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

# TCompareOption

How to compare strings

## Declaration

Source position: ustringh.inc line 60

`type TCompareOption = (`
`coIgnoreCase` |  | Ignore case (usually identical to coLingIgnoreCase)
`);`

## Description

TCompareOption indicates how 2 strings should be compared. This option is used in the WideStringManager implementation when comparing 2 strings. The following options exist:

  Ignore case linguistically (usually identical to coIgnoreCase)
  Ignore diacritic characters
  Ignore case (usually identical to coLingIgnoreCase)
  Corresponding hiragana and katakana characters compare as equal.
  Corresponding hiragana and katakana characters compare as equal.
  Ignore nonspace characters (usually identical to coLingIgnoreDiacritic)
  Ignore symbols and punctuation characters
  Ignore half-width and full width characters (used in Chinese and Japanese)
  Use linguistic rules for casing, instead of file system rules
  Treat digits as numbers (20 before 120)
  Handle punctuation as symbols

Not all platforms will support all possibilities.

## See also

TWideStringManager |  | Record containing the various callbacks of the widestring manager.