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use rowan::GreenNodeBuilder;
use {
parser_impl::Sink,
yellow::{GreenNode, SyntaxError, RaTypes},
SyntaxKind, TextRange, TextUnit,
};
pub(crate) struct GreenBuilder<'a> {
text: &'a str,
pos: TextUnit,
errors: Vec<SyntaxError>,
inner: GreenNodeBuilder<RaTypes>,
}
impl<'a> Sink<'a> for GreenBuilder<'a> {
type Tree = (GreenNode, Vec<SyntaxError>);
fn new(text: &'a str) -> Self {
GreenBuilder {
text,
pos: 0.into(),
errors: Vec::new(),
inner: GreenNodeBuilder::new(),
}
}
fn leaf(&mut self, kind: SyntaxKind, len: TextUnit) {
let range = TextRange::offset_len(self.pos, len);
self.pos += len;
let text = self.text[range].into();
self.inner.leaf(kind, text);
}
fn start_internal(&mut self, kind: SyntaxKind) {
self.inner.start_internal(kind)
}
fn finish_internal(&mut self) {
self.inner.finish_internal();
}
fn error(&mut self, message: String) {
self.errors.push(SyntaxError {
msg: message,
offset: self.pos,
})
}
fn finish(self) -> (GreenNode, Vec<SyntaxError>) {
(self.inner.finish(), self.errors)
}
}
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