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be surrounded on both sides by whitespace, except at the start and end of the st
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of (a dependency item of any kind followed by whitespace), followed by a close parenthesis. |
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of (a dependency item of any kind followed by whitespace), followed by a close parenthesis. |
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More formally: \t{any-of ::= '||' whitespace '(' whitespace (item whitespace)* ')'}. |
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More formally: \t{any-of ::= '||' whitespace '(' whitespace (item whitespace)* ')'}. |
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Permitted in \t{DEPEND}, \t{RDEPEND}, \t{PDEPEND}, \t{LICENSE}, \t{REQUIRED\_USE}. |
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Permitted in \t{DEPEND}, \t{RDEPEND}, \t{PDEPEND}, \t{LICENSE}, \t{REQUIRED\_USE}. |
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\item An only-one-of group, which consists of the string \t{\textasciicircum\textasciicircum}, |
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\item An exactly-one-of group, which consists of the string \t{\textasciicircum\textasciicircum}, |
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followed by whitespace, followed by an open parenthesis, followed by whitespace, followed by |
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followed by whitespace, followed by an open parenthesis, followed by whitespace, followed by |
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zero or more of (a dependency item of any kind followed by whitespace), followed by a close |
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zero or more of (a dependency item of any kind followed by whitespace), followed by a close |
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parenthesis. More formally: \t{only-one-of ::= '\textasciicircum\textasciicircum' whitespace |
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parenthesis. More formally: \t{exactly-one-of ::= '\textasciicircum\textasciicircum' whitespace |
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'(' whitespace (item whitespace)* ')'}. |
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'(' whitespace (item whitespace)* ')'}. |
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Permitted in \t{REQUIRED\_USE}. |
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Permitted in \t{REQUIRED\_USE}. |
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\item A use-conditional group, which consists of an optional exclamation mark, followed by |
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\item A use-conditional group, which consists of an optional exclamation mark, followed by |
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considered to be matched if its associated package dependency specification is n
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An empty any-of group counts as being matched. |
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An empty any-of group counts as being matched. |
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\subsection{Only-one-of Dependency Specifications} |
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\subsection{Exactly-one-of Dependency Specifications} |
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Any use-conditional group that is an immediate child of an only-one-of group, if not enabled |
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Any use-conditional group that is an immediate child of an exactly-one-of group, if not enabled |
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(disabled for an exclamation mark prefixed use flag name), is not considered a member of the |
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(disabled for an exclamation mark prefixed use flag name), is not considered a member of the |
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only-one-of group for match purposes. |
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exactly-one-of group for match purposes. |
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In an only-one-of group, exactly one immediate child element must be matched. |
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In an exactly-one-of group, exactly one immediate child element must be matched. |
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An empty only-one-of group counts as being matched. |
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An empty exactly-one-of group counts as being matched. |
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\subsection{Package Dependency Specifications} |
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\subsection{Package Dependency Specifications} |
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