How To Install frown-doc on Ubuntu 18.04
Introduction
In this tutorial we learn how to install frown-doc on Ubuntu 18.04.
What is frown-doc
frown-doc is:
Frown is an LALR(k) parser generator for Haskell 98 written in Haskell 98.
Its salient features are: - The generated parsers are time and space efficient. On the downside, the parsers are quite large. - Frown generates four different types of parsers. as a common characteristic, the parsers are genuinely functional (ie ‘table-free’); the states of the underlying LR automaton are encoded as mutually recursive functions. Three output formats use a typed stack representation, and one format due to Ross Paterson (code=stackless) works even without a stack. - Encoding states as functions means that each state can be treated individually as opposed to a table-driven approach, which necessitates a uniform treatment of states. For instance, look-ahead is only used when necessary to resolve conflicts. - Frown comes with debugging and tracing facilities; the standard output format due to Doaitse Swierstra (code=standard) may be useful for teaching LR parsing. - Common grammatical patterns such as repetition of symbols can be captured using rule schemata. There are several predefined rule schemata. - Terminal symbols are arbitrary variable-free Haskell patterns or guards. Both terminal and nonterminal symbols may have an arbitrary number of synthesized attributes. - Frown comes with extensive documentation; several example grammars are included. Furthermore, Frown supports the use of monadic lexers, monadic semantic actions, precedences, and associativity, the generation of backtracking parsers, multiple start symbols, error reporting, and a weak form of error correction.
There are three methods to install frown-doc on Ubuntu 18.04. We can use apt-get, apt and aptitude. In the following sections we will describe each method. You can choose one of them.
Install frown-doc Using apt-get
Update apt database with apt-get using the following command.
sudo apt-get update
After updating apt database, We can install frown-doc using apt-get by running the following command:
sudo apt-get -y install frown-doc
Install frown-doc Using apt
Update apt database with apt using the following command.
sudo apt update
After updating apt database, We can install frown-doc using apt by running the following command:
sudo apt -y install frown-doc
Install frown-doc Using aptitude
If you want to follow this method, you might need to install aptitude first since aptitude is usually not installed by default on Ubuntu. Update apt database with aptitude using the following command.
sudo aptitude update
After updating apt database, We can install frown-doc using aptitude by running the following command:
sudo aptitude -y install frown-doc
How To Uninstall frown-doc on Ubuntu 18.04
To uninstall only the frown-doc package we can use the following command:
sudo apt-get remove frown-doc
Uninstall frown-doc And Its Dependencies
To uninstall frown-doc and its dependencies that are no longer needed by Ubuntu 18.04, we can use the command below:
sudo apt-get -y autoremove frown-doc
Remove frown-doc Configurations and Data
To remove frown-doc configuration and data from Ubuntu 18.04 we can use the following command:
sudo apt-get -y purge frown-doc
Remove frown-doc configuration, data, and all of its dependencies
We can use the following command to remove frown-doc configurations, data and all of its dependencies, we can use the following command:
sudo apt-get -y autoremove --purge frown-doc
References
Summary
In this tutorial we learn how to install frown-doc package on Ubuntu 18.04 using different package management tools: apt, apt-get and aptitude.
