quantrs2-tytan 0.1.3

//! Import system for the problem DSL.

use super::macros::Macro;
use super::stdlib::{BuiltinFunction, Template};
use quantrs2_anneal::qubo::Variable;
use std::collections::HashMap;

/// Import resolver
#[derive(Debug, Clone)]
pub struct ImportResolver {
    /// Import paths
    pub paths: Vec<String>,
    /// Loaded modules
    pub modules: HashMap<String, Module>,
    /// Symbol table
    pub symbols: HashMap<String, ImportedSymbol>,
}

#[derive(Debug, Clone)]
pub struct Module {
    pub name: String,
    pub exports: HashMap<String, ExportedItem>,
}

#[derive(Debug, Clone)]
pub enum ExportedItem {
    Variable(Variable),
    Function(BuiltinFunction),
    Template(Template),
    Macro(Macro),
}

#[derive(Debug, Clone)]
pub struct ImportedSymbol {
    pub module: String,
    pub original_name: String,
    pub local_name: String,
}

impl ImportResolver {
    /// Create a new import resolver
    pub fn new() -> Self {
        Self {
            paths: Vec::new(),
            modules: HashMap::new(),
            symbols: HashMap::new(),
        }
    }

    /// Add import path
    pub fn add_path(&mut self, path: String) {
        self.paths.push(path);
    }

    /// Load module
    pub const fn load_module(&mut self, _name: &str) -> Result<(), String> {
        // Placeholder implementation
        Ok(())
    }

    /// Import symbol
    pub fn import_symbol(
        &mut self,
        module: &str,
        symbol: &str,
        alias: Option<&str>,
    ) -> Result<(), String> {
        let local_name = alias.unwrap_or(symbol).to_string();

        self.symbols.insert(
            local_name.clone(),
            ImportedSymbol {
                module: module.to_string(),
                original_name: symbol.to_string(),
                local_name,
            },
        );

        Ok(())
    }
}

impl Default for ImportResolver {
    fn default() -> Self {
        Self::new()
    }
}