| Name : perl-YAML-Logic
| |
| Version : 0.07
| Vendor : obs://build_opensuse_org/devel:languages:perl
|
| Release : lp154.1.1
| Date : 2023-01-27 16:40:35
|
| Group : Development/Libraries/Perl
| Source RPM : perl-YAML-Logic-0.07-lp154.1.1.src.rpm
|
| Size : 0.03 MB
| |
| Packager : https://www_suse_com/
| |
| Summary : Simple boolean logic in YAML
|
Description :
YAML::Logic allows users to define simple boolean logic in a configuration
file, without permitting them to run arbitrary code.
While Perl code can be controlled with the \'Safe\' module, \'Safe\' can\'t
prevent the user from defining infinite loops, exhausting all available
memory or crashing the interpreter by exploiting well-known perl bugs.
YAML::Logic isn\'t perfect in this regard either, but it makes it reasonably
hard to define harmful code.
The syntax for the boolean logic within a YAML file was inspired by John
Siracusa\'s \'Rose::DB::Object::QueryBuilder\' module, which provides data
structures to define logic that is then transformed into SQL. YAML::Logic
takes the data structure instead and transforms it into Perl code.
For example, the data structure to check whether a variable \'$var\' is equal
to a value \"foo\", looks like this:
[$var, \"foo\"]
It\'s a reference to an array containing both the value of the variable and
the value to compare it with. In YAML, this looks like
rule:
- $var
- foo
and this is exactly the syntax that YAML::Logic accepts. Note that after
parsing the YAML configuration above, you need to pass _only_ the array ref
inside the \'rule\' entry to YAML::Logic\'s \'evaluate()\' method:
$logic->evaluate( $yaml_data->{rule}, ...
Passing the entire YAML data would cause an error with YAML::Logic, as it
expects to receive an array ref.
|
RPM found in directory: /packages/linux-pbone/ftp5.gwdg.de/pub/opensuse/repositories/devel:/languages:/perl:/CPAN-Y/15.4/noarch |
