fluidattacks-blends-domain 0.37.0

Blends functional core: pure AST graph to syntax graph (no_std)
Documentation 
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use alloc::string::String;
use alloc::vec::Vec;

use crate::query::match_ast_group_d;
use crate::syntax::builders::expression_statement::{
    build_variable_declaration_group_node, VarNameEntry,
};
use crate::syntax::builders::variable_declaration::build_variable_declaration_node;
use crate::syntax::fields::go::field_declaration;
use crate::syntax::{SyntaxGraphArgs, SyntaxGraphError};
use crate::utilities::text_nodes::node_to_str;
use crate::NodeId;

pub fn reader(
    args: &mut SyntaxGraphArgs<'_>,
    n_id: NodeId,
) -> Result<Option<NodeId>, SyntaxGraphError> {
    let type_id = args.required_field_alt(n_id, field_declaration::TYPE)?;

    let graph = args.ast_graph;
    let type_name = Some(node_to_str(graph, type_id));

    let name_ids = match_ast_group_d(graph, n_id, "field_identifier", Some(1));
    if name_ids.is_empty() {
        return build_variable_declaration_node(
            args,
            n_id,
            String::new(),
            type_name,
            None,
            None,
            None,
        )
        .map(Some);
    }

    let entries: Vec<VarNameEntry> = name_ids
        .into_iter()
        .map(|name_id| VarNameEntry {
            name: node_to_str(graph, name_id),
            name_id,
            type_name: type_name.clone(),
            value_id: None,
        })
        .collect();

    build_variable_declaration_group_node(args, n_id, &entries).map(Some)
}