fluidattacks-blends-domain 0.6.1

Blends functional core: pure AST graph to syntax graph (no_std)
Documentation 
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use crate::query::{adj_ast, match_ast};
use crate::syntax::builders::while_statement::build_while_statement_node;
use crate::syntax::{SyntaxGraphArgs, SyntaxGraphError};
use crate::{CodeGraph, NodeId};

pub fn reader(
    args: &mut SyntaxGraphArgs<'_>,
    n_id: NodeId,
) -> Result<Option<NodeId>, SyntaxGraphError> {
    let graph = args.ast_graph;
    let match_childs = match_ast(graph, n_id, &["block", "binary_expression"], None);
    let mut block_id = match_childs
        .get("block")
        .copied()
        .flatten()
        .or_else(|| adj_ast(graph, n_id, None, &[]).into_iter().next_back())
        .ok_or(SyntaxGraphError::UnexpectedAstShape)?;
    if graph.label_type(block_id) == Some("expression_statement") {
        block_id = adj_ast(graph, block_id, None, &[])
            .into_iter()
            .next()
            .ok_or(SyntaxGraphError::UnexpectedAstShape)?;
    }
    let condition_id = match_childs.get("binary_expression").copied().flatten();
    build_while_statement_node(args, n_id, block_id, condition_id).map(Some)
}