Add for loop

[PoetaKodu]

Status

Currently waiting for templates and concepts implementation to implement range-for

Checklist

• Parsing of the default form for (init; cond; iter) body
• Execution of the default form
• Parsing of the range-for
• Execution of the range-for

Default for

for (var i = 0; i < arr.size(); i += 1) {
    // body
}

general form:

for ( init-statement condition; iteration-statement) {
    // body
}

Range-for

for (elem of arr) {
    // elem is immutable copy of each arr element
}

general form:

for (variable-def-no-init of range) {

}

for (variable-name in indexed-range) {
    // variable-name is a key of each element in the indexed-range
    // indexed-range[variable-name] is a valid reference or value inside the range
}

// TODO: support for number range

[Dich0tomy]

General for statement grammar done.
Now I'm trying to implement it in the VM so that we can actually see some effect on the screen.

[Dich0tomy]

The general for loop form is implemented in the VM and it seems to work.
No bugs have been reported, no issues have been found.