Error Messages/40222

Error message

Lexical error at line 1 while checking One_nested_item_should_not_parse:

[1,2,[3,4],5]
     ￪

Unindexed lists cannot be nested. A value may contain only one unindexed dimension.

Description

An array value can contain at most one implicit dimension. A nested list, as appears here, would introduce a second implicit (unnamed) dimension, and thus violate this principle.

If you really want to create a data structure with nested lists, you can do so using references, e.g.,

[1, 2, \([3,4]), 5]

See also

• Implicit Dimensions
• Error message Trying to combine two arrays with implicit indexes.
• Slicing on an implicit (list) dimension