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Contents
require 'puppet/parser/ast/branch'
class Puppet::Parser::AST
# An AST object to call a function.
class Function < AST::Branch
associates_doc
attr_accessor :name, :arguments, :pblock
def evaluate(scope)
# Make sure it's a defined function
raise Puppet::ParseError, "Unknown function #{@name}" unless Puppet::Parser::Functions.function(@name)
# Now check that it's been used correctly
case @ftype
when :rvalue
raise Puppet::ParseError, "Function '#{@name}' does not return a value" unless Puppet::Parser::Functions.rvalue?(@name)
when :statement
# It is harmless to produce an ignored rvalue, the alternative is to mark functions
# as appropriate for both rvalue and statements
# Keeping the old behavior when a pblock is not present. This since it is not known
# if the lambda contains a statement or not (at least not without a costly search).
# The purpose of the check is to protect a user for producing a meaningless rvalue where the
# operation has no side effects.
#
if !pblock && Puppet::Parser::Functions.rvalue?(@name)
raise Puppet::ParseError,
"Function '#{@name}' must be the value of a statement"
end
else
raise Puppet::DevError, "Invalid function type #{@ftype.inspect}"
end
# We don't need to evaluate the name, because it's plaintext
args = @arguments.safeevaluate(scope).map { |x| x == :undef ? '' : x }
# append a puppet lambda (unevaluated) if it is defined
args << pblock if pblock
scope.send("function_#{@name}", args)
end
def initialize(hash)
@ftype = hash[:ftype] || :rvalue
hash.delete(:ftype) if hash.include? :ftype
super(hash)
# Lastly, check the parity
end
def to_s
args = arguments.is_a?(ASTArray) ? arguments.to_s.gsub(/\[(.*)\]/,'\1') : arguments
"#{name}(#{args})"
end
end
end
Version data entries
90 entries across 90 versions & 2 rubygems