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require 'puppet/parser/ast/branch'
class Puppet::Parser::AST
# The inline conditional operator. Unlike CaseStatement, which executes
# code, we just return a value.
class Selector < AST::Branch
attr_accessor :param, :values
def each
[@param,@values].each { |child| yield child }
end
# Find the value that corresponds with the test.
def evaluate(scope)
# Get our parameter.
paramvalue = @param.safeevaluate(scope)
default = nil
unless @values.instance_of? AST::ASTArray or @values.instance_of? Array
@values = [@values]
end
# Then look for a match in the options.
@values.each do |obj|
# short circuit asap if we have a match
return obj.value.safeevaluate(scope) if obj.param.evaluate_match(paramvalue, scope)
# Store the default, in case it's necessary.
default = obj if obj.param.is_a?(Default)
end
# Unless we found something, look for the default.
return default.value.safeevaluate(scope) if default
self.fail Puppet::ParseError, "No matching value for selector param '%s'" % paramvalue
ensure
scope.unset_ephemeral_var
end
def to_s
param.to_s + " ? { " + values.collect { |v| v.to_s }.join(', ') + " }"
end
end
end
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