Method reserve

crates/core/src/alloc/string.rs:165–169

(&mut self, additional: usize)

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

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