[FIXED] What does "=>" mean in Rust?

Issue

I am trying to modify the VGA buffer's character. I don't understand the meaning of =>:

b'\n' => self.new_line()

Solution

The context matters. I imagine this is probably from the middle of a match statement like this:

match foo {
    b'\n' => self.new_line(),
    // If foo is any other byte, do nothing (empty code block).
    _ => {}
}

In this case, b'\n' => self.new_line() roughly means "If the thing I am trying to match is the byte for a new line, call self.new_line()".

match a {
    // If a matches b do c, otherwise try next case
    b => c,
    // etc.
}

In C this would probably look a bit more like this:

switch (foo) {
    case '\n':
        new_line(self);
        break;
    // etc.
}

Answered By - Locke

Answer Checked By - Senaida (PHPFixing Volunteer)