Evaluates an expression and returns its result as a bag.
A literal, a designator, a selector, a variable reference, an Apply or
a function reference; a failure is thrown as an XACML error rather
than returned.
Parameters
expression: any
the expression, in the shapes of xacml_model.js
context: any
the evaluation context from makeContext()
variables: any
the policy's variable table from makeVariables(),
or null
Evaluates an expression and returns its result as a bag.
A literal, a designator, a selector, a variable reference, an Apply or a function reference; a failure is thrown as an XACML error rather than returned.