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style: Document css(iterable) and css(dimension).

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Emilio Cobos Álvarez 2017-11-12 16:18:15 +01:00
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6
components/style_traits/values.rs
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@ -24,6 +24,12 @@ use std::fmt::{self, Write};
/// 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;
/// * if `#[css(iterable)]` is found on a function variant, that variant needs
/// to have a single member, and that member needs to be iterable. The
/// iterable will be serialized as the arguments for the function.
/// * if `#[css(dimension)]` is found on a variant, that variant needs
/// to have a single member. The variant would be serialized as a CSS
/// dimension token, like: <member><identifier>.
/// * 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 {