These are my haskell stack templates. The initial template I’m creating is the basic template. The idea is to start with the basic version of a project; no tests, no library, just a single executable. This allows me to spin up a simple project quickly, and include the readme info I need to get rolling.
Template for a project for the front end of a compiler specified by a Labelled BNF Grammar, from which is generated a parser and lexer using a tool called the BNF Converter. This results in abstract syntax tree types, a lexer, a parser, and a simple wrapper with which to experiment.
When utilizing this template, you’ll need to specify a name for the language specified by the grammar. This is used to create the cf file that species the grammer. The template populates the initial grammar file (cf file) with a simple expression grammar. This is the format for specifying paramaters with stack templates:
$ stack new efvincent/lang MyCompiler -p "lang:MyLang"The template will create a shell script that runs the BNFC tool to create the Haskell AST, parser, lexer, and test module. The script requires lexer and parser generators alex and happy, which can be installed by stack. Note this only needs to be done once on a workstation, not once per project. TODO: Modify the build script to detect the absence of alex or happy and give instructions for installations, or link back to this page.
$ stack install alex
$ stack install happyYou’ll have to set the script executable and run it manually, I haven’t seen how that can be done with a template. The script also wires up Main.hs to call the test module, so be careful of running it if you’ve put something you care about in Main.hs.
$ chmod +x buildMyLang.sh
$ ./buildMyLang.sh