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::else_clause::build_else_clause_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 mut body_id = match_ast(graph, n_id, &["else"], None)
        .get("__0__")
        .copied()
        .flatten();

    if let Some(id) = body_id {
        if graph.label_type(id) == Some("expression_statement") {
            body_id = match_ast(graph, id, &[], None)
                .get("__0__")
                .copied()
                .flatten();
        }
    }

    if let Some(id) = body_id {
        if graph.label_type(id) == Some("parenthesized_expression") {
            body_id = match_ast(graph, id, &[], None)
                .get("__1__")
                .copied()
                .flatten();
        }
    }

    let body_id = match body_id {
        Some(id) => id,
        None => *adj_ast(graph, n_id, None, &[])
            .last()
            .ok_or(SyntaxGraphError::UnexpectedAstShape)?,
    };

    build_else_clause_node(args, n_id, body_id).map(Some)
}