invalidCharsGroup top-level constant

String const invalidCharsGroup

A string containing Unicode representations of characters considered invalid in certain contexts.

The characters in this group are:

• U+FFFE: a non character reserved for internal use
• U+FEFF: Zero Width No-Break Space, also used as a byte order mark (BOM)
• U+FFFF: another non character reserved for internal use

These characters are typically used to identify invalid or unexpected character sequences when processing Unicode text.

Implementation

const invalidCharsGroup = r'\uFFFE'
    r'\uFEFF'
    r'\uFFFF';