Test

[RexJaeschke]

V7 Feature List and Current Status

This file identifies the known V7 features, and tracks their status. Although there were minor "dot" releases of V7, committee ECMA TC49/TG2 plans to combine all 7.x features into one V7 spec.

For the most part, the features were spec'd in version-number order. (One exception was that a feature from 7.2 was combined with two related features from 7.0 in a single PR.) Dependencies between feature specs are noted. The Effort is an attempt to show the size/complexity of the proposal, such as small, *medium", or large, allowing TG2 to pick-and-chose the ones they'll work on next.

Unlike with the V6 work, where we had separate and divergent V5 Ecma and MS specs, for V7, we started with a set of MS proposals, some of which were placeholders for which text was never provided. Where they existed, Rex took these proposals, wrote tests, looked at MS (and other) tutorial pages, and created a brach, and for most features, a corresponding (Draft) PR, with the edits he thought were needed. It is quite possible that not everything in any given MS proposal was in fact implemented in that version, and it is also possible that things implemented in a version later on were not spec'd back into the proposal.

For any given feature, Rex actually wrote his version of the final proposal, in a Word file, but using md syntax. This allowed him to order the sets of edits by clause and subclause, and to exploit Word's comment, tracked-change, color, and other features, in order to make the proposal more readable and consistant. A Table-of-Contents was also added, so the reader can see at a glance the areas of the standard impacted by the proposal. This Word document was eventually turned into the branch edits and corresponding PR. For at least some features, it likely will be useful for TG2 members to have access to these Word files, as they may be helpful in seeing the actual changes made, along with "Notes to TG2" that I made fro consideration come processing time. (These Word documents and their associated test currently reside in a DropBox folder to which Bill Wagner has access, as well as on Rex's machine.)

Version	Feature	PR	Status	Effort	Notes
7.0	binary integer literals	45	Open	Small	The following features were combined: binary integer literals, embedded digit separators in numeric literals, leading digit separators in bin/hex integer literals.
7.0	embedded digit separators in numeric literals	45	Open	Small	The following features were combined: binary integer literals, embedded digit separators in numeric literals, leading digit separators in bin/hex integer literals.
7.0	out variables	44	Open	Medium	The following features were combined: out variables, Discards, use expression variables in more locations
7.0	Discards	44	Open	Medium	The following features were combined: out variables, Discards, use expression variables in more locations
7.0	Tuples	63 but needs some work	Open	Large	The following features were combined: Tuples, Inferred tuple element names, test == and != with tuple types.
7.0	Pattern Matching	61	Open	Large	The following features were combined: Pattern Matching, Pattern matching on generic type parameters, use expression variables in more locations.
7.0	ref locals and returns	213	Open		Combination #4
7.0	Local Functions	104	Open	Small
7.0	More expression-bodied members	69	Open	Small
7.0	throw Expressions	65 but needs some work	Open
7.0	Generalized async return types	In progress	Open
7.1	async Main method	70	Open
7.1	default literal expressions	236	Open
7.1	Inferred tuple element names - see MS Proposal	63 but needs some work	Open	Large	The following features were combined: Tuples, Inferred tuple element names, test == and != with tuple types.
7.1	Pattern matching on generic type parameters	61	Open	Large	The following features were combined: Pattern Matching, Pattern matching on generic type parameters, use expression variables in more locations.
7.2	leading digit separators in bin/hex integer literals	45	Open	Small	The following features were combined: binary integer literals, embedded digit separators in numeric literals, leading digit separators in bin/hex integer literals.
7.2	Non-trailing named arguments	216	Open
7.2	private protected access modifier	215	Open
7.2	Conditional ref expressions	213	Open		Combination #4
7.2	in parameter modifier	219	Open		Combination #5
7.2	ref with this in extension methods	219	Open		Combination #5
7.2	readonly and ref structs	In progress	Open
7.3	indexing movable fixed buffer without pinning	239	Open
7.3	reassign ref local variables	213	Open		Combination #4
7.3	use initializers on stackalloc arrays	238	Open
7.3	Support for Pattern-Based fixed Statements	240	Open
7.3	use additional generic constraints	244	Open
7.3	test == and != with tuple types	63 but needs some work	Open	Large	The following features were combined: Tuples, Inferred tuple element names, test == and != with tuple types.
7.3	use expression variables in more locations	44, 61	Open	Medium	The following features were combined: out variables, Discards, use expression variables in more locations. Large
7.3	attach attributes to the backing field of auto-implemented properties	262	Open
7.3	overload resolution now has fewer ambiguous cases	263	Open