mirror of
https://github.com/lcn2/calc.git
synced 2025-08-16 01:03:29 +03:00
42 lines
708 B
Plaintext
42 lines
708 B
Plaintext
NAME
|
|
isptr - whether a value is a pointer
|
|
|
|
SYNOPSIS
|
|
isptr(x)
|
|
|
|
TYPES
|
|
x any
|
|
|
|
return 0, 1, 2, 3, or 4
|
|
|
|
DESCRIPTION
|
|
isptr(x) returns:
|
|
|
|
0 if x is a not pointer
|
|
1 if x is an octet-pointer
|
|
2 if x is a value-pointer
|
|
3 if x is a string-pointer
|
|
4 if x is a number-pointer
|
|
|
|
Pointers are initially defined by using the addreess (&) operator
|
|
with an "addressable" value; currently, these are octets, lvalues,
|
|
strings and real numbers.
|
|
|
|
EXAMPLE
|
|
> a = "abc", b = 3, B = blk()
|
|
> p1 = &B[1]
|
|
> p2 = &a
|
|
> p3 = &*a
|
|
> p4 = &*b
|
|
> print isptr(a), isptr(p1), isptr(p2), isptr(p3), isptr(p4)
|
|
0 1 2 3 4
|
|
|
|
LIMITS
|
|
none
|
|
|
|
LIBRARY
|
|
none
|
|
|
|
SEE ALSO
|
|
isnum, isstr, isblk, isoctet
|