EvaluationContext class

Provides the necessary context for evaluating expressions : variables, constants and functions.

Constructors

EvaluationContext({Map<String, Object?> constants = defaultConstants, List<EvaluableFunction> functions = defaultFunctions})

Creates a new evaluation context instance.

Properties

hashCode → int

The hash code for this object.

no setter, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

clearIdentifiersValues() → void

Clears all identifiers values.

getIdentifierValue(String identifier) → Object?

Returns an identifier value.

hasIdentifierValue(String identifier) → bool

Checks if the context has the corresponding value.

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

removeIdentifierValue(String identifier) → Object?

Removes an identifier value.

setIdentifierValue(String identifier, Object? value, {bool constant = false}) → Object?

Sets an identifier value.

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited

Static Methods

isVariableValueValid(Object? value) → bool

Checks if a variable value can be used.

Constants

defaultConstants → const Map<String, Object?>

The default constants.

defaultFunctions → const List<EvaluableFunction>

The default functions.