Fixes from @kevinmehall. * Prefer character sets over backtracking in the EDN parser. * Avoid duplicate effort when parsing floats in the EDN parser. * Clean up duplicate position tracking code. This turns out to have little performance impact, but makes the grammar much cleaner. * Fix EDN work to pass tests with correct numeric precedence.
This commit is contained in:
Richard Newman
GitHub
parent
30bf827d16
commit
9b23cf3945
3 changed files with 80 additions and 182 deletions
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@ -34,105 +34,40 @@ use types::{SpannedValue, Span, ValueAndSpan};
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// TODO: Support tagged elements
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// TODO: Support discard
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pub nil -> ValueAndSpan =
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start:#position "nil" end:#position {
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ValueAndSpan {
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inner: SpannedValue::Nil,
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span: Span::new(start, end)
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}
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}
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pub nil -> SpannedValue = "nil" { SpannedValue::Nil }
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pub nan -> SpannedValue = "#f" whitespace+ "NaN" { SpannedValue::Float(OrderedFloat(NAN)) }
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pub nan -> ValueAndSpan =
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start:#position "#f" whitespace+ "NaN" end:#position {
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ValueAndSpan {
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inner: SpannedValue::Float(OrderedFloat(NAN)),
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span: Span::new(start, end)
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}
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}
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pub infinity -> SpannedValue = "#f" whitespace+ s:$(sign) "Infinity"
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{ SpannedValue::Float(OrderedFloat(if s == "+" { INFINITY } else { NEG_INFINITY })) }
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pub infinity -> ValueAndSpan =
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start:#position "#f" whitespace+ s:$(sign) "Infinity" end:#position {
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ValueAndSpan {
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inner: SpannedValue::Float(OrderedFloat(if s == "+" { INFINITY } else { NEG_INFINITY })),
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span: Span::new(start, end)
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}
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}
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pub boolean -> ValueAndSpan =
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start:#position "true" end:#position {
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ValueAndSpan {
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inner: SpannedValue::Boolean(true),
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span: Span::new(start, end)
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}
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} /
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start:#position "false" end:#position {
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ValueAndSpan {
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inner: SpannedValue::Boolean(false),
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span: Span::new(start, end)
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}
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}
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pub boolean -> SpannedValue
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= "true" { SpannedValue::Boolean(true) }
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/ "false" { SpannedValue::Boolean(false) }
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digit = [0-9]
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alphanumeric = [0-9a-zA-Z]
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octaldigit = [0-7]
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validbase = [3][0-6] / [12][0-9] / [2-9]
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hex = [0-9a-fA-F]
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sign = "-" / "+"
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sign = [+-]
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pub bigint -> ValueAndSpan =
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start:#position b:$( sign? digit+ ) "N" end:#position {
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ValueAndSpan {
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inner: SpannedValue::BigInteger(b.parse::<BigInt>().unwrap()),
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span: Span::new(start, end)
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}
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}
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pub bigint -> SpannedValue = b:$( sign? digit+ ) "N"
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{ SpannedValue::BigInteger(b.parse::<BigInt>().unwrap()) }
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pub octalinteger -> SpannedValue = "0" i:$( octaldigit+ )
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{ SpannedValue::Integer(i64::from_str_radix(i, 8).unwrap()) }
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pub hexinteger -> SpannedValue = "0x" i:$( hex+ )
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{ SpannedValue::Integer(i64::from_str_radix(i, 16).unwrap()) }
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pub octalinteger -> ValueAndSpan =
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start:#position "0" i:$( octaldigit+ ) end:#position {
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ValueAndSpan {
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inner: SpannedValue::Integer(i64::from_str_radix(i, 8).unwrap()),
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span: Span::new(start, end)
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}
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}
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pub basedinteger -> SpannedValue = b:$( validbase ) "r" i:$( alphanumeric+ )
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{ SpannedValue::Integer(i64::from_str_radix(i, b.parse::<u32>().unwrap()).unwrap()) }
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pub hexinteger -> ValueAndSpan =
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start:#position "0x" i:$( hex+ ) end:#position {
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ValueAndSpan {
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inner: SpannedValue::Integer(i64::from_str_radix(i, 16).unwrap()),
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span: Span::new(start, end)
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}
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}
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pub integer -> SpannedValue = i:$( sign? digit+ ) !("." / ([eE]))
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{ SpannedValue::Integer(i.parse::<i64>().unwrap()) }
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pub basedinteger -> ValueAndSpan =
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// Only allow values 2-36
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start:#position b:$( validbase ) "r" i:$( alphanumeric+ ) end:#position {
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ValueAndSpan {
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inner: SpannedValue::Integer(i64::from_str_radix(i, b.parse::<u32>().unwrap()).unwrap()),
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span: Span::new(start, end)
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}
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}
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pub float -> SpannedValue = f:$(sign? digit+ ("." digit+)? ([eE] sign? digit+)?)
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{ SpannedValue::Float(OrderedFloat(f.parse::<f64>().unwrap())) }
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pub integer -> ValueAndSpan =
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start:#position i:$( sign? digit+ ) end:#position {
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ValueAndSpan {
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inner: SpannedValue::Integer(i.parse::<i64>().unwrap()),
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span: Span::new(start, end)
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}
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}
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frac = sign? digit+ "." digit+
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exp = sign? digit+ ("e" / "E") sign? digit+
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frac_exp = sign? digit+ "." digit+ ("e" / "E") sign? digit+
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// The order here is important - frac_exp must come before (exp / frac) or the
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// parser assumes exp or frac when the float is really a frac_exp and fails
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pub float -> ValueAndSpan =
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start:#position f:$( frac_exp / exp / frac ) end:#position {
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ValueAndSpan {
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inner: SpannedValue::Float(OrderedFloat(f.parse::<f64>().unwrap())),
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span: Span::new(start, end)
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}
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}
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number -> SpannedValue = ( bigint / basedinteger / hexinteger / octalinteger / integer / float )
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// TODO: \newline, \return, \space and \tab
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special_char = quote / tab
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@ -140,19 +75,13 @@ quote = "\\\""
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tab = "\\tab"
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char = [^"] / special_char
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pub text -> ValueAndSpan =
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start:#position "\"" t:$( char* ) "\"" end:#position {
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ValueAndSpan {
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inner: SpannedValue::Text(t.to_string()),
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span: Span::new(start, end)
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}
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}
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pub text -> SpannedValue = "\"" t:$( char* ) "\""
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{ SpannedValue::Text(t.to_string()) }
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// RFC 3339 timestamps. #inst "1985-04-12T23:20:50.52Z"
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// We accept an arbitrary depth of decimals.
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// Note that we discard the timezone information -- all times are translated to UTC.
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pub inst_string -> DateTime<Utc> =
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inst_string -> DateTime<Utc> =
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"#inst" whitespace+ "\"" d:$( [0-9]*<4> "-" [0-2][0-9] "-" [0-3][0-9]
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"T"
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[0-2][0-9] ":" [0-5][0-9] ":" [0-6][0-9]
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@ -165,7 +94,7 @@ pub inst_string -> DateTime<Utc> =
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.map_err(|_| "invalid datetime") // Oh, rustpeg.
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}
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pub inst_micros -> DateTime<Utc> =
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inst_micros -> DateTime<Utc> =
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"#instmicros" whitespace+ d:$( digit+ ) {
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let micros = d.parse::<i64>().unwrap();
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let seconds: i64 = micros / 1000000;
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@ -173,7 +102,7 @@ pub inst_micros -> DateTime<Utc> =
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Utc.timestamp(seconds, nanos)
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}
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pub inst_millis -> DateTime<Utc> =
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inst_millis -> DateTime<Utc> =
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"#instmillis" whitespace+ d:$( digit+ ) {
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let millis = d.parse::<i64>().unwrap();
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let seconds: i64 = millis / 1000;
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@ -181,26 +110,16 @@ pub inst_millis -> DateTime<Utc> =
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Utc.timestamp(seconds, nanos)
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}
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pub inst -> ValueAndSpan =
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start:#position t:(inst_millis / inst_micros / inst_string) end:#position {
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ValueAndSpan {
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inner: SpannedValue::Instant(t),
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span: Span::new(start, end)
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}
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}
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inst -> SpannedValue = t:(inst_millis / inst_micros / inst_string)
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{ SpannedValue::Instant(t) }
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pub uuid_string -> Uuid =
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uuid_string -> Uuid =
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"\"" u:$( [a-f0-9]*<8> "-" [a-f0-9]*<4> "-" [a-f0-9]*<4> "-" [a-f0-9]*<4> "-" [a-f0-9]*<12> ) "\"" {
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Uuid::parse_str(u).expect("this is a valid UUID string")
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}
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pub uuid -> ValueAndSpan =
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start:#position "#uuid" whitespace+ u:(uuid_string) end:#position {
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ValueAndSpan {
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inner: SpannedValue::Uuid(u),
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span: Span::new(start, end)
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}
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}
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pub uuid -> SpannedValue = "#uuid" whitespace+ u:uuid_string
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{ SpannedValue::Uuid(u) }
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namespace_divider = "."
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namespace_separator = "/"
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@ -208,8 +127,8 @@ namespace_separator = "/"
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// TODO: Be more picky here
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// Keywords follow the rules of symbols, except they can (and must) begin with :
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// e.g. :fred or :my/fred. See https://github.com/edn-format/edn#keywords
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symbol_char_initial = [a-z] / [A-Z] / [0-9] / [*!_?$%&=<>]
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symbol_char_subsequent = [a-z] / [A-Z] / [0-9] / [-*!_?$%&=<>]
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symbol_char_initial = [a-zA-Z0-9*!_?$%&=<>]
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symbol_char_subsequent = [a-zA-Z0-9*!_?$%&=<>-]
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symbol_namespace = symbol_char_initial symbol_char_subsequent* (namespace_divider symbol_char_subsequent+)*
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symbol_name = ( symbol_char_initial+ symbol_char_subsequent* )
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@ -217,76 +136,47 @@ plain_symbol_name = symbol_name / "..." / "."
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keyword_prefix = ":"
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pub symbol -> ValueAndSpan =
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start:#position
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pub symbol -> SpannedValue =
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ns:( sns:$(symbol_namespace) namespace_separator { sns })?
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n:$(plain_symbol_name)
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end:#position {
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ValueAndSpan {
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inner: SpannedValue::from_symbol(ns, n),
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span: Span::new(start, end)
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}
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}
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{ SpannedValue::from_symbol(ns, n) }
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pub keyword -> ValueAndSpan =
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start:#position
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pub keyword -> SpannedValue =
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keyword_prefix
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ns:( sns:$(symbol_namespace) namespace_separator { sns })?
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n:$(symbol_name)
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end:#position {
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ValueAndSpan {
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inner: SpannedValue::from_keyword(ns, n),
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span: Span::new(start, end)
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}
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}
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{ SpannedValue::from_keyword(ns, n) }
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pub list -> ValueAndSpan =
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start:#position "(" __ v:(value)* __ ")" end:#position {
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ValueAndSpan {
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inner: SpannedValue::List(LinkedList::from_iter(v)),
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span: Span::new(start, end)
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}
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}
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pub list -> SpannedValue = "(" __ v:(value)* __ ")"
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{ SpannedValue::List(LinkedList::from_iter(v)) }
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pub vector -> ValueAndSpan =
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start:#position "[" __ v:(value)* __ "]" end:#position {
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ValueAndSpan {
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inner: SpannedValue::Vector(v),
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span: Span::new(start, end)
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}
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}
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pub vector -> SpannedValue = "[" __ v:(value)* __ "]"
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{ SpannedValue::Vector(v) }
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pub set -> ValueAndSpan =
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start:#position "#{" __ v:(value)* __ "}" end:#position {
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ValueAndSpan {
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inner: SpannedValue::Set(BTreeSet::from_iter(v)),
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span: Span::new(start, end)
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}
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}
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pub set -> SpannedValue = "#{" __ v:(value)* __ "}"
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{ SpannedValue::Set(BTreeSet::from_iter(v)) }
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pair -> (ValueAndSpan, ValueAndSpan) =
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k:(value) v:(value) {
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(k, v)
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}
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pub map -> ValueAndSpan =
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start:#position "{" __ v:(pair)* __ "}" end:#position {
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ValueAndSpan {
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inner: SpannedValue::Map(BTreeMap::from_iter(v)),
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span: Span::new(start, end)
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}
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}
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pub map -> SpannedValue = "{" __ v:(pair)* __ "}"
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{ SpannedValue::Map(BTreeMap::from_iter(v)) }
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// It's important that float comes before integer or the parser assumes that
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// floats are integers and fails to parse
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pub value -> ValueAndSpan =
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__ v:(nil / nan / infinity / boolean / float / octalinteger / hexinteger / basedinteger / inst / uuid / bigint / integer / text / keyword / symbol / list / vector / map / set) __ {
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v
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__ start:#position v:(nil / nan / infinity / boolean / number / inst / uuid / text / keyword / symbol / list / vector / map / set) end:#position __ {
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ValueAndSpan {
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inner: v,
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span: Span::new(start, end)
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}
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}
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// Clojure (and thus EDN) regards commas as whitespace, and thus the two-element vectors [1 2] and
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// [1,,,,2] are equivalent, as are the maps {:a 1, :b 2} and {:a 1 :b 2}.
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whitespace = (" " / "\r" / "\n" / "\t" / ",")
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comment = ";" [^\r\n]* ("\r" / "\n")?
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whitespace = [ \r\n\t,]
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comment = ";" [^\r\n]* [\r\n]?
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__ = (whitespace / comment)*
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@ -163,6 +163,12 @@ impl From<SpannedValue> for Value {
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}
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}
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impl From<ValueAndSpan> for Value {
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fn from(src: ValueAndSpan) -> Value {
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src.inner.into()
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}
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}
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/// Creates `from_$TYPE` helper functions for Value and SpannedValue,
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/// like `from_float()` or `from_ordered_float()`.
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macro_rules! def_from {
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@ -617,7 +623,10 @@ mod test {
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#[test]
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fn test_print_edn() {
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assert_eq!("1234N", Value::from_bigint("1234").unwrap().to_string());
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let string = "[ 1 2 ( 3.14 ) #{ 4N } { foo/bar 42 :baz/boz 43 } [ ] :five :six/seven eight nine/ten true false nil #f NaN #f -Infinity #f +Infinity ]";
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let data = Value::Vector(vec![
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Value::Integer(1),
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Value::Integer(2),
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@ -60,7 +60,7 @@ fn s_plain(name: &str) -> Value {
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macro_rules! fn_parse_into_value {
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($name: ident) => {
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fn $name<'a, T>(src: T) -> Result<Value, ParseError> where T: Into<&'a str> {
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parse::$name(src.into()).map(|x| x.inner.into())
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parse::$name(src.into()).map(|x| x.into())
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}
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}
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}
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@ -98,7 +98,7 @@ fn test_nil() {
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#[test]
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fn test_span_nil() {
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assert_eq!(parse::nil("nil").unwrap(), ValueAndSpan {
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assert_eq!(parse::value("nil").unwrap(), ValueAndSpan {
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inner: SpannedValue::Nil,
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span: Span(0, 3)
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});
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@ -120,7 +120,7 @@ fn test_nan() {
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#[test]
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fn test_span_nan() {
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assert_eq!(parse::nan("#f NaN").unwrap(), ValueAndSpan {
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assert_eq!(parse::value("#f NaN").unwrap(), ValueAndSpan {
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inner: SpannedValue::Float(OrderedFloat(f64::NAN)),
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span: Span(0, 6)
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});
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@ -150,11 +150,11 @@ fn test_infinity() {
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#[test]
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fn test_span_infinity() {
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assert_eq!(parse::infinity("#f -Infinity").unwrap(), ValueAndSpan {
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assert_eq!(parse::value("#f -Infinity").unwrap(), ValueAndSpan {
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inner: SpannedValue::Float(OrderedFloat(f64::NEG_INFINITY)),
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span: Span(0, 12)
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});
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assert_eq!(parse::infinity("#f +Infinity").unwrap(), ValueAndSpan {
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assert_eq!(parse::value("#f +Infinity").unwrap(), ValueAndSpan {
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inner: SpannedValue::Float(OrderedFloat(f64::INFINITY)),
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span: Span(0, 12)
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});
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@ -172,12 +172,12 @@ fn test_boolean() {
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#[test]
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fn test_span_boolean() {
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assert_eq!(parse::boolean("true").unwrap(), ValueAndSpan {
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assert_eq!(parse::value("true").unwrap(), ValueAndSpan {
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inner: SpannedValue::Boolean(true),
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span: Span(0, 4)
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});
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assert_eq!(parse::boolean("false").unwrap(), ValueAndSpan {
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assert_eq!(parse::value("false").unwrap(), ValueAndSpan {
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inner: SpannedValue::Boolean(false),
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span: Span(0, 5)
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});
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@ -235,19 +235,19 @@ fn test_octalinteger() {
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#[test]
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fn test_span_integer() {
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assert_eq!(parse::integer("42").unwrap(), ValueAndSpan {
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assert_eq!(parse::value("42").unwrap(), ValueAndSpan {
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inner: SpannedValue::Integer(42),
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span: Span(0, 2)
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});
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assert_eq!(parse::hexinteger("0xabc111").unwrap(), ValueAndSpan {
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assert_eq!(parse::value("0xabc111").unwrap(), ValueAndSpan {
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inner: SpannedValue::Integer(11256081),
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span: Span(0, 8)
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});
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assert_eq!(parse::basedinteger("2r111").unwrap(), ValueAndSpan {
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assert_eq!(parse::value("2r111").unwrap(), ValueAndSpan {
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inner: SpannedValue::Integer(7),
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span: Span(0, 5)
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});
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assert_eq!(parse::octalinteger("011").unwrap(), ValueAndSpan {
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assert_eq!(parse::value("011").unwrap(), ValueAndSpan {
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inner: SpannedValue::Integer(9),
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span: Span(0, 3)
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});
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||||
|
|
@ -266,7 +266,6 @@ fn test_uuid() {
|
|||
.expect("valid UUID");
|
||||
let actual = parse::uuid("#uuid \"550e8400-e29b-41d4-a716-446655440000\"")
|
||||
.expect("parse success")
|
||||
.inner
|
||||
.into();
|
||||
assert_eq!(self::Value::Uuid(expected), actual);
|
||||
}
|
||||
|
|
@ -291,7 +290,7 @@ fn test_span_bigint() {
|
|||
let max_i64 = i64::max_value().to_bigint().unwrap();
|
||||
let bigger = &max_i64 * &max_i64;
|
||||
|
||||
assert_eq!(parse::bigint("85070591730234615847396907784232501249N").unwrap(), ValueAndSpan {
|
||||
assert_eq!(parse::value("85070591730234615847396907784232501249N").unwrap(), ValueAndSpan {
|
||||
inner: SpannedValue::BigInteger(bigger),
|
||||
span: Span(0, 39)
|
||||
});
|
||||
|
|
@ -307,13 +306,13 @@ fn test_float() {
|
|||
assert_eq!(float("77.88e99").unwrap(), Float(OrderedFloat(77.88e99f64)));
|
||||
assert_eq!(float("-9.9E-9").unwrap(), Float(OrderedFloat(-9.9E-9f64)));
|
||||
|
||||
assert!(float("42").is_err());
|
||||
assert_eq!(float("42").unwrap(), Float(OrderedFloat(42f64)));
|
||||
assert!(float("nil").is_err());
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_span_float() {
|
||||
assert_eq!(parse::float("42.0").unwrap(), ValueAndSpan {
|
||||
assert_eq!(parse::value("42.0").unwrap(), ValueAndSpan {
|
||||
inner: SpannedValue::Float(OrderedFloat(42f64)),
|
||||
span: Span(0, 4)
|
||||
});
|
||||
|
|
@ -332,7 +331,7 @@ fn test_text() {
|
|||
|
||||
#[test]
|
||||
fn test_span_text() {
|
||||
assert_eq!(parse::text("\"hello world\"").unwrap(), ValueAndSpan {
|
||||
assert_eq!(parse::value("\"hello world\"").unwrap(), ValueAndSpan {
|
||||
inner: SpannedValue::Text("hello world".to_string()),
|
||||
span: Span(0, 13)
|
||||
});
|
||||
|
|
@ -359,11 +358,11 @@ fn test_symbol() {
|
|||
|
||||
#[test]
|
||||
fn test_span_symbol() {
|
||||
assert_eq!(parse::symbol("hello").unwrap(), ValueAndSpan {
|
||||
assert_eq!(parse::value("hello").unwrap(), ValueAndSpan {
|
||||
inner: SpannedValue::from_symbol(None, "hello"),
|
||||
span: Span(0, 5)
|
||||
});
|
||||
assert_eq!(parse::symbol("hello/world").unwrap(), ValueAndSpan {
|
||||
assert_eq!(parse::value("hello/world").unwrap(), ValueAndSpan {
|
||||
inner: SpannedValue::from_symbol("hello", "world"),
|
||||
span: Span(0, 11)
|
||||
});
|
||||
|
|
@ -389,11 +388,11 @@ fn test_keyword() {
|
|||
|
||||
#[test]
|
||||
fn test_span_keyword() {
|
||||
assert_eq!(parse::keyword(":hello").unwrap(), ValueAndSpan {
|
||||
assert_eq!(parse::value(":hello").unwrap(), ValueAndSpan {
|
||||
inner: SpannedValue::from_keyword(None, "hello"),
|
||||
span: Span(0, 6)
|
||||
});
|
||||
assert_eq!(parse::keyword(":hello/world").unwrap(), ValueAndSpan {
|
||||
assert_eq!(parse::value(":hello/world").unwrap(), ValueAndSpan {
|
||||
inner: SpannedValue::from_keyword("hello", "world"),
|
||||
span: Span(0, 12)
|
||||
});
|
||||
|
|
|
|||
Loading…
Reference in a new issue