Windows 10: GHCi v8.8.1 ignores 'ANSI' codes in its prompt
Summary
On Windows 10, GHCi v8.8.1 is 'ANSI escape codes-aware' but 'ANSI' codes in the GHCi prompt are not intercepted and processed and do not have the expected effect.
Steps to reproduce
>stack exec -- ghci --version
The Glorious Glasgow Haskell Compilation System, version 8.8.1
>stack exec -- ghci
GHCi, version 8.8.1: https://www.haskell.org/ghc/ :? for help
Prelude> :set prompt "\ESC[34mBlue?\ESC[39m"
[34mBlue?[39m
[34mBlue?[39mputStrLn "\ESC[34mThis is blue text, as expected.\ESC[39m"
This is blue text, as expected.
[34mBlue?[39m
In the example above, the GHCi prompt is not set to Blue?
(in blue text), as expected, but to [34mBlue?[39m
(the \ESC
characters not printing).
Environment
- GHC version used: 8.8.1 (also true for 8.6.5)
Optional:
- Operating System: Windows 10
- System Architecture: x64