Struct EvalCtx 

pub struct EvalCtx<'a> {
    pub note: &'a Note,
    pub corpus: &'a Corpus,
    pub this: Option<&'a Note>,
    pub formulas: &'a BTreeMap<String, Expr>,
    /* private fields */
}

Everything an expression needs to evaluate: the note it’s evaluated against, the whole corpus (for backlinks/link resolution), the base’s formula definitions, and an optional this context note (the note a base is embedded in). Formula evaluation is memoized per note with a cycle guard.

Fields

note: &'a Note

corpus: &'a Corpus

this: Option<&'a Note>

formulas: &'a BTreeMap<String, Expr>

Formula name → parsed expression (shared across the whole base).

Implementations

impl<'a> EvalCtx<'a>

pub fn new( note: &'a Note, corpus: &'a Corpus, formulas: &'a BTreeMap<String, Expr>, ) -> Self

pub fn with_this(self, this: Option<&'a Note>) -> Self

pub fn eval_formula(&self, name: &str) -> Value

Evaluate a named formula against this context’s note, memoized, with a cycle guard (a self-referential formula yields Null).

pub fn eval(&self, expr: &Expr) -> Value

Evaluate an expression to a value. Depth-guarded: a pathologically deep AST resolves to Null past MAX_EVAL_DEPTH rather than overflowing the stack.