fluidattacks-blends-domain 0.2.0

Blends functional core: pure AST graph to syntax graph (no_std)
Documentation 
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use crate::query::adj_ast;
use crate::syntax::builders::for_statement::build_for_statement_node;
use crate::syntax::fields::c_sharp::for_statement;
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 initializer = args.optional_field_alt(n_id, for_statement::INITIALIZER);
    let condition = args.optional_field_alt(n_id, for_statement::CONDITION);
    let update = args.optional_field_alt(n_id, for_statement::UPDATE);

    let mut body_id = args.required_field_alt(n_id, for_statement::BODY)?;
    if graph.label_type(body_id) == Some("expression_statement") {
        body_id = adj_ast(graph, body_id, None, &[])
            .into_iter()
            .next()
            .ok_or(SyntaxGraphError::UnexpectedAstShape)?;
    }
    if graph.label_type(body_id) == Some("parenthesized_expression") {
        if let Some(second) = adj_ast(graph, body_id, None, &[]).into_iter().nth(1) {
            body_id = second;
        }
    }

    build_for_statement_node(args, n_id, initializer, condition, update, body_id).map(Some)
}