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// This file is part of caniuse-serde. 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/caniuse-serde/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 caniuse-serde. See the COPYRIGHT file in the top-level directory of this distribution and at https://raw.githubusercontent.com/lemonrock/caniuse-serde/master/COPYRIGHT.
struct PrefixVisitor;
impl<'de> Visitor<'de> for PrefixVisitor
{
type Value = Option<Prefix>;
fn expecting(&self, formatter: &mut Formatter) -> fmt::Result
{
formatter.write_str("a vendor prefix without leading or trailing hyphens")
}
fn visit_str<E: de::Error>(self, v: &str) -> Result<Self::Value, E>
{
use self::Prefix::*;
let result = match v
{
"" => None,
"o" => Some(o),
"moz" => Some(moz),
"webkit" => Some(webkit),
"ms" => Some(ms),
_ => Some(Unknown(v.to_owned())),
};
Ok(result)
}
fn visit_string<E: de::Error>(self, v: String) -> Result<Self::Value, E>
{
use self::Prefix::*;
let result = match &v[..]
{
"" => None,
"o" => Some(o),
"moz" => Some(moz),
"webkit" => Some(webkit),
"ms" => Some(ms),
_ => Some(Unknown(v.to_owned())),
};
Ok(result)
}
}