Macro format_cstring 

macro_rules! format_cstring {
    ($($args:tt)*) => { ... };
}

Available on crate feature alloc only.

Convenience macro to create a \0-byte terminated alloc::ffi::CString from a format string

This macro requires the alloc feature. In allocation-free builds, use valgrind_print instead.

The format string passed to this macro must not contain or end with a \0-byte.

Safety

The same safety conditions as to the cstring macro apply here