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Add developer notes to the language README files

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Nilay Majorwar
2022-02-18 20:50:53 +05:30
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languages/brainfuck/README.md
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# Brainfuck
## References
Brainfuck is perhaps the most popular esoteric programming language, created by Urban Müller in 1993.
It is Turing-complete and has 8 instructions which operate on a linear array of cells storing integer values.
The [esolangs wiki page](https://esolangs.org/wiki/Brainfuck) contains the language specification and some
sample programs.
- Esolangs wiki: https://esolangs.org/wiki/Brainfuck
Note that brainfuck has minor variants which primarily differ in the workings of the cell array. You may find
many brainfuck programs which don't work correctly on Esolang Park.
## Implementation details
## Notes for the user
- The tape is semi-unbounded (0, 1, 2 ...)
- Cell size is 8 bits, and allows values in the range `[-128, 127]`.
- Value `10` is designated for newlines.
- The value `0` is returned on reaching `EOF`.
- The cell array is semi-infinite. There is no cell to the left of the initial cell, and trying to go left
anyway will result in a runtime error. The right side of the cell array is unbounded.
- Cell size is 8 bits, and allows values in the range `[-128, 127]`. Values loop over to the other side on reaching the bounds.
- The usual ASCII value `10` is designated for newlines.
- The value `0` is returned in input (`,`) operations on reaching `EOF`.
## Possible improvements
- The renderer currently uses Blueprint's `Card` component. This leads to performance issues when the stack grows large.
Usage of this component should be replaced by a simple custom component to drastically improve performance. Look at the
`SimpleTag` component used in the Shakespeare renderer for an example.