Macro gen_static_message 

gen_static_message!() { /* proc-macro */ }

Generates a static message with placeholders for arguments.

This macro creates a StaticMessage that can be used to format strings with a fixed number of arguments. The placeholders in the message are denoted by {0}, {1}, etc., which correspond to the arguments provided during formatting.

Notes

• The number of placeholders in the message must match the number of arguments specified in the StaticMessage type.
• The macro supports using constants within the message string.
• You can include numeric constants directly in the message using the {u:} or {i:} syntax for unsigned and signed integers, respectively.

Examples

use local_fmt::{gen_static_message, StaticMessage};

// Example with argument
{
    const MESSAGE: StaticMessage<1> = gen_static_message!("Hello! {0}");
    let text = MESSAGE.format(&["World!"]);
    assert_eq!(text, "Hello! World!");
}

// Example with const placeholder
{
    const HELLO: &str = "Hello";
    const MESSAGE: StaticMessage<2> = gen_static_message!("{HELLO} {0} World! {1}");
    let text = MESSAGE.format(&["Beautiful", "Rust!"]);
    assert_eq!(text, "Hello Beautiful World! Rust!");
}

// Example with duplicate arguments
{
    const MESSAGE: StaticMessage<1> = gen_static_message!("{0} World! {0}");
    let text = MESSAGE.format(&["Beautiful"]);
    assert_eq!(text, "Beautiful World! Beautiful");
}

// Example with unsigned number
{
    const NUM: usize = 123456789;
    const MESSAGE: StaticMessage<1> = gen_static_message!("Hello! {0} {u:NUM}");
    let text = MESSAGE.format(&["World!"]);
    assert_eq!(text, "Hello! World! 123456789");
}

// Example with signed number
{
    const NUM: i32 = -123456789;
    const MESSAGE: StaticMessage<1> = gen_static_message!("Hello! {0} {i:NUM}");
    let text = MESSAGE.format(&["World!"]);
    assert_eq!(text, "Hello! World! -123456789");
}