Struct RuntimeWarning 

pub struct RuntimeWarning {
    pub code: WarningCode,
    pub flow_name: String,
    pub backend: String,
    pub fallback_mode: FallbackMode,
    pub step_name: Option<String>,
    pub declared_output: String,
    pub message: String,
    pub timestamp_ms: u64,
}

One runtime warning entry. Immutable once minted. Surfaces on axon.complete.warnings[*] (wire) and replay.runtime_warnings[*] (audit).

Required fields (per D5 + plan vivo §1)

• code — closed-catalog WarningCode.
• flow_name — the flow whose streaming declaration fell back.
• backend — the backend name (post-auto resolution) that was attempted.
• fallback_mode — the FallbackMode tag identifying WHY.
• step_name — optional step name when the warning is step-scoped (e.g. one step has an unsupported feature, the others are fine). None for flow-scoped warnings.
• declared_output — the adopter-source output: declaration (e.g. "Stream<Token>") that triggered the streaming expectation. Empty when the warning is not tied to a specific declaration.
• message — human-readable summary. Equals code.message() by default; adopters can include context-specific detail (e.g. the exact IRFlowNode variant that triggered UnsupportedFlowShape).

Fields

code: WarningCode

flow_name: String

backend: String

fallback_mode: FallbackMode

step_name: Option<String>

declared_output: String

message: String

timestamp_ms: u64

Unix-millis timestamp when the warning was minted. Monotonic within a flow execution; multiple warnings preserve insertion order via the carrying Vec.

Implementations

impl RuntimeWarning

pub fn streaming_not_supported( flow_name: impl Into<String>, backend: impl Into<String>, fallback_mode: FallbackMode, detail: impl Into<String>, ) -> Self

Construct a W002 streaming-not-supported warning with the canonical message.

Trait Implementations

impl Clone for RuntimeWarning

fn clone(&self) -> RuntimeWarning

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for RuntimeWarning

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for RuntimeWarning

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for RuntimeWarning

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.