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::if_statement::build_if_node;
use crate::syntax::fields::java::if_statement;
use crate::syntax::{SyntaxGraphArgs, SyntaxGraphError};
use crate::{CodeGraph, NodeId};

fn unwrap_expression_statement(
    args: &SyntaxGraphArgs<'_>,
    n_id: NodeId,
) -> Result<NodeId, SyntaxGraphError> {
    if args.ast_graph.label_type(n_id) == Some("expression_statement") {
        return adj_ast(args.ast_graph, n_id, None, &[])
            .first()
            .copied()
            .ok_or(SyntaxGraphError::UnexpectedAstShape);
    }
    Ok(n_id)
}

pub fn reader(
    args: &mut SyntaxGraphArgs<'_>,
    n_id: NodeId,
) -> Result<Option<NodeId>, SyntaxGraphError> {
    let graph = args.ast_graph;
    let mut condition_id = args.required_field_alt(n_id, if_statement::CONDITION)?;
    if graph.label_type(condition_id) == Some("parenthesized_expression") {
        if let Some(inner) = match_ast(graph, condition_id, &[], None)
            .get("__1__")
            .copied()
            .flatten()
        {
            condition_id = inner;
        }
    }

    let true_id = unwrap_expression_statement(
        args,
        args.required_field_alt(n_id, if_statement::CONSEQUENCE)?,
    )?;
    let false_id = match args.optional_field_alt(n_id, if_statement::ALTERNATIVE) {
        Some(alternative_id) => Some(unwrap_expression_statement(args, alternative_id)?),
        None => None,
    };

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