Conventions used

There are a number of text conventions used throughout this book.

CodeInText: Indicates code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles. Here is an example: "Mount the downloaded WebStorm-10*.dmg disk image file as another disk in your system."

A block of code is set as follows:

macro_rules! strange_patterns {
    (The pattern must match precisely) => { "Text" };
    (42) => { "Numeric" };
    (;<=,<=;) => { "Alpha" };
}

When we wish to draw your attention to a particular part of a code block, the relevant lines or items are set in bold:

#[test]
#[should_panic]
fn test_failing_make_fn() {
    make_fn!(fail, {assert!(false)});
    fail();
 } 

Any command-line input or output is written as follows:

$ cargo run

Bold: Indicates a new term, an important word, or words that you see on screen. For example, words in menus or dialog boxes appear in the text like this. Here is an example: "Select System info from the Administration panel."