ComparisonEvaluator class
Comparison operators. A comparison operator returns false if the comparison is false, or there is an error. This prevents errors from short-circuiting boolean expressions.
- Extends
Constructors
| Comparison |
Initializes a new instance of the ComparisonEvaluator class. |
Properties
| negation | Gets the evaluator that is a negation of this one. Sets the evaluator that is a negation of this one. |
Inherited Properties
| return |
Type expected by evaluating the expression. |
| type | Gets the expression type for evaluator. |
Inherited Methods
| try |
Evaluate an expression. |
| validate |
Validate an expression. |
Constructor Details
ComparisonEvaluator(string, (arg0: any[]) => boolean, ValidateExpressionDelegate, VerifyExpression)
Initializes a new instance of the ComparisonEvaluator class.
new ComparisonEvaluator(type: string, func: (arg0: any[]) => boolean, validator: ValidateExpressionDelegate, verify?: VerifyExpression)Parameters
- type
-
string
Name of the built-in function.
- func
-
(arg0: any[]) => boolean
The comparison function, it takes a list of objects and returns a boolean.
- validator
- ValidateExpressionDelegate
(xref:adaptive-expressions.ValidateExpressionDelegate) for input arguments.
- verify
- VerifyExpression
Optional. VerifyExpression function to verify each child's result.
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.
Inherited Property Details
returnType
Type expected by evaluating the expression.
returnType: ReturnTypeProperty Value
Inherited From ExpressionEvaluator.returnType
type
Gets the expression type for evaluator.
type: stringProperty Value
string
Inherited From ExpressionEvaluator.type
Inherited 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.
Inherited From ExpressionEvaluator.tryEvaluate
validateExpression(Expression)
Validate an expression.
function validateExpression(expression: Expression)Parameters
- expression
- Expression
Expression to validate.
Inherited From ExpressionEvaluator.validateExpression