ExpressionEvaluator class
Information on how to evaluate an expression.
Constructors
| Expression |
Initializes a new instance of the class. |
Properties
| negation | Gets the evaluator that is a negation of this one. Sets the evaluator that is a negation of this one. |
| return |
Type expected by evaluating the expression. |
| type | Gets the expression type for evaluator. |
Methods
| try |
Evaluate an expression. |
| validate |
Validate an expression. |
Constructor Details
ExpressionEvaluator(string, EvaluateExpressionDelegate, ReturnType, ValidateExpressionDelegate)
Initializes a new instance of the class.
new ExpressionEvaluator(type: string, evaluator: EvaluateExpressionDelegate, returnType: ReturnType, validator?: ValidateExpressionDelegate)Parameters
- type
-
string
Expression type.
- evaluator
- EvaluateExpressionDelegate
Delegate to evaluate an expression.
- returnType
- ReturnType
Type expected from evaluation.
- validator
- ValidateExpressionDelegate
Static validation of expression.
Property Details
negation
Gets the evaluator that is a negation of this one. Sets the evaluator that is a negation of this one.
ExpressionEvaluator negationProperty Value
The evaluator that is a negation of this one.
returnType
type
Gets the expression type for evaluator.
type: stringProperty Value
string
Method Details
tryEvaluate(Expression, MemoryInterface, Options)
Evaluate an expression.
function tryEvaluate(expression: Expression, state: MemoryInterface, options: Options): ValueWithErrorParameters
- expression
- Expression
Expression to evaluate.
- state
- MemoryInterface
Global state information.
- options
- Options
Options used in the evaluation.
Returns
The value and error string that is non-null if there is an error.
validateExpression(Expression)
Validate an expression.
function validateExpression(expression: Expression)Parameters
- expression
- Expression
Expression to validate.