Not, el!(Var("a".into())))),541				BinaryOpType::Div,542				el!(UnaryOp(UnaryOpType::Not, el!(Var("b".into()))))543			))544		);545	}546547	#[test]548	fn double_negation() {549		use Expr::*;550		assert_eq!(551			parse!("!!a"),552			el!(UnaryOp(553				UnaryOpType::Not,554				el!(UnaryOp(UnaryOpType::Not, el!(Var("a".into()))))555			))556		)557	}558559	#[test]560	fn array_test_error() {561		parse!("[a for a in b if c for e in f]");562		//                    ^^^^ failed code563	}564565	#[test]566	fn can_parse_stdlib() {567		parse!(jrsonnet_stdlib::STDLIB_STR);568	}569570	// From source code571	/*572	#[bench]573	fn bench_parse_peg(b: &mut Bencher) {574		b.iter(|| parse!(jrsonnet_stdlib::STDLIB_STR))575	}576	*/577}