<h3>A first program</h3> <p>The <code>main</code> function in toc corresponds to the <code>main</code> function in C. This function is called when your program is run. So, this is a valid toc program which does nothing:</p> <p><code> main ::= fn() { }; </code></p> <p>It declares a constant, <code>main</code>, 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 <code>fn main() { ... }</code>).</p> <p>Assuming you have compiled the compiler (see <code>README.md</code> for instructions about that), you can compile it with</p> <p><code> toc <your filename> </code></p> <p>You will get a file called <code>out.c</code>, 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.</p>