Generate container_of helper for struct member

Creates a function that recovers the parent struct pointer from a pointer to one of its members. This is the classic Linux kernel container_of macro made accessible from R.

Usage

tcc_container_of(ffi, struct_name, member_name)

Arguments

ffi

A tcc_ffi object

struct_name

Struct name

member_name

Member field name to compute offset from

Value

Updated tcc_ffi object

Examples

if (FALSE) { # \dontrun{
ffi <- tcc_ffi() |>
  tcc_struct("student", list(id = "i32", marks = "i32")) |>
  tcc_container_of("student", "marks") # Creates struct_student_from_marks()
} # }