[GROOVY-8312] [PARROT] Deprecate useless features on unicode sequences

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.6.0-alpha-1
• Fix Version/s: 3.0.0-alpha-1, 2.6.0-alpha-2
• Assignee: Daniel Sun
• Reporter: Daniel Sun
• Created: 08/Sep/17 17:10
• Updated: 20/May/19 07:05
• Resolved: 08/Sep/17 19:02

Description

1) Declaring identifier with unicode sequences , e.g. `def \u4e00\u9fa5 =
123`
2) All source code is written in unicode sequence, e.g. `\u0064\u0065\u0066
\u0061 \u003d \u0031\u0032\u0033`, the corresponding readable code is `def a
= 123`
3) Unicode sequences like `\uuuuuuuuuu9fa5` is allowed in Groovy