# RFCs

This document tracks unimplemented RFCs.

## Deprecate extends keyword

Use Python style for extends
  let Bar = class {}
  let Baz = class(Bar) //(instead of Baz = class extends Bar

**Status**: Implemented

## Introduce way to call builtin table methods

to avoid ambiguity with table fields {values = @() print("values")}.values()
Introduce operator '.$' (as well as ?.$ )
  ```
    print({keys = 1}.$keys()?[0]) //will print 'keys', not 'null'

**Status**: Implemented.

## Deprecate delete operator

Use rawdelete instead

**Status**: Implemented, as optional behavior specified with pragma #forbid-delete-operator #allow-delete-operator.

## Deprecate clone operator and replace it with .clone method

**Status**: Implemented, as optional behavior currently. Can be specified by #forbid-clone-operator or #allow-clone-operator

## Add is_frozen method to array and table

**Status**: Implemented

## Add for and foreach in ranges

Syntax like:
  ```
  for (range:integer)
  for (start_of_range:integer, end_of_range:integer)
  foreach (i in range:integer)
  ```

Will allow to make code faster and safer than with for(local i=0; i<range; i++)

**Status**: Implemented.

## Automatically assign names to unnamed functions

like `let foo = function() {}` == `let foo = function foo() {}`
or {foo = function()} == {foo = function foo()}

**Status**: Implemented.

## Replace let with const

Replace 'let' for immutables with 'const' keyword
or make them aliases.

const and let for simple types works the same from coder PoV, but differently under the hood.
for other types const should generate 'binding' like let do now.

**Status**: Needs implementation

## Return back _inherited and _newmember metamethods for classes, or implement some other way to validate children classes

**Status**: Needs implementation and detailed rfc

## Remove :: operator

Use getroottable() or write your own wrapper for shorter syntax

**Status**: Needs implementation and detailed rfc

## NaN-tagging

**Status**: Needs implementation and detailed rfc

## Incremental GC

**Status**: Needs implementation and detailed rfc

## Expression folding

**Status**: Needs implementation and detailed rfc

## Insert-ordered tables (like in Python)

**Status**: Needs implementation and detailed rfc

## Spread operator

like https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Spread_syntax

**Status**: Needs implementation and detailed rfc

## AST optimizations

- loop unrolling
- filter + map folding, dead-code elimation
- Hoisting immutable variables

**Status**: Needs detailed rfc