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Prefer Either<A, B> for LengthOrNumber

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This commit is contained in:
Ravi Shankar 2016-11-17 20:16:34 +05:30
parent 73eabad1c2
commit 6ac3fcbfeb
4 changed files with 20 additions and 110 deletions
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38
components/style/values/specified/length.rs
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@ -1008,40 +1008,4 @@ impl Parse for LengthOrPercentageOrAutoOrContent {
}
}
#[derive(Debug, Clone, PartialEq)]
#[cfg_attr(feature = "servo", derive(HeapSizeOf))]
pub enum LengthOrNumber {
Length(Length),
Number(Number),
}
impl HasViewportPercentage for LengthOrNumber {
fn has_viewport_percentage(&self) -> bool {
match *self {
LengthOrNumber::Length(length) => length.has_viewport_percentage(),
_ => false
}
}
}
impl ToCss for LengthOrNumber {
fn to_css<W>(&self, dest: &mut W) -> fmt::Result where W: fmt::Write {
match *self {
LengthOrNumber::Length(len) => len.to_css(dest),
LengthOrNumber::Number(number) => number.to_css(dest),
}
}
}
impl Parse for LengthOrNumber {
fn parse(input: &mut Parser) -> Result<Self, ()> {
let length = input.try(Length::parse);
if let Ok(len) = length {
return Ok(LengthOrNumber::Length(len));
}
let num = try!(Number::parse_non_negative(input));
Ok(LengthOrNumber::Number(num))
}
}
pub type LengthOrNumber = Either<Length, Number>;