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f3ae135604
go/doc/next/2-language.md
Robert Griesemer f3ae135604 doc: document GOEXPERIMENT=aliastypeparams in release notes 
For #65614.

Change-Id: I05b20a80b1163e1d3927c2f763ef6b7d20e6a937
Reviewed-on: https://go-review.googlesource.com/c/go/+/590617
Reviewed-by: Robert Griesemer <gri@google.com>
Auto-Submit: Robert Griesemer <gri@google.com>
TryBot-Bypass: Robert Griesemer <gri@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
2024-06-05 15:56:51 +00:00

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Changes to the language

Go 1.23 makes the (Go 1.22) "range-over-func" experiment a part of the language. The "range" clause in a "for-range" loop now accepts iterator functions of the following types

    func(func() bool)
    func(func(K) bool)
    func(func(K, V) bool)

as range expressions. Calls of the iterator argument function produce the iteration values for the "for-range" loop. For details see the language spec.

Go 1.23 includes preview support for generic type aliases. Building the toolchain with GOEXPERIMENT=aliastypeparams enables this feature.