Method reserve_exact

crates/core/src/alloc/string.rs:174–178

(&mut self, additional: usize)

    /// allocation failure.
    #[inline]
    pub fn reserve_exact(&mut self, additional: usize) -> Result<(), OutOfMemory> {
        self.inner
            .try_reserve_exact(additional)
            .map_err(|_| OutOfMemory::new(self.len().saturating_add(additional)))
    }

    /// Same as [`std::string::String::push`] but returns an error on allocation
    /// failure.