[vim/vim] Vim9: wrong type for the rest of a tuple in an unpack assignment (PR #21059)

[h_east]

Problem:  In an unpack assignment the variable after the ";" gets the type
          of the whole tuple instead of the type of the remaining items.
          When the assigned value has type "any" it even gets a list type,
          so that a tuple cannot be assigned to it later.
Solution: Give the variable the type of the remaining items.  Keep "any"
          when it is not known whether a list or a tuple is assigned.

fixes: #21057
fixes: #21058

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You can view, comment on, or merge this pull request online at:

  https://github.com/vim/vim/pull/21059

Commit Summary

• 0f294ab Vim9: wrong type for the rest of a tuple in an unpack assignment

File Changes

(4 files)

• M src/testdir/test_tuple.vim (29)
• M src/vim9compile.c (5)
• M src/vim9instr.c (45)
• M src/vim9type.c (3)

Patch Links:

• https://github.com/vim/vim/pull/21059.patch
• https://github.com/vim/vim/pull/21059.diff

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[h_east]

h-east left a comment (vim/vim#21059)

Updated vim9.txt.

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