leo-passes 2.5.0

Compiler passes for the Leo programming language
Documentation 
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// Copyright (C) 2019-2025 Provable Inc.
// This file is part of the Leo library.

// The Leo library is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.

// The Leo library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with the Leo library. If not, see <https://www.gnu.org/licenses/>.

use crate::Destructurer;

use leo_ast::{
    AccessExpression,
    ArrayAccess,
    Expression,
    ExpressionReconstructor,
    IntegerType,
    Literal,
    Statement,
    TupleAccess,
    Type,
};

impl ExpressionReconstructor for Destructurer<'_> {
    type AdditionalOutput = Vec<Statement>;

    /// Replaces a tuple access expression with the appropriate expression.
    fn reconstruct_tuple_access(&mut self, input: TupleAccess) -> (Expression, Self::AdditionalOutput) {
        let Expression::Identifier(identifier) = input.tuple.as_ref() else {
            panic!("SSA guarantees that subexpressions are identifiers or literals.");
        };

        // Lookup the expression in the tuple map.
        match self.tuples.get(&identifier.name).and_then(|tuple_expr| tuple_expr.elements.get(input.index.value())) {
            Some(element) => (element.clone(), Default::default()),
            None => {
                if matches!(self.type_table.get(&identifier.id), Some(Type::Future(_))) {
                    (
                        Expression::Access(AccessExpression::Array(ArrayAccess {
                            array: Box::new(Expression::Identifier(*identifier)),
                            index: Box::new(Expression::Literal(Literal::Integer(
                                IntegerType::U32,
                                input.index.to_string(),
                                input.span,
                                Default::default(),
                            ))),
                            span: input.span,
                            id: input.id,
                        })),
                        Default::default(),
                    )
                } else {
                    panic!("SSA guarantees that all tuple accesses are declared and indices are valid.")
                }
            }
        }
    }
}