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Document how style traits can be derived

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Anthony Ramine 2017-08-28 09:37:25 +02:00
parent 41c3be54ea
commit ba4136b5a8
4 changed files with 44 additions and 3 deletions
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8
components/style_traits/values.rs
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@ -18,8 +18,12 @@ use std::fmt::{self, Write};
/// of their name;
/// * unit variants whose name starts with "Moz" or "Webkit" are prepended
/// with a "-";
/// * variants with fields get serialised as the space-separated serialisations
/// of their fields.
/// * if `#[css(comma)]` is found on a variant, its fields are separated by
/// commas, otherwise, by spaces;
/// * if `#[css(function)]` is found on a variant, the variant name gets
/// serialised like unit variants and its fields are surrounded by parentheses;
/// * finally, one can put `#[css(derive_debug)]` on the whole type, to
/// implement `Debug` by a single call to `ToCss::to_css`.
pub trait ToCss {
/// Serialize `self` in CSS syntax, writing to `dest`.
fn to_css<W>(&self, dest: &mut W) -> fmt::Result where W: Write;