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| Allegro CL version 10.1 Unrevised from 10.0 to 10.1. 10.0 version

## block-information

Arguments: name &optional env

This function returns information about the block named by name in the environment env. env may an environment object or `nil`, indicating the null lexical environment.

Three values are returned: `:block`, a locative, and declaration list. The car of the locative is a catch tag (usually a unique cons cell) and the cdr of the locative is `nil` as long as the block is within scope. As part of the cleanup when the block is exiting, the cdr of the block's locative is set to `'invalid`, which marks the block as being no longer in scope.

See environments.htm for more information on environments.

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This page was not revised from the 10.0 page.
Created 2019.8.20.

|  | ToC | DocOverview | CGDoc | RelNotes | FAQ | Index | PermutedIndex
| Allegro CL version 10.1 Unrevised from 10.0 to 10.1. 10.0 version