Macro text 

macro_rules! text {
    () => { ... };
    ($($rest:tt)*) => { ... };
}

Macro to declare a list of text segments. A segment can be written as

• "text" (a string literal)
• {expr} (an expression that evaluates to a string slice)

Each segment can be preceded by one of

• c:, where c is a Style variant; the segment is styled if supported, otherwise it is wrapped in backticks
• c!, where c is a Style variant; the segment is styled if supported, otherwise no formatting is applied

Each color style can be abbreviated with its first letter (cyan ➔ c, green ➔ g, magenta ➔ m, red ➔ r, yellow ➔ y); use an uppercase letter to make it bold (bold cyan ➔ C, etc.). The Underline and UnderlineBold styles are abbreviated as u and U, respectively.

Segments are not separated with commas, for example:

// "warning" is yellow and bold, "world" is cyan, or wrapped in backticks
let _segments = text!(Y!"warning" ": hello" c:"world");

// the value of an build-time environment variable is printed in magenta
let _segments = text!("version is " m!{env!("CARGO_PKG_VERSION")});