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Diffstat (limited to 'crates/syntax/src/lib.rs')
| -rw-r--r-- | crates/syntax/src/lib.rs | 21 |
1 files changed, 10 insertions, 11 deletions
diff --git a/crates/syntax/src/lib.rs b/crates/syntax/src/lib.rs index 3a9ebafe87..b8a8103cc6 100644 --- a/crates/syntax/src/lib.rs +++ b/crates/syntax/src/lib.rs @@ -107,14 +107,22 @@ impl<T> Parse<T> { } impl<T: AstNode> Parse<T> { + /// Converts this parse result into a parse result for an untyped syntax tree. pub fn to_syntax(self) -> Parse<SyntaxNode> { Parse { green: self.green, errors: self.errors, _ty: PhantomData } } + /// Gets the parsed syntax tree as a typed ast node. + /// + /// # Panics + /// + /// Panics if the root node cannot be casted into the typed ast node + /// (e.g. if it's an `ERROR` node). pub fn tree(&self) -> T { T::cast(self.syntax_node()).unwrap() } + /// Converts from `Parse<T>` to [`Result<T, Vec<SyntaxError>>`]. pub fn ok(self) -> Result<T, Vec<SyntaxError>> { match self.errors() { errors if !errors.is_empty() => Err(errors), @@ -177,11 +185,7 @@ impl SourceFile { let root = SyntaxNode::new_root(green.clone()); assert_eq!(root.kind(), SyntaxKind::SOURCE_FILE); - Parse { - green, - errors: if errors.is_empty() { None } else { Some(errors.into()) }, - _ty: PhantomData, - } + Parse::new(green, errors) } } @@ -290,12 +294,7 @@ impl ast::TokenTree { } let (green, errors) = builder.finish_raw(); - - Parse { - green, - errors: if errors.is_empty() { None } else { Some(errors.into()) }, - _ty: PhantomData, - } + Parse::new(green, errors) } } |