E119: There is no main function

A program has to say where it starts. In Turf that is a function called main that returns an int:

fn main(): int {    return 0;}

Turf found no such function in the file you compiled, so it has nothing to run.

Usual causes:

• The function is missing, or misspelled (Main, mian). The name is case sensitive.
• It isn’t the file you meant to compile. A project’s entry point is src/main.tr.
• The file is a module – a library of functions that other files import – and was never meant to run on its own. A module doesn’t need a main. To check one without running it: turf check --module file.tr.

The number main returns is the program’s exit status; 0 means success.

Run turf --explain E119 in a terminal to read this again.