gistfile1.cpp

std::unique_ptr<TranslationUnit> TranslationUnit::Parse( Lexer::Lexer& lexer )
{
    lexer.PushRestorePoint();

    if( lexer.PeekToken() == Lexer::TokenType::TECHNIQUE )
    {
        lexer.Consume();
        std::string name;
        if( lexer.PeekToken() == Lexer::TokenType::IDENTIFIER )
        {
            name = lexer.PeekString();
            lexer.Consume();
        }
        if( lexer.PeekToken() == Lexer::TokenType::OPEN_BRACE )
        {
            lexer.Consume();
            if( lexer.PeekToken() = Lexer::TokenType::CLOSE_BRACE )
            {
                lexer.Consume();
                lexer.PopRestorePoint();
                return std::unique_ptr<TranslationUnit>( new TranslationUnit( name ) );
            }
        }
    }
    lexer.Restore();
    return nullptr;
}

std::unique_ptr<TranslationUnit> TranslationUnit::Parse( Lexer::Lexer& lexer )
{
    lexer.PushRestorePoint();

    if( lexer.PeekToken() != Lexer::TokenType::TECHNIQUE )
        goto error;
    lexer.Consume();

    std::string name;
    if( lexer.PeekToken() == Lexer::TokenType::IDENTIFIER )
    {
        name = lexer.PeekString();
        lexer.Consume();
    }

    if( lexer.PeekToken() != Lexer::TokenType::OPEN_BRACE )
        goto error;
    lexer.Consume();

    if( lexer.PeekToken() != Lexer::TokenType::CLOSE_BRACE )
        goto error;
    lexer.Consume();
    
    lexer.PopRestorePoint();
    return std::unique_ptr<TranslationUnit>( new TranslationUnit( name ) );
    
    error:
    lexer.Restore();
    return nullptr;
}