Runtime evaluation: Difference between revisions
Content added Content deleted
m (Made result explicit) |
(GP) |
||
| Line 630: | Line 630: | ||
By restricting the environment it is possible to restrict what kind of programs can be run. |
By restricting the environment it is possible to restrict what kind of programs can be run. |
||
=={{header|PARI/GP}}== |
|||
Since GP is usually run from the [[wp:Read–eval–print loop|REPL]] gp, it is trivial to evaluate programs at runtime (most are run this way). Slightly less trivial is passing code around as a first-class object: |
|||
<lang parigp>runme(f)={ |
|||
f() |
|||
}; |
|||
runme( ()->print("Hello world!") )</lang> |
|||
One facility designed for restricting such embedded programs is <code>default(secure,1)</code> which denies scripts the ability to run <code>system</code> and <code>extern</code>. This cannot be turned off except interactively. |
|||
=={{header|Perl}}== |
=={{header|Perl}}== |
||