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# a8e2bb39 17-Mar-2018 Zhihao Yuan <[email protected]>

Fix codegen for structured binding binding in conditions

Summary:
The codegen for conditions assumes that a normal variable declaration is used in a condition, but this is not the case when a struct

Fix codegen for structured binding binding in conditions

Summary:
The codegen for conditions assumes that a normal variable declaration is used in a condition, but this is not the case when a structured binding is used.

This fixes [PR36747](http://llvm.org/pr36747).

Thanks Nicolas Lesser for contributing the patch.

Reviewers: lichray, rsmith

Reviewed By: lichray

Subscribers: cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D44534

llvm-svn: 327780

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Revision tags: llvmorg-5.0.2-rc1, llvmorg-6.0.0, llvmorg-6.0.0-rc3, llvmorg-6.0.0-rc2, llvmorg-6.0.0-rc1
# c81f4538 07-Dec-2017 Zhihao Yuan <[email protected]>

Allow conditions to be decomposed with structured bindings

Summary:
This feature was discussed but not yet proposed. It allows a structured binding to appear as a //condition//

if (auto [ok, v

Allow conditions to be decomposed with structured bindings

Summary:
This feature was discussed but not yet proposed. It allows a structured binding to appear as a //condition//

if (auto [ok, val] = f(...))

So the user can save an extra //condition// if the statement can test the value to-be-decomposed instead. Formally, it makes the value of the underlying object of the structured binding declaration also the value of a //condition// that is an initialized declaration.

Considering its logicality which is entirely evident from its trivial implementation, I think it might be acceptable to land it as an extension for now before I write the paper.

Reviewers: rsmith, faisalv, aaron.ballman

Reviewed By: rsmith

Subscribers: aaron.ballman, cfe-commits

Differential Revision: https://reviews.llvm.org/D39284

llvm-svn: 320011

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