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Annotation of coherent/a/usr/man/ALL/enum, revision 1.1.1.1

1.1       root        1: 
                      2: 
                      3: enum                        C Keyword                        enum
                      4: 
                      5: 
                      6: 
                      7: 
                      8: Declare a type and identifiers
                      9: 
                     10: 
                     11: An enum  declaration is a data type  whose syntax resembles those
                     12: of the struct and  union declarations.  It lets you enumerate the
                     13: legal value for a given variable.  For example,
                     14: 
                     15: 
                     16:         enum opinion {yes, maybe, no} GUESS;
                     17: 
                     18: 
                     19: declares type opinion can have  one of three values: yes, no, and
                     20: maybe.   It  also  declares the  variable  GUESS  to  be of  type
                     21: opinion.
                     22: 
                     23: As with  a struct or union declaration, the  tag (ooppiinniioonn in this
                     24: example) is  optional; if present,  it may be  used in subsequent
                     25: declarations.  For example, the statement
                     26: 
                     27: 
                     28:         register enum opinion *op;
                     29: 
                     30: 
                     31: declares a register pointer to an object of type opinion.
                     32: 
                     33: All enumerated identifiers  must be distinct from all other iden-
                     34: tifiers in the program.   The identifiers act as constants and be
                     35: used wherever constants are appropriate.
                     36: 
                     37: COHERENT assigns  values to the  identifiers from left  to right,
                     38: normally beginning with zero and increasing by one.  In the above
                     39: example, the values of  yes, no, and maybe are set, respectively,
                     40: to one,  two, and three.  The values often  are iinntts, although if
                     41: the range of values is small enough, the enum will be an unsigned
                     42: char.   If an  identifier in  the declaration  is followed  by an
                     43: equal sign  and a constant, the identifier  is assigned the given
                     44: value, and subsequent values increase by one from that value; for
                     45: example,
                     46: 
                     47: 
                     48:         enum opinion {yes=50, no, maybe} guess;
                     49: 
                     50: 
                     51: sets the values of the identifiers  yes, no, and maybe to 50, 51,
                     52: and 52, respectively.
                     53: 
                     54: ***** See Also *****
                     55: 
                     56: C keywords
                     57: 
                     58: 
                     59: 
                     60: 
                     61: 
                     62: 
                     63: 
                     64: COHERENT Lexicon                                           Page 1
                     65: 
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