Add tuple unpacking syntax#23368

Merged

rikkimax merged 37 commits into

dlang:masterfrom

tgehr:unpacking

Jul 19, 2026

Commits on Jul 13, 2026

Parse UnpackDeclaration.
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Semantic analysis for UnpackDeclaration.
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Add UnpackDeclaration to Parameter.
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Parse UnpackDeclaration as foreach variable.
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Semantic analysis for UnpackDeclaration in foreach variable.
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Parse UnpackDeclaration as a function literal parameter.
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Semantic analysis for UnpackDeclaration in function literal parameter.
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[unpacking] Add test

ntrel
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[unpacking] Add `-preview=tuples` CLI switch

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[unpacking] Tweak lone identifier error message, add test

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[unpacking] Fix parsing malformed auto declarations starting with `(` (#7)

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Test extern/scope unpacking.
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[unpacking] Add test for missing identifier in unpack declaration (#9)

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[unpacking] Test semantic errors, tweak RHS mismatch error (#10)

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[unpacking] Add tests for invalid parameter storage classes (#11)

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[unpacking] Support `auto (a, int b) =` (#13)

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[unpacking] Error when unpacking declaration itself has a UDA

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Tweak unpack declaration LOC

ntrel
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Fix ICE in tuple unpack declaration with moved value

MetaLang
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Add changelog entry for new tuple unpacking feature

MetaLang
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Disallow `(T x,) = tup, i = 1;`

ntrel
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[spec/declaration] Unpacking declarations

ntrel
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Change markdown examples to ddoc style `---` for spec consistency

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Tweak wording for pattern without storage class

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Fix AssignExpression links

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Fix lex, type links

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[spec/statement] Unpacking Foreach Variables

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[spec/function] Unpacking Parameters

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[changelog] Mention tuple parameters

ntrel
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Mention unpacking in function literal templates

ntrel
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Fix whitespace.
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Update `globals.h`.
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Fix cxxfrontend tests.
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Fix Ddoc warning.
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Try to appease D-Scanner.
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Refactor preview flag so parser does not import globals.
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Improve style.
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