Structs

Structs

Structs are created with compost_rpc.struct decorator. They may contain primitive types, enums, bytes, strings, lists and even other structs.

It is important to note that structs are basically invisible when inspecting the raw message frames - it will look the same as if all member values were sent as separate arguments. In other words, the layout of struct is not part of the message, only the data.

What you define in protocol_def.py

from compost_rpc import struct

@struct
class LogMessage:
    severity: U8
    tag: U8
    message: str

What you get in compost.h

struct LogMessage {
    uint8_t severity;
    uint8_t tag;
    struct CompostSliceU8 message;
};