Macro gen_alloc_message 

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

Generates an allocatable message with placeholders for arguments.

This macro creates an AllocMessage 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 AllocMessage type.
• The macro supports using ident within the message string.

Examples

use local_fmt::{gen_alloc_message, AllocMessage};

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

// Example with string placeholder
{
    let hello: String = "Hello".to_string();
    let message: AllocMessage<2> = gen_alloc_message!("{hello} {0} World! {1}");
    let text = message.format(&["Beautiful", "Rust!"]);
    assert_eq!(text, "Hello Beautiful World! Rust!");
}

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