gistfile1.rb

# copy and paste this into IRB...
#
require 'ffi'

class Foo < FFI::Struct
  layout :ary, [:uint16, 10]
end


f = Foo.new
# => #<Foo:0x19bb51c>

f[:ary].class
# => FFI::Struct::InlineArray

# and something with InlineArray is broken...
f[:ary]
# NoMethodError: to_s not defined for this array type
#   from /usr/lib/ruby/1.8/irb.rb:302:in `to_s'
#   from /usr/lib/ruby/1.8/irb.rb:302:in `inspect'
#   from /usr/lib/ruby/1.8/irb.rb:302:in `output_value'
#   from /usr/lib/ruby/1.8/irb.rb:151:in `eval_input'
#   from /usr/lib/ruby/1.8/irb.rb:263:in `signal_status'
#   from /usr/lib/ruby/1.8/irb.rb:147:in `eval_input'
#   from /usr/lib/ruby/1.8/irb/ruby-lex.rb:244:in `each_top_level_statement'
#   from /usr/lib/ruby/1.8/irb/ruby-lex.rb:230:in `loop'
#   from /usr/lib/ruby/1.8/irb/ruby-lex.rb:230:in `each_top_level_statement'
#   from /usr/lib/ruby/1.8/irb/ruby-lex.rb:229:in `catch'
#   from /usr/lib/ruby/1.8/irb/ruby-lex.rb:229:in `each_top_level_statement'
#   from /usr/lib/ruby/1.8/irb.rb:146:in `eval_input'
#   from /usr/lib/ruby/1.8/irb.rb:70:in `start'
#   from /usr/lib/ruby/1.8/irb.rb:69:in `catch'
#   from /usr/lib/ruby/1.8/irb.rb:69:in `start'
#   from /usr/bin/irb:13