Feature - Implemented Template strings in ash!

[gausie]

I've been recovering from what was hopefully not coronavirus and wanting to do some programming without actually returning to my day job just yet, so here I am.

Like python's f strings and JavaScript's template strings, I wrote some changes to Parser.java to achieve the same thing for ASH. If you use backticks (`) to define a string, you can then use curly braces to concatenate expressions in a fashion that's a little more fluent and terse.

For example:

print(`Hello, {my_name()}! How are you doing today?`);

visit_url(`choice.php?pwd=&whichchoice=1395&pwd&option={pill}`);

I've tested it extensively, including various combinations of escaped tokens but still posting a patch here before I commit it to gauge if it's a desired feature as much as to sense check the code itself

 

[Veracity]

With the exception of the System.out.println() debugging calls, this looks pretty neat.
And useful. It obviates all sorts of explicit string concatenation with "+".

 

[gausie]

With the exception of the System.out.println() debugging calls

Whoops!

But thanks Veracity. I'll go ahead and merge it once I've sorted that.

 

[gausie]

r19904!