This is 'lgbt.py', a Literal General Brainfuck Transpiler that converts Brainfuck to various languages.

I want to clarify that, just because the name is LGBT, there might be misunderstandings, so I'm sexually normal. Alan Turing, who died young, was homosexual.

I believe it can convert to languages ​​that jump to any label (for example, assembly language) and almost any language with a while loop. It probably won't work for languages ​​that use line numbers to indicate jump destinations, like early BASIC, but it can still convert if there's a while loop or label jumps.

The source code of the conversion result is output to standard output, so please redirect it using lgbt.py file.bf>filename.ext.

Generally, transpiling from a high-level language to a lower-level language is difficult, but transpiling from a lower-level language to a higher-level language is easy if you allow for some redundancy. Brainfuck is the lowest-level language, so it can be converted to almost any language. Furthermore, since it is Turing complete, it possesses computational versatility, and almost everything except special operations can be written in Brainfuck. Though it's not very practical.

Automatic indentation is also handled, making conversion to Python possible. Even if a single Brainfuck instruction spans multiple lines in the target language, it can be written as a JSON list.

In the target strings of the map file, openlabel and closelabel are replaced with the labels immediately before and after the corresponding [']' and `']' positions, respectively.

By default, lgbt.py converts BF sources to pseudo-assembly code. Specify the language to convert to using the map file, which will be discussed later.

Headers and footers will be necessary to run it in the target language system. Header, footer, and map files for C, Python, Ruby, assembly, and x86_64 FreeBSD are included.

The number and interpretation of command-line arguments are as follows:

Number of arguments Interpretation
1 <file.bf>
2 <mapfile> <file.bf>
3 <mapfile> <headerfile> <file.bf>
4 <mapfile> <headerfile> <file.bf> <tailfile>

Map file:map.c.json

Header:header.c

Tailor:tailor.c

lgbt.py map.c.json header.c mandelbrot.bf tailor.c>out.c # Convert to C
cc out.c # Compile
a.out # Execution

Map file:map.py.json

Header file:header.py

Tailor file:nothing

lgbt.py map.py.json header.py hello.bf > hello.py
python hello.py

Map file:map.rb.json

Header file:header.rb

Tailor file:nothing

lgbt.py map.rb.json header.rb hello.bf > hello.rb
ruby hello.rb

header:header.lisp

tailor:tailor.lisp

map:map.lisp.json

lgbt.py map.lisp.json header.lisp hello.bf tailor.lisp > hello.lisp
sbcl --script hello.lisp

installation of sbcl required.

header:header.pl

tailor:tailor.pl

map:map.pl.json

lgbt.py map.pl.json header.pl hello.pl tailor.pl >hello.pl
swipl hello.pl

installation of swi-prolog required.

lgbt.py map.amd64.json header.s hello.bf tailor.s > hello.s # Transform
as hello.s -o hello.o # Assemble
ld hello.o -o hello # Link
./hello # Execute

lgbt.py map.aarch64.json header.aarch64.s mandelbrot.bf tailor.aarch64.s > mandelbrot.aarch64.s
llvm-mc -triple=aarch64-unknown-freebsd -filetype=obj mandelbrot.aarch64.s -o mandelbrot.aarch64.o

By applying this, I think it can be used in a wide range of languages.

Ook and other languages ​​are also supported.