HOCON grammar

grammar.txt

EOL -> '\n' | '\r' | '\r\n'

Whitespace -> ' ' | '\t'

EscapedSequence -> 
  | '\\' [bfnrt\\] 
  | '\u' [0-9a-fA-F]{4}

QuotedStringElement -> 
  | [^\\"] 
  | EscapedSequence

QuotedString -> 
  | '"' QuotedStringElement* '"'
  | '""'

UnquotedString -> [^$"{}\[\]:=,+#`\^?!@#&\\]+

MultilineString -> '"""' .* '"""'

Numerical -> [0-9]+

Number -> 
  | Numerical
  | Numerical '.' Numerical
  | Numerical '.' [Ee] [+-]? Numerical
  | Numerical '.' Numerical [Ee] [+-]? Numerical

DurationUnit ->
  | 'ns' | 'nanosecond' | 'nanoseconds'
  | 'us' | 'microsecond' | 'microseconds'
  | 'ms' | 'millisecond' | 'milliseconds'
  | 's' | 'second' | 'seconds'
  | 'm' | 'minute' | 'minutes'
  | 'h' | 'hour' | 'hours'
  | 'd' | 'day' | 'days'

Duration -> Number DurationUnit

SizeUnit ->
  | 'B' | 'b' | 'byte' | 'bytes'
  | ‘kB' | 'kilobyte' | 'kilobytes'
  | ‘MB' | 'megabyte' | 'megabytes'
  | ‘GB' | 'gigabyte' | 'gigabytes'
  | ‘TB' | 'terabyte' | 'terabytes'
  | ‘PB' | 'petabyte' | 'petabytes'
  | ‘EB' | 'exabyte' | 'exabytes'
  | ‘ZB' | 'zettabyte' | 'zettabytes'
  | ‘YB' | 'yottabyte' | 'yottabytes'
  | ‘K' | 'k' | 'Ki' | 'KiB' | 'kibibyte' | 'kibibytes'
  | ‘M' | 'm' | 'Mi' | 'MiB' | 'mebibyte' | 'mebibytes'
  | ‘G' | 'g' | 'Gi' | 'GiB' | 'gibibyte' | 'gibibytes'
  | ‘T' | 't' | 'Ti' | 'TiB' | 'tebibyte' | 'tebibytes'
  | ‘P' | 'p' | 'Pi' | 'PiB' | 'pebibyte' | 'pebibytes'
  | ‘E' | 'e' | 'Ei' | 'EiB' | 'exbibyte' | 'exbibytes'
  | ‘Z' | 'z' | 'Zi' | 'ZiB' | 'zebibyte' | 'zebibytes'
  | ‘Y' | 'y' | 'Yi' | 'YiB' | 'yobibyte' | 'yobibytes'

Size -> Number SizeUnit

DeterminedSubstitution -> '${' Key '}'

NonDeterminedSubstitution -> '${?' Key '}'

Substitution ->
  | DeterminedSubstitution
  | NonDeterminedSubstitution

ValueSegment -> 
  | Number
  | Duration
  | Size
  | List
  | Map
  | Substitution
  | UnquotedString
  | QuotedString
  | MultilineString

Value -> ValueSegment ( Whitespace? ValueSegment )*

Separator -> ':' | '='

KeyValuePair -> 
  | Key Whitespace? Separator Whitespace? Value 
  | Key Map

ElementSeparator -> 
  | Whitespace? EOL Whitespace?
  | Whitespace? ',' Whitespace?
  | Whitespace? ',' Whitespace? EOL Whitespace? 

KeyValuePairs ->  
  | KeyValuePair
  | KeyValuePair ElementSeparator
  | KeyValuePair ElementSeparator KeyValuePairs

Map -> '{' WhiteSpace? KeyValuePairs WhiteSpace? '}'

Values ->
  | Value
  | Value ElementSeparator
  | Value ElementSeparator Values

Array -> '[' Whitespace? Values Whitespace? ']'

Document ->
  | Whitespace? EOF
  | Whitespace? KeyValuePairs Whitespace? EOF
  | Whitespace? Map Whitespace? EOF
  | Whitespace? Array Whitespace? EOF

Is this grammar full? Can't find includes here.

This is the grammar of the C subset we used in our class, so you're right, there's no include.

…

________________________________ From: Paul <notifications@github.com> Sent: Thursday, January 16, 2020 4:57:24 PM To: 01010101lzy <01010101lzy@noreply.github.com> Cc: Rynco Maekawa <lynzrand@outlook.com>; Author <author@noreply.github.com> Subject: Re: 01010101lzy/grammar.txt Is this grammar full? Can't find includes here. — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub<https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgist.github.com%2F13fb644218f6c44b6492703a32343abb%3Femail_source%3Dnotifications%26email_token%3DACOIVL2MFAI2AXF7XWIUHUDQ6AOPJA5CNFSM4KHQKHO2YY3PNVWWK3TUL52HS4DFVNDWS43UINXW23LFNZ2KUY3PNVWWK3TUL5UWJTQAF7U4K%23gistcomment-3140037&data=02%7C01%7C%7C20b33c5605ae4e318d2f08d79a621bed%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637147618472755667&sdata=qGZgg1ekFLFIlUiK3BDcgE%2BKYQ9nG3fGEl8v30izltQ%3D&reserved=0>, or unsubscribe<https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Fnotifications%2Funsubscribe-auth%2FACOIVL4AINFB3ABGE5BFZPTQ6AOPJANCNFSM4KHQKHOQ&data=02%7C01%7C%7C20b33c5605ae4e318d2f08d79a621bed%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637147618472765673&sdata=BmOp3h4NU%2BGHyKULRjoYt1qzO0Gn05DO7diWwy%2FDLwk%3D&reserved=0>.

Is there any description of supported/unsopported features?

Excuse me, one more question: what are your definitions of List and Key?

Oh sorry, I thought this was in another repository (that one where I wrote a C0 compiler).

For HOCON, I no longer maintain this grammar definition (and the associating parser) as they are just one of my homeworks. All supported features are the ones listed.

Key is defined as:
Key -> UnquotedString | QuotedString

List is the same as Array, I was inconsistent while writing this.

Well then you possibly will be interested to know that DeterminedSubstitution should use domething like '${' Key ('.' Key)? '}'