gust-render 0.2.0

Gust is a simple 2D graphical library inspired by SFML.
Documentation 
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//
//  Rust file | 2018
//  Author: Alexandre Fourcat
//  gl_error.rs
//  module:
//! gl error system

use gl;
use std::error::Error;

#[derive(Debug)]
pub enum GlError {
    NoError,
    InvalidEnum,
    InvalidValue,
    InvalidOperation,
    InvalidFramebufferOperation,
    OutOfMemory,
}

impl GlError {
    pub fn new() -> Result<(), GlError> {
        unsafe {
            match gl::GetError() {
                gl::NO_ERROR => Ok(()),
                gl::INVALID_ENUM => Err(GlError::InvalidEnum),
                gl::INVALID_VALUE => Err(GlError::InvalidValue),
                gl::INVALID_OPERATION => Err(GlError::InvalidOperation),
                gl::INVALID_FRAMEBUFFER_OPERATION => Err(GlError::InvalidFramebufferOperation),
                gl::OUT_OF_MEMORY => Err(GlError::OutOfMemory),
                _ => Ok(()),
            }
        }
    }
}

impl Error for GlError {
    fn cause(&self) -> Option<&Error> {
        None
    }
}

use std::fmt;

impl fmt::Display for GlError {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        match self {
            GlError::NoError => write!(f, "No Error"),
            GlError::InvalidEnum => write!(f, "Bad enum argument"),
            GlError::InvalidValue => write!(f, "Bad value argument"),
            GlError::InvalidOperation => write!(f, "Bad operation"),
            GlError::InvalidFramebufferOperation => write!(f, "Bad framebuffer operation"),
            GlError::OutOfMemory => write!(f, "No more gl memory"),
        }
    }
}