Struct DerivedParameter 

pub struct DerivedParameter {
    pub name: ParameterName,
    pub kind: ValueKind,
    pub expression: Expression,
    pub labels: Labels,
    pub tags: Tags,
}

A parameter whose value is computed from other already-bound values by an Expression.

Derived parameters may not be used as axes (SRD-0004 D9) — that’s enforced by the test-plan layer.

Fields

name: ParameterName

Parameter name.

kind: ValueKind

Declared output kind (Integer/Double/Boolean/String).

expression: Expression

The expression that produces the value.

labels: Labels

Intrinsic facts.

tags: Tags

Organisational tags.

Implementations

impl DerivedParameter

pub fn new( name: ParameterName, kind: ValueKind, expression: Expression, ) -> Result<Self>

Construct a derived parameter. Rejects ValueKind::Selection.

pub fn compute( &self, bindings: &ValueBindings, ) -> Result<Value, DerivationError>

Evaluate the expression against the given bindings and wrap the result in a Value with Derived provenance.

pub fn with_label(self, key: LabelKey, value: LabelValue) -> Result<Self>

Add a label.

pub fn with_tag(self, key: TagKey, value: TagValue) -> Result<Self>

Add a tag.

Trait Implementations

impl Attributed for DerivedParameter

fn labels(&self) -> &Labels

Intrinsic facts.

fn tags(&self) -> &Tags

Extrinsic organisation.

impl Clone for DerivedParameter

fn clone(&self) -> DerivedParameter

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for DerivedParameter

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for DerivedParameter

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for DerivedParameter

fn eq(&self, other: &DerivedParameter) -> 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 Serialize for DerivedParameter

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for DerivedParameter