Enum VariableMapTransform 

pub enum VariableMapTransform {
    Named(String),
    Expression(ExpressionNode),
}

A variable_map coupling transform (esm-spec §10.4): either one of the NAMED transform strings ("param_to_var", "identity", "additive", "multiplicative", "conversion_factor") or an Expression evaluated on the source value(s) in the flattened coupled system’s scope (the regridding form).

On the wire an Expression transform is always an operator-node OBJECT: the degenerate bare-reference and literal Expression spellings are not admissible (the named string transforms already cover bare replacement, and the string space is reserved for them), so a JSON string deserializes to VariableMapTransform::Named, an object to VariableMapTransform::Expression, and a bare number is rejected.

Variants

Named(String)

Legacy named transform string.

Expression(ExpressionNode)

Expression transform: an operator node whose variable references are fully scoped and which MUST reference the entry’s from variable (esm-spec §10.4). Template invocations inside it are expanded at load.

Implementations

impl VariableMapTransform

pub fn as_named(&self) -> Option<&str>

The named transform string, if this is the legacy string form.

pub fn as_expression(&self) -> Option<&ExpressionNode>

The Expression operator node, if this is the expression form.

pub fn is_expression(&self) -> bool

Whether this is the expression form.

Trait Implementations

impl Clone for VariableMapTransform

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for VariableMapTransform

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for VariableMapTransform

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Display for VariableMapTransform

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

Named transforms display as their string; expression transforms as the fixed token expression (matching the Julia / Python provenance descriptions in coupling_rules_applied).

impl PartialEq for VariableMapTransform

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for VariableMapTransform

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 VariableMapTransform