Function concat_panic

pub const fn concat_panic(args: &[&[PanicVal<'_>]]) -> !

Panics by concatenating the argument slice.

This is the function that the concat_panic macro calls to panic.

Example

Here’s how to panic with formatting without using any macros:

use const_panic::{FmtArg, PanicVal, concat_panic};

const _: () = concat_panic(&[&[
    PanicVal::write_str("\nthe error was "),
    PanicVal::from_u8(100, FmtArg::DISPLAY),
    PanicVal::write_str(" and "),
    PanicVal::from_str("\nHello\tworld", FmtArg::DEBUG),
]]);

That fails to compile with this error message:

error[E0080]: evaluation of constant value failed
  --> src/concat_panic_.rs:13:15
   |
6  |   const _: () = concat_panic(&[&[
   |  _______________^
7  | |     PanicVal::write_str("\nthe error was "),
8  | |     PanicVal::from_u8(100, FmtArg::DISPLAY),
9  | |     PanicVal::write_str(" and "),
10 | |     PanicVal::from_str("\nHello\tworld", FmtArg::DEBUG),
11 | | ]]);
   | |___^ the evaluated program panicked at '
the error was 100 and "\nHello\tworld"', src/concat_panic_.rs:6:15