Enum Field 

pub enum Field {
    MsgSeqNum(MsgSeqNum),
    SenderCompID(SenderCompID),
    SendingTime(SendingTime),
    TargetCompID(TargetCompID),
    Custom {
        tag: u16,
        value: Vec<u8>,
    },
}

Represents a single FIX field.

Each variant corresponds to a strongly-typed FIX tag, such as MsgSeqNum(34) or SenderCompID(49). Fields not covered by predefined variants can be represented using Field::Custom.

Variants

MsgSeqNum(MsgSeqNum)

Message sequence number (34).

Used to identify message ordering within a FIX session.

SenderCompID(SenderCompID)

Sender company or system identifier (49).

Identifies the sender of the message in a FIX session.

SendingTime(SendingTime)

Message sending time (52).

Timestamp representing when the message was sent.

TargetCompID(TargetCompID)

Target company or system identifier (56).

Identifies the intended recipient of the message in a FIX session.

Custom

Represents an arbitrary or user-defined FIX field not covered by the predefined variants.

Useful for extension tags, firm-specific fields, or when working with non-standard message structures.

Fields

tag: u16

Tag of the custom field.

value: Vec<u8>

Contents of the custom field.

Implementations

impl Field

pub fn try_new(tag: u16, bytes: &[u8]) -> Result<Self, Box<dyn Error>>

Tries to construct a new Field from the given tag and value.

Errors

This function might return error if invalid values are passed for the given tag.

pub fn tag(&self) -> u16

Returns the numeric FIX tag associated with this field.

Example usage:

use trafix_codec::message::field::{Field, value::aliases::MsgSeqNum};
let f = Field::MsgSeqNum(1);
assert_eq!(f.tag(), 34);

pub fn value(&self) -> Vec<u8>

Returns the serialized value of the field as raw bytes.

For predefined fields, this returns their encoded textual representation (e.g. integer → ASCII). For custom fields, the original byte vector is cloned.

pub fn encode(&self) -> Vec<u8>

Serializes the field into its "tag=value" representation.

This does not append the SOH delimiter; it only produces the byte content for a single field. The encoder is responsible for joining fields with SOH (0x01).

use trafix_codec::message::field::{Field, value::aliases::MsgSeqNum};
let f = Field::MsgSeqNum(4);
assert_eq!(f.encode(), b"34=4".to_vec());

Trait Implementations

impl Clone for Field

fn clone(&self) -> Field

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Field

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

Formats the value using the given formatter.

impl PartialEq for Field

fn eq(&self, other: &Field) -> 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 StructuralPartialEq for Field