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  ANSI Common Lisp   5 Data and Control Flow   5.3 Dictionary of Data and Control Flow

5.3.26 return Macro

return [result]    |

Arguments and Values:
result - a form; evaluated. The default is nil.

Returns, as if by return-from, from the block named nil.

 (block nil (return) 1)   NIL
 (block nil (return 1) 2)  1
 (block nil (return (values 1 2)) 3)  1, 2
 (block nil (block alpha (return 1) 2))  1
 (block alpha (block nil (return 1)) 2)  2
 (block nil (block nil (return 1) 2))  1

See Also:
block, return-from, Section 3.1 Evaluation

 (return) ==(return-from nil)
 (return form) ==(return-from nil form)

The implicit blocks established by macros such as do are often named nil, so that return can be used to exit from such forms.

Allegro CL Implementation Details:

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