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use std::{collections::BTreeSet, fmt::Write};
use {SyntaxError, SyntaxNode, SyntaxNodeRef};
/// Parse a file and create a string representation of the resulting parse tree.
pub fn dump_tree(syntax: &SyntaxNode) -> String {
let syntax = syntax.as_ref();
let mut errors: BTreeSet<_> = syntax.root.errors.iter().cloned().collect();
let mut result = String::new();
go(syntax, &mut result, 0, &mut errors);
return result;
fn go(
node: SyntaxNodeRef,
buff: &mut String,
level: usize,
errors: &mut BTreeSet<SyntaxError>,
) {
buff.push_str(&String::from(" ").repeat(level));
write!(buff, "{:?}\n", node).unwrap();
let my_errors: Vec<_> = errors
.iter()
.filter(|e| e.offset == node.range().start())
.cloned()
.collect();
for err in my_errors {
errors.remove(&err);
buff.push_str(&String::from(" ").repeat(level));
write!(buff, "err: `{}`\n", err.message).unwrap();
}
for child in node.children() {
go(child, buff, level + 1, errors)
}
let my_errors: Vec<_> = errors
.iter()
.filter(|e| e.offset == node.range().end())
.cloned()
.collect();
for err in my_errors {
errors.remove(&err);
buff.push_str(&String::from(" ").repeat(level));
write!(buff, "err: `{}`\n", err.message).unwrap();
}
}
}
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