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class BoolException < RuntimeError
end
# bool
#
# For the bool type,
# - TRUE values are represented by "true" or "yes" (case-insensitive), true and any non-zero integer
# - FALSE values by "false", "no" or empty string (case-insensitive), false and zero.
#
# Example
#
# graph[:center] = "true"
# or
# graph[:center] = true
# or
# graph[:center] = 23
class GraphViz
class Types
class GvBool < Common
BOOL_TRUE = ["true", "yes"]
BOOL_FALSE = ["false", "no", ""]
def check(data)
if true == data or (data.is_a?(Integer) and data != 0) or (data.is_a?(String) and !BOOL_FALSE.include?(data.downcase))
@to_ruby = true
return data
end
if false == data or (data.is_a?(Integer) and data == 0) or (data.is_a?(String) and BOOL_FALSE.include?(data.downcase))
@to_ruby = false
return data
end
raise BoolException, "Invalid bool value"
end
def output
return @data.to_s.inspect.gsub( "\\\\", "\\" )
end
alias :to_gv :output
alias :to_s :output
def to_ruby
@to_ruby
end
end
end
end
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