Passing the typedesc as a param to the constraint() method returns () in success case

[chamil321]

Description:
$subject. In HTTP, the expected type is coming from an HTTP API, hence constraint method cannot infer the expected type from the LHS. So when the expected type was passed as the second param, the validation happens and return ()

Steps to reproduce:

isolated function performDataValidation(anydata payload, typedesc<anydata> targetType) returns anydata|ClientError {
    anydata|error validPayload = constraint:validate(payload, targetType);
    if validPayload is error {
        return error PayloadValidationClientError("payload validation failed: " + validPayload.message(), validPayload);
    } else {
        return validPayload; // this value is ()
    }
}

Affected Versions:
1.0.0-20220711-153400-5cab109

[dilanSachi]

Noticed this even for a case as follows.

StringConstraintConsumerRecord|error result = constraint:validate(payload);

[github-actions]

This issue is NOT closed with a proper Reason/ label. Make sure to add proper reason label before closing. Please add or leave a comment with the proper reason label now.

      - Reason/EngineeringMistake - The issue occurred due to a mistake made in the past.
      - Reason/Regression - The issue has introduced a regression.
      - Reason/MultipleComponentInteraction - Issue occured due to interactions in multiple components.
      - Reason/Complex - Issue occurred due to complex scenario.
      - Reason/Invalid - Issue is invalid.
      - Reason/Other - None of the above cases.