Program valid in Rust, Ruby, Python, C, C++, Brainfuck, and POSIX Shell

multi-language code

#/*[/**/include <stdio.h>
#define print(_) int main() { if (sizeof('a') > 1) { printf("Hello from C\n"); } else { printf("Hello from C++\n"); } }
#define X */[allow()] macro_rules! p { ($($t:tt)*) => (fn main() { println!("Hello from Rust") }) } p! {
""":"
false || "exec" "echo" "Hello from sh"
" """
print((0 and "Hello from Ruby\n" or "Hello from Python"))
#define Y }/*
#define A ]-[------->+<]>-.-[->+++++<]>++.+++++++..+++.[--->+<]>-----.++[->+++<]>.++++++++++++.---.--.[->+++++<]>-.[->+++<]>++.[--->+<]>----.+++[->+++<]>++.++++++++.+++++.--------.-[--->+<]>--.+[->+++<]>+.++++++++.+[++>---<]>-.*/

From https://www.reddit.com/r/rust/comments/4ume9f/source_file_that_is_both_valid_rust_and_valid_ruby/d5ta3lk