Merge pull request #764 from AndyGauge/doc-error

//! Errors returned by OpenSSL library.

//!

//! OpenSSL errors are stored in an `ErrorStack`.  Most methods in the crate

//! returns a `Result<T, ErrorStack>` type.

//!

//! # Examples

//!

//! ```

//! use openssl::error::ErrorStack;

//! use openssl::bn::BigNum;

//!

//! let an_error = BigNum::from_dec_str("Cannot parse letters");

//! match an_error {

//!     Ok(_)  => (),

//!     Err(e) => println!("Parsing Error: {:?}", e),

//! }

//! ```

use libc::{c_ulong, c_char, c_int};

use std::fmt;

use std::error;

use ffi;

/// Collection of [`Error`]s from OpenSSL.

///

/// [`Error`]: struct.Error.html

#[derive(Debug, Clone)]

pub struct ErrorStack(Vec<Error>);