nomcompile3: Build a set of nomenclature files

# - - -   N o n S p T a i l . _ _ i n i t _ _

    def __init__ ( self, scan ):
        '''Scan the non-species tail.
        '''

The non-species tail has only three parts: the scientific name; a slash; and the English name. Here are two examples:

-f Anatinae/Ducks
t  Tadornini/True Shelducks and Sheldgeese

The regular expression that matches the scientific name is defined in Section 6.23, “HT_NAME_RE”.

        #-- 1 --
        # [ if the line in scan begins with a scientific name
        #   matching HT_NAME_RE ->
        #     scan  :=  scan advanced past the matching part
        #     self.sci  :=  the matching part
        #   else ->
        #     scan  :=  scan advanced no further than end of line
        #     Log()  +:=  error message(s)
        #     raise SyntaxError ]
        m = scan.tabReMatch ( HT_NAME_RE )
        if m is None:
            scan.syntax ( "Expecting a scientific name with the first "
                "letter capitalized, the rest lowercase." )
        else:
            self.sci = m.group()

We'll skip whitespace before and after checking for the separating slash, just to be forgiving. The pattern that matches all that is defined in Section 6.24, “SLASH_RE”.

        #-- 2 --
        # [ if scan starts with zero or more whitespace characters,
        #   then a slash, then zero or more whitespace characters
        #   again ->
        #     scan  :=  scan advanced past all that
        #   else ->
        #     scan  :=  scan advanced no further than end of line
        #     Log()  +:=  error message(s)
        #     raise SyntaxError ]
        m = scan.tabReMatch ( SLASH_RE )
        if m is None:
            scan.syntax ( "Expecting the '/' between the scientific "
                "and English names." )

The English name is the balance of the line. The only check we do is that there must be at least two characters.

        #-- 3 --
        # [ if the line in scan has at least two characters ->
        #     scan  :=  scan advanced to end of line
        #     self.eng  :=  remainder of the line, stripped
        #   else ->
        #     scan  :=  scan advanced no further than end of line
        #     Log()  +:=  error message(s)
        #     raise SyntaxError ]
        self.eng = scan.tab(-1)
        if len(self.eng) < 2:
            scan.syntax ( "Expecting the English name." )