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use crate::{
ast::{self, AttrsOwner, AstNode},
syntax_node::{
SyntaxError,
SyntaxErrorKind::*,
Direction,
},
};
pub(crate) fn validate_match_armlist(node: &ast::MatchArmList, errors: &mut Vec<SyntaxError>) {
// Report errors for any inner attribute
// which has a preceding matcharm or an outer attribute
for inner_attr in node.attrs().filter(|s| s.is_inner()) {
let any_errors = inner_attr.syntax().siblings(Direction::Prev).any(|s| {
match (ast::MatchArm::cast(s), ast::Attr::cast(s)) {
(Some(_), _) => true,
// Outer attributes which preceed an inner attribute are not allowed
(_, Some(a)) if !a.is_inner() => true,
(_, Some(_)) => false,
(None, None) => false,
}
});
if any_errors {
errors.push(SyntaxError::new(InvalidMatchInnerAttr, inner_attr.syntax().range()));
}
}
}
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