source: translator/SymTab/StackTable.cc @ 51587aa

//
// Cforall Version 1.0.0 Copyright (C) 2015 University of Waterloo
//
// The contents of this file are covered under the licence agreement in the
// file "LICENCE" distributed with Cforall.
//
// StackTable.cc -- 
//
// Author           : Richard C. Bilson
// Created On       : Sun May 17 21:45:15 2015
// Last Modified By : Peter A. Buhr
// Last Modified On : Sun May 17 21:46:59 2015
// Update Count     : 2
//

#include <cassert>

#include "StackTable.h"

namespace SymTab {
    template< typename Element, typename ConflictFunction >
    StackTable< Element, ConflictFunction >::StackTable() : scopeLevel( 0 ) {
        }

    template< typename Element, typename ConflictFunction >
    void StackTable< Element, ConflictFunction >::enterScope() {
                scopeLevel++;
    }

    template< typename Element, typename ConflictFunction >
    void StackTable< Element, ConflictFunction >::leaveScope() {
                for ( typename TableType::iterator it = table.begin(); it != table.end(); ++it ) {
                        std::stack< Entry >& entry = it->second;
                        if ( ! entry.empty() && entry.top().second == scopeLevel ) {
                                entry.pop();
                        } // if
                } // for
                scopeLevel--;
                assert( scopeLevel >= 0 );
    }

    template< typename Element, typename ConflictFunction >
    void StackTable< Element, ConflictFunction >::add( Element *type ) {
                std::stack< Entry >& entry = table[ type->get_name() ];
                if ( ! entry.empty() && entry.top().second == scopeLevel ) {
                        entry.top().first = conflictFunction( entry.top().first, type );
                } else {
                        entry.push( Entry( type, scopeLevel ) );
                } // if
    }

    template< typename Element, typename ConflictFunction >
    void StackTable< Element, ConflictFunction >::add( std::string fwdDeclName ) {
                add( new Element( fwdDeclName ) );
    }

    template< typename Element, typename ConflictFunction >
    Element *StackTable< Element, ConflictFunction >::lookup( std::string id ) const {
                typename TableType::const_iterator it = table.find( id );
                if ( it == table.end() ) {
                        return 0;
                } else if ( ! it->second.empty() ) {
                        return it->second.top().first;
                } else {
                        return 0;
                } // if
    }

    template< typename Element, typename ConflictFunction >
    void StackTable< Element, ConflictFunction >::dump( std::ostream &os ) const {
                for ( typename TableType::const_iterator it = table.begin(); it != table.end(); ++it ) {
                        const std::stack< Entry >& entry = it->second;
                        if ( ! entry.empty() && entry.top().second == scopeLevel ) {
                                os << it->first << std::endl;
                        } // if
                } // for
    }
} // namespace SymTab

// Local Variables: //
// tab-width: 4 //
// mode: c++ //
// compile-command: "make install" //
// End: //