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module custom_operator_09_mod
implicit none
type string_t
character(:), allocatable :: value
contains
procedure, private, pass(rhs) :: character_cat_string_t
generic :: operator(//) => character_cat_string_t
end type string_t
contains
elemental function character_cat_string_t(lhs, rhs) result(lhs_cat_rhs)
character(len=*), intent(in) :: lhs
class(string_t), intent(in) :: rhs
type(string_t) :: lhs_cat_rhs
lhs_cat_rhs % value = lhs // rhs % value
end function character_cat_string_t
end module custom_operator_09_mod
program custom_operator_09
use custom_operator_09_mod
implicit none
type(string_t) :: name_obj, greeting_obj
character(len=10) :: prefix
name_obj%value = "world!"
prefix = "hello, "
greeting_obj = prefix // name_obj
if (greeting_obj%value /= "hello, world!") error stop
end program custom_operator_09
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