A first program

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The main function in toc corresponds to the main function in C. This function is called when your program is run. So, this is a valid toc program which does nothing:

main ::= fn() {
}

It declares a constant, main, which is a function with an empty body. Note that the syntax for declaring functions is the same as the syntax for declaring constants (it isn't something like fn main() { ... }).

Note that you do not need a semicolon at the end of this declaration (for convenience, if a declaration ends with a closing brace (}), you do not need a semicolon).

Assuming you have compiled the compiler (see README.md for instructions about that), you can compile it with

toc <your filename>

You will get a file called out.c, which you can then put through your C compiler to get an executable file which does nothing. Congratulations! You've written your first toc program.