Trait cssparser::DeclarationParser
[−]
[src]
pub trait DeclarationParser<'i> { type Declaration; type Error: 'i; fn parse_value<'t>(
&mut self,
name: CowRcStr<'i>,
input: &mut Parser<'i, 't>
) -> Result<Self::Declaration, ParseError<'i, Self::Error>>; }
A trait to provide various parsing of declaration values.
For example, there could be different implementations for property declarations in style rules
and for descriptors in @font-face
rules.
Associated Types
type Declaration
The finished representation of a declaration.
type Error: 'i
The error type that is included in the ParseError value that can be returned.
Required Methods
fn parse_value<'t>(
&mut self,
name: CowRcStr<'i>,
input: &mut Parser<'i, 't>
) -> Result<Self::Declaration, ParseError<'i, Self::Error>>
&mut self,
name: CowRcStr<'i>,
input: &mut Parser<'i, 't>
) -> Result<Self::Declaration, ParseError<'i, Self::Error>>
Parse the value of a declaration with the given name
.
Return the finished representation for the declaration
as returned by DeclarationListParser::next
,
or Err(())
to ignore the entire declaration as invalid.
Declaration name matching should be case-insensitive in the ASCII range.
This can be done with std::ascii::Ascii::eq_ignore_ascii_case
,
or with the match_ignore_ascii_case!
macro.
The given input
is a "delimited" parser
that ends wherever the declaration value should end.
(In declaration lists, before the next semicolon or end of the current block.)
If !important
can be used in a given context,
input.try(parse_important).is_ok()
should be used at the end
of the implementation of this method and the result should be part of the return value.