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clipsarrow-keys

Arrow keys not working in CLIPS?

For some reason, I cannot navigate the CLIPS interpreter with my arrow keys. When I press the left arrow key, I get the escape code ^[[D (and various escape codes for the remaining arrow keys). I'm running Linux and followed the installation steps outlined in section 2.1 and 2.1.1 of the Advance Programmer's Guide. Please note that I am using the CLIPS version 6.40 beta 2 release. Also, I verified the sha1 and md5 hashes before extracting the source code.

Steps used to compile:

  • Navigated to extracted source directory.
  • Entered the command as stated in section 2.1.1 under the UNIX heading gcc -o clips *.c -lm.
  • Ran compiled program.

To remedy this I have tried:

  • Compiling separate interpreters with the -DGENERIC=1 and -DLINUX=1 build flags.
  • Re-downloading the source code and recompiling it.
  • Downloading and compiling the latest stable (version 6.30) of CLIPS using the same steps outlined above.
  • Using the makefile included in each version to compile rather than using gcc.

Aside from this issue, CLIPS seems to be working fine. I talked to one of my peers that's using the Windows version, and he is able to navigate with the arrow keys just fine.

Thanks in advance!

Solution

  • Use of the arrow keys at the CLIPS command prompt is not supported in the cross-platform core source code. Use of the arrow keys is supported in the Windows, macOS, and Java Swing Integrated Development Environments.