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11.21 srfi.101 - Purely functional random-access pairs and lists

Module: srfi.101

SRFI-101 has become a part of R7RS large. See scheme.rlist - R7RS random-access lists.

Special treatment of cond-expand: The feature conditional cond-expand implicitly makes the checked library loaded if available. That is, you can usually say (cond-expand (srfi-N <code>)) where <code> can assume SRFI-N is already available, without saying (use srfi.N).

However, srfi.101 exports the names that conflicts with standard primitive pair and list operators, and importing it without prefix or renaming would surprise you. To avoid confusion, we don’t automatically use srfi.101 even if it is used as feature conditional.

The recommended way is to use library feature requirements, and use srfi.101 with your desired prefix, e.g. (cond-expand ((library srfi.101) (use srfi.101 :prefix ra:))).


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