Method first_file_namespace

src/util.rs:1666–1672

Return the first namespace declared in a file. For single-namespace files this is the file's namespace. For multi-namespace files this returns the first block's namespace, which may not be correct for all positions in the file. Prefer [`namespace_at_offset`](Self::namespace_at_offset) when a cursor position is available.

(&self, uri: &str)

    /// [`namespace_at_offset`](Self::namespace_at_offset) when a cursor
    /// position is available.
    pub(crate) fn first_file_namespace(&self, uri: &str) -> Option<String> {
        self.file_namespaces
            .read()
            .get(uri)
            .and_then(|spans| spans.first())
            .and_then(|s| s.namespace.clone())
    }

    /// Return the import table (short name → FQN) for a file.
    ///