Package gnu.expr

Class Keyword

    • Field Detail

      • keywordNamespace

        public static final Namespace keywordNamespace
    • Constructor Detail

      • Keyword

        public Keyword()
      • Keyword

        public Keyword​(Namespace namespace,
                       String name)
        Used for constructing literals (int gnu.expr.LitTable).
    • Method Detail

      • asSymbol

        public Symbol asSymbol()
        Get the corresponding non-keyword symbol. Informally, the symbol corresponding to dropping the ':'.
      • make

        public static Keyword make​(String name)
        Create or find a Keyword with a given name (without ':').
        Parameters:
        name - the print-name of the desired Keyword
        Returns:
        a Keyword with the given name, newly created iff none such exist
      • isKeyword

        public static boolean isKeyword​(Object obj)
        Test whether an object is a keyword.
        Parameters:
        obj - the object to test.
        Returns:
        true if the object is a keyword, false otherwise.
      • searchForKeyword

        public static Object searchForKeyword​(Object[] vals,
                                              int offset,
                                              Object keyword)
        Search vals[0:offset-1] for a keyword. Each key at vals[i] is followed by a value at keys[i+1]. (This is used to search for a keyword parameter in an argument list.)
        Parameters:
        vals - the list to search in
        offset - the index in vals to start the search at
        keyword - the keyword to search for
        Returns:
        vals[i+1] such that vals[i]==keyword (and (i-offset) is even and non-negative); if there is no such i, return Special.dfault.
      • searchForKeyword

        public static Object searchForKeyword​(Object[] vals,
                                              int offset,
                                              Object keyword,
                                              Object dfault)
        Search vals[0:offset-1] for a keyword. Each key at vals[i] is followed by a value at keys[i+1]. (This is used to search for a keyword parameter in an argument list.)
        Parameters:
        vals - the list to search in
        offset - the index in vals to start the search at
        keyword - the keyword to search for
        dfault - the value to return if there is no match
        Returns:
        vals[i+1] such that vals[i]==keyword (and (i-offset) is even and non-negative); if there is no such i, return dfault.