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author | Bryan Jen <bryan.jen@gmail.com> | 2015-09-14 10:49:50 -0700 |
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committer | Bryan Jen <bryan.jen@gmail.com> | 2015-09-14 10:49:50 -0700 |
commit | 0ea0e402283e6f0992d3ba74343728053bbbe785 (patch) | |
tree | 2d71c4db9aedcf5815ee1642aea85c37de5e3868 /lib/puppet/functions | |
parent | c0df8192ee5c2f606ae99c2a3115002962901dea (diff) | |
parent | 00c881d0dabe77fd2401beb0d39c7386b50bb791 (diff) | |
download | puppet-stdlib-0ea0e402283e6f0992d3ba74343728053bbbe785.tar.gz puppet-stdlib-0ea0e402283e6f0992d3ba74343728053bbbe785.tar.bz2 |
Merge pull request #523 from DavidS/modules-2516-is_a
(MODULES-2561) add is_a function
Diffstat (limited to 'lib/puppet/functions')
-rw-r--r-- | lib/puppet/functions/is_a.rb | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/lib/puppet/functions/is_a.rb b/lib/puppet/functions/is_a.rb new file mode 100644 index 0000000..da98b03 --- /dev/null +++ b/lib/puppet/functions/is_a.rb @@ -0,0 +1,32 @@ +# Boolean check to determine whether a variable is of a given data type. This is equivalent to the `=~` type checks. +# +# @example how to check a data type +# # check a data type +# foo = 3 +# $bar = [1,2,3] +# $baz = 'A string!' +# +# if $foo.is_a(Integer) { +# notify { 'foo!': } +# } +# if $bar.is_a(Array) { +# notify { 'bar!': } +# } +# if $baz.is_a(String) { +# notify { 'baz!': } +# } +# +# See the documentation for "The Puppet Type System" for more information about types. +# See the `assert_type()` function for flexible ways to assert the type of a value. +# +Puppet::Functions.create_function(:is_a) do + dispatch :is_a do + param 'Any', :value + param 'Type', :type + end + + def is_a(value, type) + # See puppet's lib/puppet/pops/evaluator/evaluator_impl.rb eval_MatchExpression + Puppet::Pops::Types::TypeCalculator.instance?(type, value) + end +end |