servo/components/style/values/specified/column.rs
author Emilio Cobos Álvarez <emilio@crisal.io>
Sat, 10 Nov 2018 21:20:27 +0100
changeset 445809 8f4a9b61793ae1fed7ea246c42abc3df1cb8b1d8
parent 445806 f3d03eaccc5862b764f0850170a875b036848c4f
child 449217 2392d8199cd01b4b0923007088b7cd55e1edc353
permissions -rw-r--r--
Bug 1506391 - Revert try -> r#try change. Since we're in an inconsistent state because mako files weren't updated, and it's really ugly.

/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

//! Specified types for the column properties.

use crate::parser::{Parse, ParserContext};
use crate::values::generics::column::ColumnCount as GenericColumnCount;
use crate::values::specified::PositiveInteger;
use cssparser::Parser;
use style_traits::ParseError;

/// A specified type for `column-count` values.
pub type ColumnCount = GenericColumnCount<PositiveInteger>;

impl Parse for ColumnCount {
    fn parse<'i, 't>(
        context: &ParserContext,
        input: &mut Parser<'i, 't>,
    ) -> Result<Self, ParseError<'i>> {
        if input.try(|i| i.expect_ident_matching("auto")).is_ok() {
            return Ok(GenericColumnCount::Auto);
        }
        Ok(GenericColumnCount::Integer(PositiveInteger::parse(
            context, input,
        )?))
    }
}