Struct ConstEvaluator 

pub struct ConstEvaluator { /* private fields */ }

Const evaluator for metadata() handlers

Implementations

impl ConstEvaluator

pub fn new() -> Self

Create a new const evaluator with annotation parameters

pub fn with_params(params: HashMap<String, ValueWord>) -> Self

Create a const evaluator with annotation parameters

pub fn add_param(&mut self, name: String, value: ValueWord)

Add an annotation parameter to the scope

pub fn add_param_nb(&mut self, name: String, value: ValueWord)

Add an annotation parameter to the scope (ValueWord, avoids ValueWord conversion)

pub fn eval(&self, expr: &Expr) -> Result<ValueWord>

Evaluate an expression as a const (compile-time) value

Returns an error if the expression uses non-const constructs.

pub fn eval_as_nb(&self, expr: &Expr) -> Result<ValueWord>

Evaluate an expression as a const ValueWord value (avoids ValueWord materialization)

Trait Implementations

impl Clone for ConstEvaluator

fn clone(&self) -> ConstEvaluator

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ConstEvaluator

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

Formats the value using the given formatter.

impl Default for ConstEvaluator

fn default() -> Self

Returns the “default value” for a type.