fluidattacks-blends-domain 0.41.0

Blends functional core: pure AST graph to syntax graph (no_std)
Documentation 
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use crate::{
    query::adj_ast,
    syntax::{
        builders::switch_section::build_switch_section_node, SyntaxGraphArgs, SyntaxGraphError,
    },
    utilities::text_nodes::node_to_str,
    CodeGraph, NodeId,
};
use alloc::string::String;

pub fn reader(
    args: &mut SyntaxGraphArgs<'_>,
    n_id: NodeId,
) -> Result<Option<NodeId>, SyntaxGraphError> {
    let graph = args.ast_graph;
    let child_ids = adj_ast(graph, n_id, Some(1), &[]);

    let arrow_index = child_ids
        .iter()
        .position(|&c_id| graph.label_type(c_id) == Some("->"));
    let cut = arrow_index.unwrap_or(1).min(child_ids.len());
    let condition_ids = child_ids.get(..cut).unwrap_or_default();

    let joined: String = condition_ids
        .iter()
        .map(|&c_id| node_to_str(graph, c_id))
        .collect();
    let case_value = if joined.is_empty() {
        String::from("Default")
    } else {
        joined
    };

    let body_id = child_ids
        .last()
        .copied()
        .ok_or(SyntaxGraphError::UnexpectedAstShape)?;

    build_switch_section_node(args, n_id, case_value, &[body_id]).map(Some)
}