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Add a generate_element_with_only_attributes macro, and use it wherever it makes sense.

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This commit is contained in:
Emmanuel Gil Peyrot 2017-10-31 17:58:11 +00:00
commit 929bd577f3
10 changed files with 92 additions and 365 deletions
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40
src/lib.rs
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@ -203,6 +203,46 @@ macro_rules! generate_empty_element {
);
}
macro_rules! generate_element_with_only_attributes {
($elem:ident, $name:tt, $ns:expr, [$($attr:ident: $attr_type:ty = $attr_name:tt => $attr_action:tt),+,]) => (
generate_element_with_only_attributes!($elem, $name, $ns, [$($attr: $attr_type = $attr_name => $attr_action),*]);
);
($elem:ident, $name:tt, $ns:expr, [$($attr:ident: $attr_type:ty = $attr_name:tt => $attr_action:tt),+]) => (
#[derive(Debug, Clone)]
pub struct $elem {
$(
pub $attr: $attr_type
),*
}
impl TryFrom<Element> for $elem {
type Err = Error;
fn try_from(elem: Element) -> Result<$elem, Error> {
check_self!(elem, $name, $ns);
check_no_children!(elem, $name);
check_no_unknown_attributes!(elem, $name, [$($attr_name),*]);
Ok($elem {
$(
$attr: get_attr!(elem, $attr_name, $attr_action)
),*
})
}
}
impl From<$elem> for Element {
fn from(elem: $elem) -> Element {
Element::builder($name)
.ns($ns)
$(
.attr($attr_name, elem.$attr)
)*
.build()
}
}
);
}
macro_rules! generate_id {
($elem:ident) => (
#[derive(Debug, Clone, PartialEq, Eq, Hash)]