Puppet Function: is_integer

Defined in:
puppet/modules/stdlib/lib/puppet/parser/functions/is_integer.rb
Function type:
Ruby 3.x API

Overview

is_integer() ⇒ Any

Returns true if the variable passed to this function is an Integer or a decimal (base 10) integer in String form. The string may start with a '-' (minus). A value of '0' is allowed, but a leading '0' digit may not be followed by other digits as this indicates that the value is octal (base 8).

If given any other argument `false` is returned.

Returns:

  • (Any) 


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# File 'puppet/modules/stdlib/lib/puppet/parser/functions/is_integer.rb', line 6

newfunction(:is_integer, :type => :rvalue, :doc => <<-EOS
Returns true if the variable passed to this function is an Integer or
a decimal (base 10) integer in String form. The string may
start with a '-' (minus). A value of '0' is allowed, but a leading '0' digit may not
be followed by other digits as this indicates that the value is octal (base 8).

If given any other argument `false` is returned.
  EOS
) do |arguments|

  function_deprecation([:is_integer, 'This method is deprecated, please use the stdlib validate_legacy function, with Stdlib::Compat::Integer. There is further documentation for validate_legacy function in the README.'])

  if (arguments.size != 1) then
    raise(Puppet::ParseError, "is_integer(): Wrong number of arguments "+
      "given #{arguments.size} for 1")
  end

  value = arguments[0]

  # Regex is taken from the lexer of puppet
  # puppet/pops/parser/lexer.rb but modified to match also
  # negative values and disallow numbers prefixed with multiple
  # 0's
  #
  # TODO these parameter should be a constant but I'm not sure
  # if there is no risk to declare it inside of the module
  # Puppet::Parser::Functions

  # Integer numbers like
  # -1234568981273
  # 47291
  numeric = %r{^-?(?:(?:[1-9]\d*)|0)$}

  if value.is_a? Integer or (value.is_a? String and value.match numeric)
    return true
  else
    return false
  end
end