fluidattacks-blends-domain 0.2.0

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

use crate::syntax::{SyntaxGraphArgs, SyntaxGraphError, SyntaxNode};
use crate::NodeId;

pub fn build_unary_expression_node(
    args: &mut SyntaxGraphArgs<'_>,
    n_id: NodeId,
    operator: String,
    operand_id: NodeId,
) -> Result<NodeId, SyntaxGraphError> {
    let is_sanitizing = operator.as_str() == "!";

    args.syntax_graph.add_node(
        n_id,
        SyntaxNode::UnaryExpression {
            operator,
            operand_id,
        },
    );

    let condition_parent = if is_sanitizing {
        args.metadata
            .sanitization_stack
            .last()
            .filter(|(kind, _)| kind == "condition_pending")
            .map(|(_, parent_id)| *parent_id)
    } else {
        None
    };
    if let Some(parent_id) = condition_parent {
        args.metadata
            .sanitization_stack
            .push((String::from("condition"), parent_id));
    }

    let built_operand = args.generic(operand_id)?;
    args.syntax_graph.add_ast_edge(n_id, built_operand);

    if condition_parent.is_some() {
        args.metadata.sanitization_stack.pop();
    }

    Ok(n_id)
}