WebPage

rascal-0.40.17

Rascal has a builtin notion of webserver and webclients. The clients are browsers that live in the IDE editor window, or the default desktop browser. The servers are Rascal callback functions with the signature Response (Request).

Say we like to visualize this simple table of pairs of characters:

characters = {"Sneezy", "Sleepy", "Dopey", "Doc", "Happy", "Bashful", "Grumpy"};
pairs = (characters * characters) - {<c,c> | c <- characters};

We can translate this information to the abstract syntax of an HTML table:

import lang::html::IO;
import lang::html::AST;
import Content;

HTMLElement table(rel[&T, &U] r)
    = table([
        tr([
            td([text("<a>")]),
            td([text("<b>")])
        ])
    | <a, b> <- r    
    ]);

And then serve it as a page:

rascal>serve(table(pairs));

Interactive web pages are also possible. Have a look in Content.