Method literal_or_identifier

codegraph-kernel/src/rlang.rs:278–293

literalOrIdentifier (r.ts:70-81): identifier text (backticks kept), a string's first string_content text, `Some("")` for an empty string literal (falsy downstream, like null), None otherwise.

(&self, node: Option<Node<'t>>)

    /// string's first string_content text, `Some("")` for an empty string
    /// literal (falsy downstream, like null), None otherwise.
    fn literal_or_identifier(&self, node: Option<Node<'t>>) -> Option<&'t str> {
        let node = node?;
        match node.kind() {
            "identifier" => Some(self.text(node)),
            "string" => {
                let mut cursor = node.walk();
                for c in node.named_children(&mut cursor) {
                    if c.kind() == "string_content" {
                        return Some(self.text(c));
                    }
                }
                Some("")
            }
            _ => None,
        }
    }

    // --- the visitNode walk (tree-sitter.ts:936-953, 1248, 1295-1301) -----
    // Hook first (consumed → return; scanFnRefSubtree is a no-op for R), then