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# Various methods used to coerce values into a canonical form.
#
# @api private
module Puppet::Coercion
# Try to coerce various input values into boolean true/false
#
# Only a very limited subset of values are allowed. This method does not try
# to provide a generic "truthiness" system.
#
# @param value [Boolean, Symbol, String]
# @return [Boolean]
# @raise
# @api private
def self.boolean(value)
# downcase strings
if value.respond_to? :downcase
value = value.downcase
end
case value
when true, :true, 'true', :yes, 'yes'
true
when false, :false, 'false', :no, 'no'
false
else
fail('expected a boolean value')
end
end
# Return the list of acceptable boolean values.
#
# This is limited to lower-case, even though boolean() is case-insensitive.
#
# @return [Array]
# @raise
# @api private
def self.boolean_values
['true', 'false', 'yes', 'no']
end
end
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