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|
mod builder;
mod syntax_text;
use self::syntax_text::SyntaxText;
use crate::{SmolStr, SyntaxKind, TextRange, TextUnit};
use rowan::Types;
use std::{
fmt,
hash::{Hash, Hasher},
};
pub(crate) use self::builder::GreenBuilder;
pub use rowan::{TreeRoot, WalkEvent};
#[derive(Debug, Clone, Copy)]
pub enum RaTypes {}
impl Types for RaTypes {
type Kind = SyntaxKind;
type RootData = Vec<SyntaxError>;
}
pub type OwnedRoot = ::rowan::OwnedRoot<RaTypes>;
pub type RefRoot<'a> = ::rowan::RefRoot<'a, RaTypes>;
pub type GreenNode = ::rowan::GreenNode<RaTypes>;
#[derive(Debug, Clone, PartialEq, Eq, Hash, Ord, PartialOrd)]
pub struct SyntaxError {
pub msg: String,
pub offset: TextUnit,
}
#[derive(Clone, Copy)]
pub struct SyntaxNode<R: TreeRoot<RaTypes> = OwnedRoot>(::rowan::SyntaxNode<RaTypes, R>);
pub type SyntaxNodeRef<'a> = SyntaxNode<RefRoot<'a>>;
impl<R1, R2> PartialEq<SyntaxNode<R1>> for SyntaxNode<R2>
where
R1: TreeRoot<RaTypes>,
R2: TreeRoot<RaTypes>,
{
fn eq(&self, other: &SyntaxNode<R1>) -> bool {
self.0 == other.0
}
}
impl<R: TreeRoot<RaTypes>> Eq for SyntaxNode<R> {}
impl<R: TreeRoot<RaTypes>> Hash for SyntaxNode<R> {
fn hash<H: Hasher>(&self, state: &mut H) {
self.0.hash(state)
}
}
impl SyntaxNode {
pub(crate) fn new(green: GreenNode, errors: Vec<SyntaxError>) -> SyntaxNode {
SyntaxNode(::rowan::SyntaxNode::new(green, errors))
}
}
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum Direction {
Next,
Prev,
}
impl<'a> SyntaxNodeRef<'a> {
pub fn leaf_text(self) -> Option<&'a SmolStr> {
self.0.leaf_text()
}
pub fn ancestors(self) -> impl Iterator<Item = SyntaxNodeRef<'a>> {
crate::algo::generate(Some(self), |&node| node.parent())
}
pub fn descendants(self) -> impl Iterator<Item = SyntaxNodeRef<'a>> {
self.preorder().filter_map(|event| match event {
WalkEvent::Enter(node) => Some(node),
WalkEvent::Leave(_) => None,
})
}
pub fn siblings(self, direction: Direction) -> impl Iterator<Item = SyntaxNodeRef<'a>> {
crate::algo::generate(Some(self), move |&node| match direction {
Direction::Next => node.next_sibling(),
Direction::Prev => node.prev_sibling(),
})
}
pub fn preorder(self) -> impl Iterator<Item = WalkEvent<SyntaxNodeRef<'a>>> {
self.0.preorder().map(|event| match event {
WalkEvent::Enter(n) => WalkEvent::Enter(SyntaxNode(n)),
WalkEvent::Leave(n) => WalkEvent::Leave(SyntaxNode(n)),
})
}
}
impl<R: TreeRoot<RaTypes>> SyntaxNode<R> {
pub(crate) fn root_data(&self) -> &Vec<SyntaxError> {
self.0.root_data()
}
pub(crate) fn replace_with(&self, replacement: GreenNode) -> GreenNode {
self.0.replace_with(replacement)
}
pub fn borrowed<'a>(&'a self) -> SyntaxNode<RefRoot<'a>> {
SyntaxNode(self.0.borrowed())
}
pub fn owned(&self) -> SyntaxNode<OwnedRoot> {
SyntaxNode(self.0.owned())
}
pub fn kind(&self) -> SyntaxKind {
self.0.kind()
}
pub fn range(&self) -> TextRange {
self.0.range()
}
pub fn text(&self) -> SyntaxText {
SyntaxText::new(self.borrowed())
}
pub fn is_leaf(&self) -> bool {
self.0.is_leaf()
}
pub fn parent(&self) -> Option<SyntaxNode<R>> {
self.0.parent().map(SyntaxNode)
}
pub fn first_child(&self) -> Option<SyntaxNode<R>> {
self.0.first_child().map(SyntaxNode)
}
pub fn last_child(&self) -> Option<SyntaxNode<R>> {
self.0.last_child().map(SyntaxNode)
}
pub fn next_sibling(&self) -> Option<SyntaxNode<R>> {
self.0.next_sibling().map(SyntaxNode)
}
pub fn prev_sibling(&self) -> Option<SyntaxNode<R>> {
self.0.prev_sibling().map(SyntaxNode)
}
pub fn children(&self) -> SyntaxNodeChildren<R> {
SyntaxNodeChildren(self.0.children())
}
}
impl<R: TreeRoot<RaTypes>> fmt::Debug for SyntaxNode<R> {
fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
write!(fmt, "{:?}@{:?}", self.kind(), self.range())?;
if has_short_text(self.kind()) {
write!(fmt, " \"{}\"", self.text())?;
}
Ok(())
}
}
#[derive(Debug)]
pub struct SyntaxNodeChildren<R: TreeRoot<RaTypes>>(::rowan::SyntaxNodeChildren<RaTypes, R>);
impl<R: TreeRoot<RaTypes>> Iterator for SyntaxNodeChildren<R> {
type Item = SyntaxNode<R>;
fn next(&mut self) -> Option<SyntaxNode<R>> {
self.0.next().map(SyntaxNode)
}
}
fn has_short_text(kind: SyntaxKind) -> bool {
use crate::SyntaxKind::*;
match kind {
IDENT | LIFETIME | INT_NUMBER | FLOAT_NUMBER => true,
_ => false,
}
}
|
