Struct VmOpMerge 

pub struct VmOpMerge {
    pub skip_submessages: Option<bool>,
    pub del_if_src_empty: Option<bool>,
}

Merges SRC into DST. Both need to point to a message (not a field).

Fields

skip_submessages: Option<bool>

When true, the merge operation will skip any field that is already resolved as a message node in the destination tree.

This is used to support merging of nested messages. Because ProtoVM does not know the schema, a standard MERGE cannot distinguish between a string and a message on the wire and it would overwrite the entire blob, destroying granular updates.

By setting this to true, a program can be implemented to do a bottom-up, multi-step merge by traversing into and merging the deepest submessages first, then moving up to the parent message and merging it with skip_submessages = true.

del_if_src_empty: Option<bool>

When true, the merge operation will remove the dst field if the src field is empty.

This can be used to replicate the removal of a subobject within the producer’s state. E.g. This event on the producer side: mProducerState.mSubobject = nullptr can be represented by this patch: { producer_state { subobject {} }}

Implementations

impl VmOpMerge

pub fn skip_submessages(&self) -> bool

Returns the value of skip_submessages, or the default value if skip_submessages is unset.

pub fn del_if_src_empty(&self) -> bool

Returns the value of del_if_src_empty, or the default value if del_if_src_empty is unset.

Trait Implementations

impl Clone for VmOpMerge

fn clone(&self) -> VmOpMerge

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for VmOpMerge

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for VmOpMerge

fn default() -> Self

Returns the “default value” for a type.

impl Hash for VmOpMerge

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Message for VmOpMerge

fn encoded_len(&self) -> usize

Returns the encoded length of the message without a length delimiter.

fn clear(&mut self)

Clears the message, resetting all fields to their default.

fn encode(&self, buf: &mut impl BufMut) -> Result<(), EncodeError>

where Self: Sized,

Encodes the message to a buffer.

fn encode_to_vec(&self) -> Vec<u8>

where Self: Sized,

Encodes the message to a newly allocated buffer.

fn encode_length_delimited( &self, buf: &mut impl BufMut, ) -> Result<(), EncodeError>

where Self: Sized,

Encodes the message with a length-delimiter to a buffer.

fn encode_length_delimited_to_vec(&self) -> Vec<u8>

where Self: Sized,

Encodes the message with a length-delimiter to a newly allocated buffer.

fn decode(buf: impl Buf) -> Result<Self, DecodeError>

where Self: Default,

Decodes an instance of the message from a buffer.

fn decode_length_delimited(buf: impl Buf) -> Result<Self, DecodeError>

where Self: Default,

Decodes a length-delimited instance of the message from the buffer.

fn merge(&mut self, buf: impl Buf) -> Result<(), DecodeError>

where Self: Sized,

Decodes an instance of the message from a buffer, and merges it into self.

fn merge_length_delimited(&mut self, buf: impl Buf) -> Result<(), DecodeError>

where Self: Sized,

Decodes a length-delimited instance of the message from buffer, and merges it into self.

impl PartialEq for VmOpMerge

fn eq(&self, other: &VmOpMerge) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for VmOpMerge

impl Eq for VmOpMerge

impl StructuralPartialEq for VmOpMerge