fluidattacks-blends-domain 0.17.1

Blends functional core: pure AST graph to syntax graph (no_std)
Documentation 
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use crate::{
    query::adj_ast,
    syntax::{
        builders::if_statement::build_if_node, fields::Field, SyntaxGraphArgs, SyntaxGraphError,
    },
    NodeId,
};

const ALTERNATIVE: Field<false> = Field::new("alternative_id");
const CONDITION: Field<false> = Field::new("condition_id");
const CONSEQUENCE: Field<false> = Field::new("consequence_id");
pub fn reader(
    args: &mut SyntaxGraphArgs<'_>,
    n_id: NodeId,
) -> Result<Option<NodeId>, SyntaxGraphError> {
    let graph = args.ast_graph;

    let condition_id = match args.optional_field_alt(n_id, CONDITION) {
        Some(id) => id,
        None => *adj_ast(graph, n_id, Some(1), &[])
            .first()
            .ok_or(SyntaxGraphError::UnexpectedAstShape)?,
    };

    let true_id = args.optional_field_alt(n_id, CONSEQUENCE);
    let false_id = args.optional_field_alt(n_id, ALTERNATIVE);

    build_if_node(args, n_id, condition_id, true_id, false_id, None).map(Some)
}