6.5 Predefined Presentation Types
6.5.8 Compound Presentation Types
The following compound presentation types are provided because they implement some common idioms. token-or-type [Presentation Type Abbreviation]
- Arguments:
- tokens type
- Summary:
- A compound type that is used to select one of a set of special tokens, or an object of type type. tokens is anything that can be used as the sequence parameter to member-alist; typically it is a list of symbols.
null-or-type [Presentation Type Abbreviation]
- Arguments:
- type
- Summary:
- A compound type that is used to select nil, whose printed representation is the special token "None," or an object of type type.
type-or-string [Presentation Type Abbreviation]
- Arguments:
- type
- Summary:
- A compound type that is used to select an object of type type or an arbitrary string, for example:
(clim:type-or-string integer). Any input that accept cannot parse as the representation of an object of type type is returned as a string.
CLIM 2.0 User's Guide - OCT 1998 Generated with Harlequin WebMaker