fluidattacks-blends-domain 0.6.0

Blends functional core: pure AST graph to syntax graph (no_std)
Documentation 
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use alloc::borrow::ToOwned;

use crate::query::{label_text, match_ast};
use crate::syntax::builders::binary_operation::build_binary_operation_node;
use crate::syntax::fields::java::binary_expression;
use crate::syntax::{SyntaxGraphArgs, SyntaxGraphError};
use crate::{CodeGraph, NodeId};

fn unwrap_parenthesized(args: &SyntaxGraphArgs<'_>, n_id: NodeId) -> NodeId {
    if args.ast_graph.label_type(n_id) == Some("parenthesized_expression") {
        if let Some(inner) = match_ast(args.ast_graph, n_id, &[], None)
            .get("__1__")
            .copied()
            .flatten()
        {
            return inner;
        }
    }
    n_id
}

pub fn reader(
    args: &mut SyntaxGraphArgs<'_>,
    n_id: NodeId,
) -> Result<Option<NodeId>, SyntaxGraphError> {
    let left_id = unwrap_parenthesized(
        args,
        args.required_field_alt(n_id, binary_expression::LEFT)?,
    );
    let right_id = unwrap_parenthesized(
        args,
        args.required_field_alt(n_id, binary_expression::RIGHT)?,
    );
    let operator_id = args.required_field_alt(n_id, binary_expression::OPERATOR)?;
    let operator = label_text(args.ast_graph, operator_id)
        .ok_or(SyntaxGraphError::UnexpectedAstShape)?
        .to_owned();
    build_binary_operation_node(args, n_id, operator, Some(left_id), Some(right_id)).map(Some)
}