[Overview][Constants][Types][Classes][Procedures and functions][Variables][Index] | Reference for unit 'Variants' (#rtl)

# TNullCompareRule

Enumeration describing how to handle Null values when comparing variants.

## Declaration

Source position: variants.pp line 52

`type TNullCompareRule = (`
`ncrError,` |  | Raise an error when one of the values is Null.
`ncrStrict,` |  | Act as if the comparison is false
`ncrLoose` |  | Attempt to compare anyway
`);`

## Description

TNullCompareRule is the type for the NullEqualityRule and NullMagnitudeRule variables. It can have the following values:

ncrError
  Raise an error when one of the values is Null.
ncrStrict
  Act as if the comparison is false
ncrLoose
  Attempt to compare anyway

Documentation generated on: May 14 2021