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da89ac0b25
Add the possibility of a property query clause to be optional by preceding it with a question mark. Reviewed-by: Richard Levitte <levitte@openssl.org> (Merged from https://github.com/openssl/openssl/pull/8943)
19 lines
602 B
EBNF
19 lines
602 B
EBNF
(* https://bottlecaps.de/rr/ui *)
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Definition
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::= PropertyName ( '=' Value )? ( ',' PropertyName ( '=' Value )? )*
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Query ::= PropertyQuery ( ',' PropertyQuery )*
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PropertyQuery ::= '-'? PropertyName
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| '?' ( PropertyName (( '=' | '!=' ) Value)?)
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Value ::= NumberLiteral
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| StringLiteral
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StringLiteral ::= QuotedString | UnquotedString
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QuotedString ::= '"' [^"]* '"'
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| "'" [^']* "'"
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UnquotedString ::= [^{space},]+
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NumberLiteral
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::= '0' ( [0-7]* | 'x' [0-9A-Fa-f]+ )
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| '-'? [1-9] [0-9]+
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PropertyName
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::= [A-Z] [A-Z0-9_]* ( '.' [A-Z] [A-Z0-9_]* )*
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