zl:1 - FTP

245
funeall
Examples:
(ftruncate 5) => 5.0 and 0
(ftruncate -5) => -5.0 and 0
(ftruncate 5.2) => 5.0 and 0.19999981
(ftruncate -5.2) => -5.0 and -0.19999981
(ftruncate 5 3) => 1.0 and 2
(ftruncate -5 3) => -1.0 and -2
(ftruncate 5.2 4) => 1.0 and 1.1999998
(ftruncate -5.2 4) => -1.0 and -1.1999998
(ftruncate 4.2d0) => 4.0d0 and 0.2B000000000000018d0
(ftruncate -4.2d0) => -4.0d0 and -B.200BBBBBBBBBBBB18dB
For a table of related items: See the section "Functions That Divide and
Return Quotient as Floating-point Number" in Symbolics Common Lisp:
Language Concepts.
funcall fn &rest args Function
(funcall fn al a2 ••• an) applies the function fn to the arguments al, a2, ""
an. fn cannot be a special form nor a macro; this would not be meaningful.
Example:
(cons 1 2) => (1 . 2)
(setq cons 'plus)
(funcall cons 1 2) => 3
(cons 1 2) => (1 . 2)
This shows that the use of the symbol cons as the name of a variable and
the use of that symbol as the name of a function do not interact. The funcall
form evaluates the variable and gets the symbol zl:plus, which is the
name of a different function. The cons form invokes the function named
cons.
Note: The Maclisp functions sub realI, IsubrcalI, and zl:arraycall are not
needed in Symbolics Common Lisp; funcall is just as efficient. zl:arraycall
is provided for compatibility; it ignores its first subform (the Maclisp array
type) and is otherwise identical to aref. subrcall and lsubrcall are not
provided.
See the section "Functions for Function Invocation" in Symbolics Common
Lisp: Language Concepts.
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