fluidattacks-blends-domain 0.6.1

Blends functional core: pure AST graph to syntax graph (no_std)
Documentation 
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use alloc::borrow::ToOwned;

use crate::query::{adj_ast, label_text};
use crate::syntax::builders::unary_expression::build_unary_expression_node;
use crate::syntax::{SyntaxGraphArgs, SyntaxGraphError};
use crate::NodeId;

pub fn reader(
    args: &mut SyntaxGraphArgs<'_>,
    n_id: NodeId,
) -> Result<Option<NodeId>, SyntaxGraphError> {
    let graph = args.ast_graph;
    let c_ids = adj_ast(graph, n_id, None, &[]);
    let val_id = c_ids
        .first()
        .copied()
        .ok_or(SyntaxGraphError::UnexpectedAstShape)?;
    let operator = c_ids
        .get(1)
        .and_then(|id| label_text(graph, *id))
        .map(ToOwned::to_owned)
        .unwrap_or_default();
    build_unary_expression_node(args, n_id, operator, val_id).map(Some)
}