6.21 Additional boolean functions

The following bindings are exported by the library (vicare).

Predicates

Function: true? obj

Function: false? obj

Return #t if obj is, respectively, #t or #f; otherwise return #f. It is not an error if obj is not a boolean value.

Function: list-of-booleans? obj

Return #t if obj is null or a proper list of booleans; otherwise return #f.

Comparison

Function: boolean!=? bool0 bool …

The arguments must be booleans. Return #t if the arguments are all different: no two arguments are equal; otherwise return #f. When applied to a single argument: return #f.

Procedure: boolean<? bool0 …

Procedure: boolean>? bool0 …

Procedure: boolean<=? bool0 …

Procedure: boolean>=? bool0 …

Compare the boolean arguments according to the artificial comparison definition:

#t == #t
#f == #f
#f <  #t

Function: boolean-min bool0 bool …

Function: boolean-max bool0 bool …

Return the minimal or maximal boolean among the arguments.