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Beginning Student Language (BSL) is a programming language in DrRacket. This repository provides some useful BSL-Tools, such as

  • Abstract Syntax Tree
  • Stepper (Auswertungskontext)
  • BSL "Try out" box (Generator)

and semantical support for other grammars.

The module is distributed as a single JavaScript file and an optional additional Racket file for use with Scribble.

The documentation and demos are available at https://se-tuebingen.github.io/bsl-tools/. Compile and Publish Test Pages

You can download them from Releases, the current test build shows the "Development Build" and corresponds to the state of the main branch, you can download semantic versioned editions.

BSL Abstract Syntax Tree

Here we provide the grammar of the BSL Core Language from the Info 1 script, which was our motivation to develop these tools.

<program>     ::=    <def-or-expr>*
<def-or-expr> ::=    <definition> | <e>
<definition>  ::=    ( define ( <name> <name>+ ) <e> )
               |     ( define <name> <e> )
               |     ( define-struct <name> ( <name>* ) )
<e>           ::=    ( <name> <e>*)
               |     ( cond {[<e>,<e>]}+)
               |     <name>
               |     <v>

For reference see also the Racket webpage for BSL and the Info 1 script at 8.3