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# CStruct Examples
require 'cstruct'
# example:
# struct U in C\C++ (32-bit platform):
#
# struct U
# {
# union{
# int x;
# int y;
# }value; /* values is anonymous union's instance */
# };
# struct U in Ruby:
class U < CStruct
union:value do
int32:x
int32:y
end
end
# or like this (use brace):
# class U < CStruct
# union (:position) {
# int32:x
# int32:y
# }
# end
# create a U's instance
u = U.new
# Notice! Assign is different from C language.
# 'value' can not be omitted !
u.value.x = 10
puts "sizeof(U) = #{U.__size__}" # "__size__" is alias of "size" . You may use 'size'.
puts "u.value.x = #{u.value.x }, u.value.y = #{u.value.y }"
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