macro preproc

[andrieshiemstra]

something like this

//# // define console_debug macro
//#function console_debug(line){
//#    if ($GRECO_DEBUG) {
//#        // write actually writes to js/ts code
//#        write("console.debug('"+line+"')");
//#    }
//#}
function do_stuff(){
    //#console_debug('doing stuff');
    console.log("do stuff");
}

all files are evaluated in the same context so you can define and redifine functions and variables

The code above will expand to the following if $GRECO_DEBUG = true; (running in debug mode)

function do_stuff(){
    console.debug('doing stuff');
    console.log("do stuff");
}

comments are removed, lines are preserved so line numbers still make sense

a rust util will extract all code prepended by //# and replace all others with write(line)

the whole file is then evaluated with a new write method/buffer and the output is actually used/stored/cached etc