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ANSI Common Lisp  22 Printer 22.4 Dictionary of Printer
| 22.4.4 pprint-exit-if-list-exhausted |
Local Macro |
- Syntax:
-
pprint-exit-if-list-exhausted
< no arguments >
 nil
- Description:
-
Tests whether or not the list passed to
the lexically current logical block
has been exhausted; see Section 22.2.1.1 Dynamic Control of the Arrangement of Output.
If this list has been
reduced to nil, pprint-exit-if-list-exhausted terminates the execution
of the lexically current logical block except for the printing
of the suffix. Otherwise pprint-exit-if-list-exhausted returns nil.
Whether or not pprint-exit-if-list-exhausted is fbound in the
global environment is implementation-dependent;
however, the restrictions on redefinition and shadowing of
pprint-exit-if-list-exhausted are the same as for symbols in the common-lisp package
which are fbound in the global environment.
The consequences of attempting to use pprint-exit-if-list-exhausted outside
of pprint-logical-block are undefined.
- Exceptional Situations:
-
An error is signaled (at macro expansion time or at run time) if
pprint-exit-if-list-exhausted is used anywhere other than
lexically within a call on pprint-logical-block.
Also, the consequences of executing pprint-if-list-exhausted outside
of the dynamic extent of the pprint-logical-block which lexically
contains it are undefined.
- See Also:
-
pprint-logical-block, pprint-pop.
- Allegro CL Implementation Details:
-
None.
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