18 lines
702 B
BNF
18 lines
702 B
BNF
range-set ::= range ( logical-or range ) *
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logical-or ::= ( ' ' ) * '||' ( ' ' ) *
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range ::= hyphen | simple ( ' ' simple ) * | ''
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hyphen ::= partial ' - ' partial
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simple ::= primitive | partial | tilde | caret
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primitive ::= ( '<' | '>' | '>=' | '<=' | '=' ) partial
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partial ::= xr ( '.' xr ( '.' xr qualifier ? )? )?
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xr ::= 'x' | 'X' | '*' | nr
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nr ::= '0' | [1-9] ( [0-9] ) *
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tilde ::= '~' partial
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caret ::= '^' partial
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qualifier ::= ( '-' pre )? ( '+' build )?
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pre ::= prepart ( '.' prepart ) *
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prepart ::= nr | alphanumid
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build ::= buildid ( '.' buildid ) *
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alphanumid ::= ( [0-9] ) * [A-Za-z-] [-0-9A-Za-z] *
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buildid ::= [-0-9A-Za-z]+
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