GitLab

Created by: dvkt

I have been thinking about this for a while and am not sure if there's any point, but seeing 25ed0ab5 made me think of it again.

This branch allows you to define LDPL sub-procedures in C++ from within LDPL. It's similar to STORE QUOTE where it just dumps everything you give it into the compiled code, except it looks for {$varname} or {$subname}() and replaces them with LDPL variables for convenience.

I'm not sure it's worth making the compiler more complicated but I needed to see this working to satisfy my curiosity. :^ ) If this isn't a fit we don't have to add it. It's probably easier to just write a .cpp file and include it directly with -i=.

Here's what it looks like:

DATA:
x is number
y is number
sum is number

PROCEDURE:
internal sub-procedure fast-add 
    {$sum} = {$x} + {$y};
end sub-procedure

display "X value: "
accept x 

display "Y value: "
accept y

call sub-procedure fast-add

display "Sum is " sum crlf

Or like this:

DATA:
name is text

PROCEDURE:
sub-procedure prompt
    display "Enter your name: "
    accept name
end sub-procedure

internal sub-procedure greet
    if({$name}.empty()){
        {$prompt}();
    }
    cout << "Hi there, " << {$name} << "!!" << endl;
end sub-procedure

call sub-procedure greet