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module Bogus
class MethodStringifier
def stringify(method, body)
<<-RUBY
def #{method.name}(#{arguments_as_string(method.parameters)})
#{body}
end
RUBY
end
def arguments_as_string(arguments)
stringify_arguments(arguments, DefaultValue)
end
def argument_values(arguments)
stringify_arguments(arguments)
end
private
def stringify_arguments(arguments, default = nil)
fill_in_missing_names(arguments).map do |type, name|
argument_to_string(name, type, default)
end.join(', ')
end
def argument_to_string(name, type, default)
case type
when :block then "&#{name}"
when :key then default ? "#{name}: #{default}" : "#{name}: #{name}"
when :keyreq then default ? "#{name}:" : "#{name}: #{name}"
when :opt then default ? "#{name} = #{default}" : name
when :req then name
when :rest then "*#{name}"
when :keyrest then "**#{name}"
else raise "unknown argument type: #{type}"
end
end
def fill_in_missing_names(arguments)
noname_count = 0
arguments.map do |type, name|
unless name
name = "_noname_#{noname_count}"
noname_count += 1
end
[type, name]
end
end
end
end
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