A scheme implementation by c++.

I refer Anthony C. Hay's code.
[Lisp interpreter in 90 lines of C++] (http://howtowriteaprogram.blogspot.tw/2010/11/lisp-interpreter-in-90-lines-of-c.html)

It looks like sicp 4.1.1 ~ 4.1.4 example. [Metacircular Evaluator (sections 4.1.1-4.1.4)] (http://mitpress.mit.edu/sicp/code/index.html)

environment relative function:

• extend_environment
• create_primitive_procedure
• set_variable
• set_variable_value // set!
• lookup_variable_value
• print_env_content

simple scheme has bare-metal version, support:

• stm32f4discovery
• p103 qemu
• rpi2

compile step: p103:
cd p103
./ln.sh
make

you can use p103 qemu to run it
(https://github.com/beckus/qemu_stm32.git)
qemu_stm32/arm-softmmu/qemu-system-arm -M stm32-p103 -kernel mymain.bin -nographic
qemu_stm32/arm-softmmu/qemu-system-arm -M stm32-p103 -kernel mymain.bin -display sdl [demo video] (https://youtu.be/P7K5zxa5MlE)

On linux, you can compile by make RL=1 for readline version.