From 0613537ca0804e61e6fc9ba3fee5ff68408553a0 Mon Sep 17 00:00:00 2001 From: metagn Date: Mon, 18 Dec 2023 22:34:21 +0300 Subject: [PATCH] add tuple unpacking changes to changelog (#23093) closes #23042 Adds changes from #22537 and #22611 to changelog (I believe both are set for 2.2). --- changelog.md | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/changelog.md b/changelog.md index f21ab39da5..db85e25a12 100644 --- a/changelog.md +++ b/changelog.md @@ -7,6 +7,12 @@ - The default user-agent in `std/httpclient` has been changed to `Nim-httpclient/` instead of `Nim httpclient/` which was incorrect according to the HTTP spec. - Methods now support implementations based on a VTable by using `--experimental:vtables`. Methods are then confined to be in the same module where their type has been defined. - With `-d:nimPreviewNonVarDestructor`, non-var destructors become the default. +- A bug where tuple unpacking assignment with a longer tuple on the RHS than the LHS was allowed has been fixed, i.e. code like: + ```nim + var a, b: int + (a, b) = (1, 2, 3, 4) + ``` + will no longer compile. ## Standard library additions and changes @@ -38,6 +44,19 @@ slots when enlarging a sequence. - `member` can be used to attach a procedure to a C++ type. - C++ `constructor` now reuses `result` instead creating `this`. +- Tuple unpacking changes: + - Tuple unpacking assignment now supports using underscores to discard values. + ```nim + var a, c: int + (a, _, c) = (1, 2, 3) + ``` + - Tuple unpacking variable declarations now support type annotations, but + only for the entire tuple. + ```nim + let (a, b): (int, int) = (1, 2) + let (a, (b, c)): (byte, (float, cstring)) = (1, (2, "abc")) + ``` + ## Compiler changes - `--nimcache` using a relative path as the argument in a config file is now relative to the config file instead of the current directory.