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-rw-r--r--dhall_syntax/src/parser.rs423
1 files changed, 177 insertions, 246 deletions
diff --git a/dhall_syntax/src/parser.rs b/dhall_syntax/src/parser.rs
index c2ba19a..bd29a27 100644
--- a/dhall_syntax/src/parser.rs
+++ b/dhall_syntax/src/parser.rs
@@ -66,11 +66,15 @@ impl<'input> ParseInput<'input, Rule> {
fn as_str(&self) -> &'input str {
self.pair.as_str()
}
+ fn as_rule(&self) -> Rule {
+ self.pair.as_rule()
+ }
}
-// Used to retrieve the `Rule` enum associated with the `Self` type in `parse_children`.
+// Used by the macros.
trait PestConsumer {
- type RuleEnum: pest::RuleType;
+ type Rule: pest::RuleType;
+ fn rule_alias(rule: Self::Rule) -> String;
}
fn debug_pair(pair: Pair<Rule>) -> String {
@@ -231,21 +235,17 @@ struct Parsers;
#[make_parser(Rule)]
impl Parsers {
- fn EOI(_: ParseInput<Rule>) -> ParseResult<()> {
+ fn EOI(_input: ParseInput<Rule>) -> ParseResult<()> {
Ok(())
}
+ #[alias(label)]
fn simple_label(input: ParseInput<Rule>) -> ParseResult<Label> {
- Ok(Label::from(input.as_str().trim().to_owned()))
+ Ok(Label::from(input.as_str()))
}
+ #[alias(label)]
fn quoted_label(input: ParseInput<Rule>) -> ParseResult<Label> {
- Ok(Label::from(input.as_str().trim().to_owned()))
- }
- fn label(input: ParseInput<Rule>) -> ParseResult<Label> {
- Ok(parse_children!(input;
- [simple_label(l)] => l,
- [quoted_label(l)] => l,
- ))
+ Ok(Label::from(input.as_str()))
}
fn double_quote_literal<E: Clone>(
@@ -262,17 +262,15 @@ impl Parsers {
input: ParseInput<Rule>,
) -> ParseResult<ParsedTextContents<E>> {
Ok(parse_children!(input;
- [interpolation(e)] => {
+ [expression(e)] => {
InterpolatedTextContents::Expr(e)
},
- [double_quote_escaped(s)] => {
- InterpolatedTextContents::Text(s)
- },
[double_quote_char(s)] => {
- InterpolatedTextContents::Text(s.to_owned())
+ InterpolatedTextContents::Text(s)
},
))
}
+ #[alias(double_quote_char)]
fn double_quote_escaped(input: ParseInput<Rule>) -> ParseResult<String> {
Ok(match input.as_str() {
"\"" => "\"".to_owned(),
@@ -345,8 +343,8 @@ impl Parsers {
}
fn double_quote_char<'a>(
input: ParseInput<'a, Rule>,
- ) -> ParseResult<&'a str> {
- Ok(input.as_str())
+ ) -> ParseResult<String> {
+ Ok(input.as_str().to_owned())
}
fn single_quote_literal<E: Clone>(
@@ -356,6 +354,7 @@ impl Parsers {
[single_quote_continue(lines)] => {
let newline: ParsedText<E> = "\n".to_string().into();
+ // Reverse lines and chars in each line
let mut lines: Vec<ParsedText<E>> = lines
.into_iter()
.rev()
@@ -377,44 +376,27 @@ impl Parsers {
) -> ParseResult<&'a str> {
Ok(input.as_str())
}
- fn escaped_quote_pair<'a>(_: ParseInput<'a, Rule>) -> ParseResult<&'a str> {
+ #[alias(single_quote_char)]
+ fn escaped_quote_pair<'a>(
+ _input: ParseInput<'a, Rule>,
+ ) -> ParseResult<&'a str> {
Ok("''")
}
+ #[alias(single_quote_char)]
fn escaped_interpolation<'a>(
- _: ParseInput<'a, Rule>,
+ _input: ParseInput<'a, Rule>,
) -> ParseResult<&'a str> {
Ok("${")
}
- fn interpolation<E: Clone>(
- input: ParseInput<Rule>,
- ) -> ParseResult<Expr<E>> {
- Ok(parse_children!(input;
- [expression(e)] => e
- ))
- }
// Returns a vec of lines in reversed order, where each line is also in reversed order.
fn single_quote_continue<E: Clone>(
input: ParseInput<Rule>,
) -> ParseResult<Vec<Vec<ParsedTextContents<E>>>> {
Ok(parse_children!(input;
- [interpolation(c), single_quote_continue(lines)] => {
- let c = InterpolatedTextContents::Expr(c);
- let mut lines = lines;
- lines.last_mut().unwrap().push(c);
- lines
- },
- [escaped_quote_pair(c), single_quote_continue(lines)] => {
- let mut lines = lines;
- // TODO: don't allocate for every char
- let c = InterpolatedTextContents::Text(c.to_owned());
- lines.last_mut().unwrap().push(c);
- lines
- },
- [escaped_interpolation(c), single_quote_continue(lines)] => {
+ [expression(e), single_quote_continue(lines)] => {
+ let c = InterpolatedTextContents::Expr(e);
let mut lines = lines;
- // TODO: don't allocate for every char
- let c = InterpolatedTextContents::Text(c.to_owned());
lines.last_mut().unwrap().push(c);
lines
},
@@ -435,38 +417,41 @@ impl Parsers {
))
}
+ #[alias(expression)]
fn builtin<E: Clone>(input: ParseInput<Rule>) -> ParseResult<Expr<E>> {
let s = input.as_str();
- let span = input.as_span();
- Ok(spanned(
- span,
- match crate::Builtin::parse(s) {
- Some(b) => Builtin(b),
- None => {
- match s {
- "True" => BoolLit(true),
- "False" => BoolLit(false),
- "Type" => Const(crate::Const::Type),
- "Kind" => Const(crate::Const::Kind),
- "Sort" => Const(crate::Const::Sort),
- _ => Err(input
- .error(format!("Unrecognized builtin: '{}'", s)))?,
- }
- }
+ let e = match crate::Builtin::parse(s) {
+ Some(b) => Builtin(b),
+ None => match s {
+ "True" => BoolLit(true),
+ "False" => BoolLit(false),
+ "Type" => Const(crate::Const::Type),
+ "Kind" => Const(crate::Const::Kind),
+ "Sort" => Const(crate::Const::Sort),
+ _ => Err(input.error(format!("Unrecognized builtin: '{}'", s)))?,
},
- ))
+ };
+ Ok(spanned(input.as_span(), e))
}
- fn NaN(_: ParseInput<Rule>) -> ParseResult<()> {
- Ok(())
+ #[alias(double_literal)]
+ fn NaN(_input: ParseInput<Rule>) -> ParseResult<core::Double> {
+ Ok(std::f64::NAN.into())
}
- fn minus_infinity_literal(_: ParseInput<Rule>) -> ParseResult<()> {
- Ok(())
+ #[alias(double_literal)]
+ fn minus_infinity_literal(
+ _input: ParseInput<Rule>,
+ ) -> ParseResult<core::Double> {
+ Ok(std::f64::NEG_INFINITY.into())
}
- fn plus_infinity_literal(_: ParseInput<Rule>) -> ParseResult<()> {
- Ok(())
+ #[alias(double_literal)]
+ fn plus_infinity_literal(
+ _input: ParseInput<Rule>,
+ ) -> ParseResult<core::Double> {
+ Ok(std::f64::INFINITY.into())
}
+ #[alias(double_literal)]
fn numeric_double_literal(
input: ParseInput<Rule>,
) -> ParseResult<core::Double> {
@@ -481,15 +466,6 @@ impl Parsers {
}
}
- fn double_literal(input: ParseInput<Rule>) -> ParseResult<core::Double> {
- Ok(parse_children!(input;
- [numeric_double_literal(n)] => n,
- [minus_infinity_literal(_)] => std::f64::NEG_INFINITY.into(),
- [plus_infinity_literal(_)] => std::f64::INFINITY.into(),
- [NaN(_)] => std::f64::NAN.into(),
- ))
- }
-
fn natural_literal(input: ParseInput<Rule>) -> ParseResult<core::Natural> {
input
.as_str()
@@ -506,13 +482,13 @@ impl Parsers {
.map_err(|e| input.error(format!("{}", e)))
}
+ #[alias(expression)]
fn identifier<E: Clone>(input: ParseInput<Rule>) -> ParseResult<Expr<E>> {
- let span = input.as_span();
Ok(parse_children!(input;
[variable(v)] => {
- spanned(span, Var(v))
+ spanned(input.as_span(), Var(v))
},
- [builtin(e)] => e,
+ [expression(e)] => e,
))
}
@@ -527,42 +503,40 @@ impl Parsers {
))
}
+ #[alias(path_component)]
fn unquoted_path_component<'a>(
input: ParseInput<'a, Rule>,
- ) -> ParseResult<&'a str> {
- Ok(input.as_str())
+ ) -> ParseResult<String> {
+ Ok(input.as_str().to_string())
}
+ #[alias(path_component)]
fn quoted_path_component<'a>(
input: ParseInput<'a, Rule>,
- ) -> ParseResult<&'a str> {
- Ok(input.as_str())
- }
- fn path_component(input: ParseInput<Rule>) -> ParseResult<String> {
- Ok(parse_children!(input;
- [unquoted_path_component(s)] => s.to_string(),
- [quoted_path_component(s)] => {
- const RESERVED: &percent_encoding::AsciiSet =
- &percent_encoding::CONTROLS
- .add(b'=').add(b':').add(b'/').add(b'?')
- .add(b'#').add(b'[').add(b']').add(b'@')
- .add(b'!').add(b'$').add(b'&').add(b'\'')
- .add(b'(').add(b')').add(b'*').add(b'+')
- .add(b',').add(b';');
- s.chars()
- .map(|c| {
- // Percent-encode ascii chars
- if c.is_ascii() {
- percent_encoding::utf8_percent_encode(
- &c.to_string(),
- RESERVED,
- ).to_string()
- } else {
- c.to_string()
- }
- })
- .collect()
- },
- ))
+ ) -> ParseResult<String> {
+ #[rustfmt::skip]
+ const RESERVED: &percent_encoding::AsciiSet =
+ &percent_encoding::CONTROLS
+ .add(b'=').add(b':').add(b'/').add(b'?')
+ .add(b'#').add(b'[').add(b']').add(b'@')
+ .add(b'!').add(b'$').add(b'&').add(b'\'')
+ .add(b'(').add(b')').add(b'*').add(b'+')
+ .add(b',').add(b';');
+ Ok(input
+ .as_str()
+ .chars()
+ .map(|c| {
+ // Percent-encode ascii chars
+ if c.is_ascii() {
+ percent_encoding::utf8_percent_encode(
+ &c.to_string(),
+ RESERVED,
+ )
+ .to_string()
+ } else {
+ c.to_string()
+ }
+ })
+ .collect())
}
fn path(input: ParseInput<Rule>) -> ParseResult<Vec<String>> {
Ok(parse_children!(input;
@@ -572,17 +546,16 @@ impl Parsers {
))
}
- fn local(
+ #[alias(import_type)]
+ fn local<E: Clone>(
input: ParseInput<Rule>,
- ) -> ParseResult<(FilePrefix, Vec<String>)> {
+ ) -> ParseResult<ImportLocation<Expr<E>>> {
Ok(parse_children!(input;
- [parent_path(l)] => l,
- [here_path(l)] => l,
- [home_path(l)] => l,
- [absolute_path(l)] => l,
+ [local_path((prefix, p))] => ImportLocation::Local(prefix, p),
))
}
+ #[alias(local_path)]
fn parent_path(
input: ParseInput<Rule>,
) -> ParseResult<(FilePrefix, Vec<String>)> {
@@ -590,6 +563,7 @@ impl Parsers {
[path(p)] => (FilePrefix::Parent, p)
))
}
+ #[alias(local_path)]
fn here_path(
input: ParseInput<Rule>,
) -> ParseResult<(FilePrefix, Vec<String>)> {
@@ -597,6 +571,7 @@ impl Parsers {
[path(p)] => (FilePrefix::Here, p)
))
}
+ #[alias(local_path)]
fn home_path(
input: ParseInput<Rule>,
) -> ParseResult<(FilePrefix, Vec<String>)> {
@@ -604,6 +579,7 @@ impl Parsers {
[path(p)] => (FilePrefix::Home, p)
))
}
+ #[alias(local_path)]
fn absolute_path(
input: ParseInput<Rule>,
) -> ParseResult<(FilePrefix, Vec<String>)> {
@@ -649,25 +625,31 @@ impl Parsers {
Ok(input.as_str().to_owned())
}
- fn http<E: Clone>(input: ParseInput<Rule>) -> ParseResult<URL<Expr<E>>> {
- Ok(parse_children!(input;
- [http_raw(url)] => url,
- [http_raw(url), import_expression(e)] =>
- URL { headers: Some(e), ..url },
- ))
+ #[alias(import_type)]
+ fn http<E: Clone>(
+ input: ParseInput<Rule>,
+ ) -> ParseResult<ImportLocation<Expr<E>>> {
+ Ok(ImportLocation::Remote(parse_children!(input;
+ [http_raw(url)] => url,
+ [http_raw(url), expression(e)] => URL { headers: Some(e), ..url },
+ )))
}
- fn env(input: ParseInput<Rule>) -> ParseResult<String> {
+ #[alias(import_type)]
+ fn env<E: Clone>(
+ input: ParseInput<Rule>,
+ ) -> ParseResult<ImportLocation<Expr<E>>> {
Ok(parse_children!(input;
- [bash_environment_variable(s)] => s,
- [posix_environment_variable(s)] => s,
+ [environment_variable(v)] => ImportLocation::Env(v),
))
}
+ #[alias(environment_variable)]
fn bash_environment_variable(
input: ParseInput<Rule>,
) -> ParseResult<String> {
Ok(input.as_str().to_owned())
}
+ #[alias(environment_variable)]
fn posix_environment_variable(
input: ParseInput<Rule>,
) -> ParseResult<String> {
@@ -694,27 +676,11 @@ impl Parsers {
})
}
- fn missing(_: ParseInput<Rule>) -> ParseResult<()> {
- Ok(())
- }
-
- fn import_type<E: Clone>(
- input: ParseInput<Rule>,
+ #[alias(import_type)]
+ fn missing<E: Clone>(
+ _input: ParseInput<Rule>,
) -> ParseResult<ImportLocation<Expr<E>>> {
- Ok(parse_children!(input;
- [missing(_)] => {
- ImportLocation::Missing
- },
- [env(e)] => {
- ImportLocation::Env(e)
- },
- [http(url)] => {
- ImportLocation::Remote(url)
- },
- [local((prefix, p))] => {
- ImportLocation::Local(prefix, p)
- },
- ))
+ Ok(ImportLocation::Missing)
}
fn hash(input: ParseInput<Rule>) -> ParseResult<Hash> {
@@ -730,78 +696,65 @@ impl Parsers {
fn import_hashed<E: Clone>(
input: ParseInput<Rule>,
) -> ParseResult<crate::Import<Expr<E>>> {
+ use crate::Import;
+ let mode = ImportMode::Code;
Ok(parse_children!(input;
- [import_type(location)] =>
- crate::Import {mode: ImportMode::Code, location, hash: None },
- [import_type(location), hash(h)] =>
- crate::Import {mode: ImportMode::Code, location, hash: Some(h) },
+ [import_type(location)] => Import { mode, location, hash: None },
+ [import_type(location), hash(h)] => Import { mode, location, hash: Some(h) },
))
}
- fn Text(_: ParseInput<Rule>) -> ParseResult<()> {
- Ok(())
+ #[alias(import_mode)]
+ fn Text(_input: ParseInput<Rule>) -> ParseResult<ImportMode> {
+ Ok(ImportMode::RawText)
}
- fn Location(_: ParseInput<Rule>) -> ParseResult<()> {
- Ok(())
+ #[alias(import_mode)]
+ fn Location(_input: ParseInput<Rule>) -> ParseResult<ImportMode> {
+ Ok(ImportMode::Location)
}
+ #[alias(expression)]
fn import<E: Clone>(input: ParseInput<Rule>) -> ParseResult<Expr<E>> {
- let span = input.as_span();
- Ok(parse_children!(input;
+ use crate::Import;
+ let import = parse_children!(input;
[import_hashed(imp)] => {
- spanned(span, Import(crate::Import {
- mode: ImportMode::Code,
- ..imp
- }))
- },
- [import_hashed(imp), Text(_)] => {
- spanned(span, Import(crate::Import {
- mode: ImportMode::RawText,
- ..imp
- }))
+ Import { mode: ImportMode::Code, ..imp }
},
- [import_hashed(imp), Location(_)] => {
- spanned(span, Import(crate::Import {
- mode: ImportMode::Location,
- ..imp
- }))
+ [import_hashed(imp), import_mode(mode)] => {
+ Import { mode, ..imp }
},
- ))
+ );
+ Ok(spanned(input.as_span(), Import(import)))
}
- fn lambda(_: ParseInput<Rule>) -> ParseResult<()> {
+ fn lambda(_input: ParseInput<Rule>) -> ParseResult<()> {
Ok(())
}
- fn forall(_: ParseInput<Rule>) -> ParseResult<()> {
+ fn forall(_input: ParseInput<Rule>) -> ParseResult<()> {
Ok(())
}
- fn arrow(_: ParseInput<Rule>) -> ParseResult<()> {
+ fn arrow(_input: ParseInput<Rule>) -> ParseResult<()> {
Ok(())
}
- fn merge(_: ParseInput<Rule>) -> ParseResult<()> {
+ fn merge(_input: ParseInput<Rule>) -> ParseResult<()> {
Ok(())
}
- fn assert(_: ParseInput<Rule>) -> ParseResult<()> {
+ fn assert(_input: ParseInput<Rule>) -> ParseResult<()> {
Ok(())
}
- fn if_(_: ParseInput<Rule>) -> ParseResult<()> {
+ fn if_(_input: ParseInput<Rule>) -> ParseResult<()> {
Ok(())
}
- fn in_(_: ParseInput<Rule>) -> ParseResult<()> {
- Ok(())
- }
- fn toMap(_: ParseInput<Rule>) -> ParseResult<()> {
+ fn toMap(_input: ParseInput<Rule>) -> ParseResult<()> {
Ok(())
}
+ #[alias(expression)]
fn empty_list_literal<E: Clone>(
input: ParseInput<Rule>,
) -> ParseResult<Expr<E>> {
- let span = input.as_span();
Ok(parse_children!(input;
- [application_expression(e)] => {
- spanned(span, EmptyListLit(e))
- },
+ [expression(e)] => spanned(input.as_span(), EmptyListLit(e)),
))
}
@@ -816,7 +769,7 @@ impl Parsers {
expression(right)] => {
spanned(span, BoolIf(cond, left, right))
},
- [let_binding(bindings).., in_(()), expression(final_expr)] => {
+ [let_binding(bindings).., expression(final_expr)] => {
bindings.rev().fold(
final_expr,
|acc, x| unspanned(Let(x.0, x.1, x.2, acc))
@@ -826,24 +779,22 @@ impl Parsers {
arrow(()), expression(body)] => {
spanned(span, Pi(l, typ, body))
},
- [operator_expression(typ), arrow(()), expression(body)] => {
+ [expression(typ), arrow(()), expression(body)] => {
spanned(span, Pi("_".into(), typ, body))
},
- [merge(()), import_expression(x), import_expression(y),
- application_expression(z)] => {
+ [merge(()), expression(x), expression(y), expression(z)] => {
spanned(span, Merge(x, y, Some(z)))
},
- [empty_list_literal(e)] => e,
[assert(()), expression(x)] => {
spanned(span, Assert(x))
},
- [toMap(()), import_expression(x), application_expression(y)] => {
+ [toMap(()), expression(x), expression(y)] => {
spanned(span, ToMap(x, Some(y)))
},
- [operator_expression(e)] => e,
- [operator_expression(e), expression(annot)] => {
+ [expression(e), expression(annot)] => {
spanned(span, Annot(e, annot))
},
+ [expression(e)] => e,
))
}
@@ -858,14 +809,8 @@ impl Parsers {
))
}
- fn List(_: ParseInput<Rule>) -> ParseResult<()> {
- Ok(())
- }
- fn Optional(_: ParseInput<Rule>) -> ParseResult<()> {
- Ok(())
- }
-
- #[prec_climb(application_expression, PRECCLIMBER)]
+ #[alias(expression)]
+ #[prec_climb(expression, PRECCLIMBER)]
fn operator_expression<E: Clone>(
input: ParseInput<Rule>,
l: Expr<E>,
@@ -894,55 +839,48 @@ impl Parsers {
Ok(unspanned(BinOp(op, l, r)))
}
- fn Some_(_: ParseInput<Rule>) -> ParseResult<()> {
+ fn Some_(_input: ParseInput<Rule>) -> ParseResult<()> {
Ok(())
}
+ #[alias(expression)]
fn application_expression<E: Clone>(
input: ParseInput<Rule>,
) -> ParseResult<Expr<E>> {
Ok(parse_children!(input;
- [first_application_expression(e)] => e,
- [first_application_expression(first),
- import_expression(rest)..] => {
+ [expression(e)] => e,
+ [expression(first), expression(rest)..] => {
rest.fold(first, |acc, e| unspanned(App(acc, e)))
},
))
}
+ #[alias(expression)]
fn first_application_expression<E: Clone>(
input: ParseInput<Rule>,
) -> ParseResult<Expr<E>> {
let span = input.as_span();
Ok(parse_children!(input;
- [Some_(()), import_expression(e)] => {
+ [Some_(()), expression(e)] => {
spanned(span, SomeLit(e))
},
- [merge(()), import_expression(x), import_expression(y)] => {
+ [merge(()), expression(x), expression(y)] => {
spanned(span, Merge(x, y, None))
},
- [toMap(()), import_expression(x)] => {
+ [toMap(()), expression(x)] => {
spanned(span, ToMap(x, None))
},
- [import_expression(e)] => e,
- ))
- }
-
- fn import_expression<E: Clone>(
- input: ParseInput<Rule>,
- ) -> ParseResult<Expr<E>> {
- Ok(parse_children!(input;
- [selector_expression(e)] => e,
- [import(e)] => e,
+ [expression(e)] => e,
))
}
+ #[alias(expression)]
fn selector_expression<E: Clone>(
input: ParseInput<Rule>,
) -> ParseResult<Expr<E>> {
Ok(parse_children!(input;
- [primitive_expression(e)] => e,
- [primitive_expression(first), selector(rest)..] => {
+ [expression(e)] => e,
+ [expression(first), selector(rest)..] => {
rest.fold(first, |acc, e| unspanned(match e {
Either::Left(l) => Field(acc, l),
Either::Right(ls) => Projection(acc, ls),
@@ -967,6 +905,7 @@ impl Parsers {
))
}
+ #[alias(expression)]
fn primitive_expression<E: Clone>(
input: ParseInput<Rule>,
) -> ParseResult<Expr<E>> {
@@ -977,46 +916,41 @@ impl Parsers {
[integer_literal(n)] => spanned(span, IntegerLit(n)),
[double_quote_literal(s)] => spanned(span, TextLit(s)),
[single_quote_literal(s)] => spanned(span, TextLit(s)),
- [empty_record_type(e)] => e,
- [empty_record_literal(e)] => e,
- [non_empty_record_type_or_literal(e)] => e,
- [union_type(e)] => e,
- [non_empty_list_literal(e)] => e,
- [identifier(e)] => e,
[expression(e)] => e,
))
}
+ #[alias(expression)]
fn empty_record_literal<E: Clone>(
input: ParseInput<Rule>,
) -> ParseResult<Expr<E>> {
- let span = input.as_span();
- Ok(spanned(span, RecordLit(Default::default())))
+ Ok(spanned(input.as_span(), RecordLit(Default::default())))
}
+ #[alias(expression)]
fn empty_record_type<E: Clone>(
input: ParseInput<Rule>,
) -> ParseResult<Expr<E>> {
- let span = input.as_span();
- Ok(spanned(span, RecordType(Default::default())))
+ Ok(spanned(input.as_span(), RecordType(Default::default())))
}
+ #[alias(expression)]
fn non_empty_record_type_or_literal<E: Clone>(
input: ParseInput<Rule>,
) -> ParseResult<Expr<E>> {
- let span = input.as_span();
- Ok(parse_children!(input;
+ let e = parse_children!(input;
[label(first_label), non_empty_record_type(rest)] => {
let (first_expr, mut map) = rest;
map.insert(first_label, first_expr);
- spanned(span, RecordType(map))
+ RecordType(map)
},
[label(first_label), non_empty_record_literal(rest)] => {
let (first_expr, mut map) = rest;
map.insert(first_label, first_expr);
- spanned(span, RecordLit(map))
+ RecordLit(map)
},
- ))
+ );
+ Ok(spanned(input.as_span(), e))
}
fn non_empty_record_type<E: Clone>(
@@ -1055,19 +989,16 @@ impl Parsers {
))
}
+ #[alias(expression)]
fn union_type<E: Clone>(input: ParseInput<Rule>) -> ParseResult<Expr<E>> {
- let span = input.as_span();
- Ok(parse_children!(input;
- [empty_union_type(_)] => {
- spanned(span, UnionType(Default::default()))
- },
- [union_type_entry(entries)..] => {
- spanned(span, UnionType(entries.collect()))
- },
- ))
+ let map = parse_children!(input;
+ [empty_union_type(_)] => Default::default(),
+ [union_type_entry(entries)..] => entries.collect(),
+ );
+ Ok(spanned(input.as_span(), UnionType(map)))
}
- fn empty_union_type(_: ParseInput<Rule>) -> ParseResult<()> {
+ fn empty_union_type(_input: ParseInput<Rule>) -> ParseResult<()> {
Ok(())
}
@@ -1080,13 +1011,13 @@ impl Parsers {
))
}
+ #[alias(expression)]
fn non_empty_list_literal<E: Clone>(
input: ParseInput<Rule>,
) -> ParseResult<Expr<E>> {
- let span = input.as_span();
Ok(parse_children!(input;
[expression(items)..] => spanned(
- span,
+ input.as_span(),
NEListLit(items.collect())
)
))