Struct ExprContext 

pub struct ExprContext {
    pub input: Value,
    pub steps: HashMap<String, StepResult>,
}

Evaluation context holding pipeline state.

Fields

input: Value

steps: HashMap<String, StepResult>

Implementations

impl ExprContext

pub fn new(input: Value) -> Self

pub fn eval(&self, expr: &str) -> Result<Value, ExprError>

Resolve an expression string to a JSON value.

• {{ path }} (entire string) — resolves to the typed JSON value at path.
• Strings containing one or more {{ path }} snippets — interpolated: each snippet is replaced with its string representation; result is a JSON string.
• Plain strings with no {{ }} — returned unchanged as a JSON string.

pub fn eval_f32(&self, expr: &str) -> Result<f32, ExprError>

Resolve an expression to f32 (for confidence routing).