fluidattacks-blends-domain 0.6.1

Blends functional core: pure AST graph to syntax graph (no_std)
Documentation 
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//! Counterpart of `blends/syntax/readers/c_sharp/method_declaration.py`.

use alloc::vec::Vec;

use crate::query::{match_ast, match_ast_group_d};
use crate::syntax::builders::method_declaration::{
    build_method_declaration_node, MethodDirectChildren, MethodListChildren,
};
use crate::syntax::fields::c_sharp::{local_function_statement, method_declaration};
use crate::syntax::readers::c_sharp::common::access_modifiers;
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> {
    // Adopting the identifier line as `label_l` is deferred to a later change.
    let graph = args.ast_graph;
    let (name_id, block_id, parameters_id) = match graph.label_type(n_id) {
        Some("local_function_statement") => (
            args.required_field_alt(n_id, local_function_statement::NAME)?,
            args.optional_field_alt(n_id, local_function_statement::BODY),
            args.required_field_alt(n_id, local_function_statement::PARAMETERS)?,
        ),
        Some("method_declaration") => (
            args.required_field_alt(n_id, method_declaration::NAME)?,
            args.optional_field_alt(n_id, method_declaration::BODY),
            args.required_field_alt(n_id, method_declaration::PARAMETERS)?,
        ),
        _ => return Err(SyntaxGraphError::UnexpectedAstShape),
    };
    let name = node_to_str(graph, name_id);
    let include_params = match_ast(graph, parameters_id, &["(", ")"], None).contains_key("__0__");
    let attributes_ids = match_ast_group_d(graph, n_id, "attribute_list", Some(1));
    let modifiers = access_modifiers(graph, n_id);

    let direct = MethodDirectChildren {
        block_id,
        modifiers_id: None,
        parameters_id: include_params.then_some(parameters_id),
    };
    let list_children = MethodListChildren {
        modifiers_ids: attributes_ids,
        parameters_ids: Vec::new(),
    };

    build_method_declaration_node(args, n_id, Some(name), &direct, &list_children, modifiers)
        .map(Some)
}