leo-passes 1.6.2

Compiler passes for the Leo programming language
Documentation 
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// Copyright (C) 2019-2022 Aleo Systems 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::SymbolTable;

use leo_ast::Function;
use leo_span::Symbol;

use indexmap::IndexMap;

pub struct CodeGenerator<'a> {
    /// The symbol table for the program.
    pub(crate) symbol_table: &'a SymbolTable,
    /// A counter to track the next available register.
    pub(crate) next_register: u64,
    /// Reference to the current function.
    pub(crate) current_function: Option<&'a Function>,
    /// Mapping of variables to registers.
    pub(crate) variable_mapping: IndexMap<&'a Symbol, String>,
    /// Mapping of composite names to a tuple containing metadata associated with the name.
    /// The first element of the tuple indicate whether the composite is a record or not.
    /// The second element of the tuple is a string modifier used for code generation.
    pub(crate) composite_mapping: IndexMap<&'a Symbol, (bool, String)>,
    /// Are we traversing a transition function?
    pub(crate) is_transition_function: bool,
    /// Are we traversing a finalize block?
    pub(crate) in_finalize: bool,
}

impl<'a> CodeGenerator<'a> {
    /// Initializes a new `CodeGenerator`.
    pub fn new(symbol_table: &'a SymbolTable) -> Self {
        // Initialize variable mapping.
        Self {
            symbol_table,
            next_register: 0,
            current_function: None,
            variable_mapping: IndexMap::new(),
            composite_mapping: IndexMap::new(),
            is_transition_function: false,
            in_finalize: false,
        }
    }
}