Vec::with_capacity(capacity) panics / aborts when the capacity is too large.

This is a safer alternative which reports Error using tryreserveexact

``` //let's pretend this is an arbitrary number read from a broken file let numberfromfile : usize = 100000000000000;

//try to create a 100TB Vec let result : Result, > = vecwithcapacitysafe(numberfromfile);

//An error is reported assert!(result.iserr()); ``` vecintorawparts decomposes Vec into ts raw components.

Minimum Supported Version of Rust

1.57.0(stable)

changelog

0.4.2 TryReserve is stabilized at Rust 1.57.0

0.3.0 - removed WcsErrorType * Breaking Change * - changed WcsError to enum again. * Breaking Change * - added tryreserveerror() method to WcsError

0.2.0

• Added some documentations.
• Changed implementation to tryreserveexact(), just in case.
• Removed WcsError::new ** breaking change *