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mod generated;
use std::sync::Arc;
use smol_str::SmolStr;
use {
SyntaxNode, SyntaxRoot, TreeRoot, SyntaxError,
SyntaxKind::*,
};
pub use self::generated::*;
pub trait AstNode<R: TreeRoot> {
fn cast(syntax: SyntaxNode<R>) -> Option<Self>
where Self: Sized;
fn syntax(&self) -> &SyntaxNode<R>;
}
pub trait NameOwner<R: TreeRoot>: AstNode<R> {
fn name(&self) -> Option<Name<R>> {
self.syntax()
.children()
.filter_map(Name::cast)
.next()
}
}
impl File<Arc<SyntaxRoot>> {
pub fn parse(text: &str) -> Self {
File::cast(::parse(text)).unwrap()
}
}
impl<R: TreeRoot> File<R> {
pub fn errors(&self) -> Vec<SyntaxError> {
self.syntax().root.errors.clone()
}
}
impl<R: TreeRoot> FnDef<R> {
pub fn has_atom_attr(&self, atom: &str) -> bool {
self.syntax()
.children()
.filter(|node| node.kind() == ATTR)
.any(|attr| {
let mut metas = attr.children().filter(|node| node.kind() == META_ITEM);
let meta = match metas.next() {
None => return false,
Some(meta) => {
if metas.next().is_some() {
return false;
}
meta
}
};
let mut children = meta.children();
match children.next() {
None => false,
Some(child) => {
if children.next().is_some() {
return false;
}
child.kind() == IDENT && child.text() == atom
}
}
})
}
}
impl<R: TreeRoot> Name<R> {
pub fn text(&self) -> SmolStr {
let ident = self.syntax().first_child()
.unwrap();
ident.leaf_text().unwrap()
}
}
impl<R: TreeRoot> NameRef<R> {
pub fn text(&self) -> SmolStr {
let ident = self.syntax().first_child()
.unwrap();
ident.leaf_text().unwrap()
}
}
impl <R: TreeRoot> ImplItem<R> {
pub fn target_type(&self) -> Option<TypeRef<R>> {
match self.target() {
(Some(t), None) | (_, Some(t)) => Some(t),
_ => None,
}
}
pub fn target_trait(&self) -> Option<TypeRef<R>> {
match self.target() {
(Some(t), Some(_)) => Some(t),
_ => None,
}
}
fn target(&self) -> (Option<TypeRef<R>>, Option<TypeRef<R>>) {
let mut types = self.syntax().children().filter_map(TypeRef::cast);
let first = types.next();
let second = types.next();
(first, second)
}
}
|
