1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44

// This file is part of css. It is subject to the license terms in the COPYRIGHT file found in the top-level directory of this distribution and at https://raw.githubusercontent.com/lemonrock/css/master/COPYRIGHT. No part of predicator, including this file, may be copied, modified, propagated, or distributed except according to the terms contained in the COPYRIGHT file.
// Copyright © 2017 The developers of css. See the COPYRIGHT file in the top-level directory of this distribution and at https://raw.githubusercontent.com/lemonrock/css/master/COPYRIGHT.


#[derive(Debug, Copy, Clone, Ord, PartialOrd, Eq, PartialEq, Hash)]
pub enum CssNumberConversionError
{
	InfinityIsNotAllowed,
	NotANumberIsNotAllowed,
	NegativeNumberMayNotBeAllowed,
	FloatingPointNumberMayNotBeAllowed,
}

impl Display for CssNumberConversionError
{
	#[inline(always)]
	fn fmt(&self, f: &mut Formatter) -> fmt::Result
	{
		f.write_str(self.description())
	}
}

impl Error for CssNumberConversionError
{
	#[inline(always)]
	fn description(&self) -> &str
	{
		use self::CssNumberConversionError::*;
		
		match *self
		{
			InfinityIsNotAllowed => "infinity is not a valid CSS number",
			NotANumberIsNotAllowed => "not a number (NaN) is not a valid CSS number",
			NegativeNumberMayNotBeAllowed => "negative numbers are not valid for a CSS number",
			FloatingPointNumberMayNotBeAllowed => "floating point numbers are not valid for a CSS integer",
		}
	}
	
	#[inline(always)]
	fn cause(&self) -> Option<&Error>
	{
		None
	}
}