fluidattacks-blends-domain 0.6.0

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

use crate::query::{adj_ast, match_ast_d};
use crate::syntax::builders::method_declaration::{
    build_method_declaration_node, MethodDirectChildren, MethodListChildren,
};
use crate::syntax::fields::c_sharp::lambda_expression;
use crate::syntax::{SyntaxGraphArgs, SyntaxGraphError};
use crate::NodeId;

pub fn reader(
    args: &mut SyntaxGraphArgs<'_>,
    n_id: NodeId,
) -> Result<Option<NodeId>, SyntaxGraphError> {
    let body_id = args.required_field_alt(n_id, lambda_expression::BODY)?;
    let graph = args.ast_graph;
    let param_id = match_ast_d(graph, n_id, "identifier", Some(1))
        .or_else(|| match_ast_d(graph, n_id, "parameter_list", Some(1)))
        .or_else(|| adj_ast(graph, n_id, None, &[]).first().copied());

    let direct = MethodDirectChildren {
        block_id: Some(body_id),
        parameters_id: param_id,
        ..MethodDirectChildren::default()
    };
    build_method_declaration_node(
        args,
        n_id,
        Some(String::from("LambdaExpression")),
        &direct,
        &MethodListChildren::default(),
        None,
    )
    .map(Some)
}