MicroPython Forum (Archive)

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// This mp_obj_type_t struct is a concrete MicroPython object which holds info
// about a type.  See below for actual definition of the struct.
typedef struct _mp_obj_type_t mp_obj_type_t;

// Anything that wants to be a concrete MicroPython object must have mp_obj_base_t
// as its first member (small ints, qstr objs and inline floats are not concrete).
struct _mp_obj_base_t {
    const mp_obj_type_t *type MICROPY_OBJ_BASE_ALIGNMENT;
};
typedef struct _mp_obj_base_t mp_obj_base_t;

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#if MICROPY_PY_COLLECTIONS

typedef struct _mp_obj_namedtuple_type_t {
    mp_obj_type_t base;
    size_t n_fields;
    qstr fields[];
} mp_obj_namedtuple_type_t;

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mp_obj_type_t 

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mp_obj_base_t 

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mp_obj_base_t 

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mp_obj_type_t *

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typedef struct _mp_obj_type_t mp_obj_type_t;

struct _mp_obj_type_t {
    // A type is an object so must start with this entry, which points to mp_type_type.
    mp_obj_base_t base;

    // The name of this type.
    qstr name;

    // Corresponds to __repr__ and __str__ special methods.
    mp_print_fun_t print;
...

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struct _mp_obj_base_t {
    const mp_obj_type_t *type MICROPY_OBJ_BASE_ALIGNMENT;
};
typedef struct _mp_obj_base_t mp_obj_base_t;