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26.4 String accessors

schar works on any simple string object. However, for efficient string access when a simple string type is known, the following specialized accessors are provided:

For simple-bmp-string there is no explicit accessor, but you can get the optimized access by declaring it as simple-bmp-string, and do the access using cl:schar.

You can also use declarations to optimize the access to simple-base-string and simple-text-string. In the case of simple-base-string, that means using only Common Lisp symbols, so it is fully portable.

LispWorks® User Guide and Reference Manual - 01 Dec 2021 19:30:24