fluidattacks-blends-domain 0.26.0

Blends functional core: pure AST graph to syntax graph (no_std)
Documentation 
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use crate::{
    query::label_text,
    syntax::{
        builders::symbol_lookup::build_symbol_lookup_node, SyntaxGraphArgs, SyntaxGraphError,
    },
    utilities::text_nodes::node_to_str,
    NodeId,
};
use alloc::borrow::ToOwned;
use alloc::string::String;

#[expect(
    clippy::unnecessary_wraps,
    reason = "the signature must match the reader dispatch table"
)]
pub fn reader(
    args: &mut SyntaxGraphArgs<'_>,
    n_id: NodeId,
) -> Result<Option<NodeId>, SyntaxGraphError> {
    let graph = args.ast_graph;

    let value = label_text(graph, n_id)
        .filter(|text| !text.is_empty())
        .map_or_else(|| node_to_str(graph, n_id), str::to_owned);

    let symbol = if value.starts_with(|c: char| c.is_ascii_alphabetic() || c == '_') {
        value
            .chars()
            .take_while(|c| c.is_ascii_alphanumeric() || *c == '_')
            .collect::<String>()
    } else {
        String::new()
    };

    Ok(Some(build_symbol_lookup_node(args, n_id, symbol)))
}