3.1.4 Changes to Common Lisp character operations
char-codereturns the non-negative integer that encodes its character argument. It ignores bits and font attributes.
code-char takes an optional bits argument in addition to its code argument followed by an optional font argument.
char-int returns the non-negative integer that encodes its character argument. If the bits and font attributes of a character are 0, the results of
char-code are the same.
The optional font argument to the function
digit-char has been retained as an extension to Common Lisp.
Characters within a particular character set are compared by using their character external code according to the ordering given by Figure 3.1 on page 18.
Character comparison operations treat bits and font attributes as follows:
char>=compare bits and font attributes. If characters agree in their bits and font attributes, they are compared according to their code attributes.
char-not-lesspignore differences in bits and font attributes.
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