fluidattacks-blends-domain 0.6.0

Blends functional core: pure AST graph to syntax graph (no_std)
Documentation 
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use crate::syntax::builders::assignment::build_assignment_node;
use crate::syntax::builders::variable_declaration::build_variable_declaration_node;
use crate::syntax::fields::python::assignment;
use crate::syntax::{SyntaxGraphArgs, SyntaxGraphError};
use crate::utilities::text_nodes::node_to_str;
use crate::{CodeGraph, NodeId};

pub fn reader(
    args: &mut SyntaxGraphArgs<'_>,
    n_id: NodeId,
) -> Result<Option<NodeId>, SyntaxGraphError> {
    let graph = args.ast_graph;
    let target_id = args.required_field_alt(n_id, assignment::LEFT)?;
    let value_id = args.optional_field_alt(n_id, assignment::RIGHT);
    let type_id = args.optional_field_alt(n_id, assignment::TYPE);

    if graph.label_type(target_id) == Some("identifier") || value_id.is_none() {
        let var_name = node_to_str(graph, target_id);
        let var_type = type_id.map(|id| node_to_str(graph, id));
        return build_variable_declaration_node(
            args, n_id, var_name, var_type, value_id, None, None,
        )
        .map(Some);
    }

    let type_str = type_id.map(|id| node_to_str(graph, id));
    build_assignment_node(args, n_id, target_id, value_id, type_str).map(Some)
}