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lib: Add check macros, to simplify code.

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This commit is contained in:
Emmanuel Gil Peyrot 2017-10-10 17:52:14 +01:00
parent 33018a5c09
commit 6add31b526
1 changed files with 34 additions and 0 deletions
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34
src/lib.rs
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@ -125,6 +125,40 @@ macro_rules! generate_attribute {
);
}
macro_rules! check_self {
($elem:ident, $name:tt, $ns:expr) => (
if !$elem.is($name, $ns) {
return Err(Error::ParseError(concat!("This is not a ", $name, " element.")));
}
);
($elem:ident, $name:tt, $ns:expr, $pretty_name:tt) => (
if !$elem.is($name, $ns) {
return Err(Error::ParseError(concat!("This is not a ", $pretty_name, " element.")));
}
);
}
macro_rules! check_no_children {
($elem:ident, $name:tt) => (
for _ in $elem.children() {
return Err(Error::ParseError(concat!("Unknown child in ", $name, " element.")));
}
);
}
macro_rules! check_no_unknown_attributes {
($elem:ident, $name:tt, [$($attr:tt),*]) => (
for (_attr, _) in $elem.attrs() {
$(
if _attr == $attr {
continue;
}
)*
return Err(Error::ParseError(concat!("Unknown attribute in ", $name, " element.")));
}
);
}
macro_rules! generate_id {
($elem:ident) => (
#[derive(Debug, Clone, PartialEq, Eq, Hash)]