mirror of
https://github.com/PHPOffice/PhpSpreadsheet.git
synced 2026-08-25 01:58:21 +00:00
oleibman
40f7cd00db
We have identical constants defined in several places, and use literals in others. We aren't consistent in checking limits. This PR makes the use of the constants in Cell/AddressRange the "official" source, deprecates all other constants, and substitutes the constants wherever literals are used. A number of different edge case tests are added. During testing, I discovered that `columnIndexFromString` correctly throws an exception for 4-character string, but allows `XFE` through `ZZZ`, all of which are also invalid. There are similar inconsistencies with related routines, and this PR attempts to make them operate consistently. One suprise is that throwing for `row=0` causes serious regression problems, so it continues to be permitted (but the high row limit is enforced). Further, Reference Helper sometimes dips into negative numbers, resulting in totally unexpected results (-1 affects column Z, -2 column Y, etc.). It is changed to ignore rows and columns outside the limits.