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Improve condition logic with conditional access expression #54467

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MatthieuMEZIL opened this issue Jun 29, 2021 · 2 comments
Closed

Improve condition logic with conditional access expression #54467

MatthieuMEZIL opened this issue Jun 29, 2021 · 2 comments
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Area-Compilers Resolution-Fixed The bug has been fixed and/or the requested behavior has been implemented untriaged Issues and PRs which have not yet been triaged by a lead

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@MatthieuMEZIL
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If the expression is myDictionnary.TryGetValue(key, out T value) == true ? value : value2, compilation succeeds.
However, if I use myDictionnary?.TryGetValue(key, out T value) == true ? value : value2, compilation fails with the following error:
CS0165 Use of unassigned local variable 'value'.
I believe the logic here could be improved, supporting conditional access expression, to avoid this error.
@dotnet-issue-labeler dotnet-issue-labeler bot added Area-Compilers untriaged Issues and PRs which have not yet been triaged by a lead labels Jun 29, 2021
@Youssef1313
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I believe this is already implemented for C# 10. Proposal: dotnet/csharplang#4465

@RikkiGibson RikkiGibson added the Resolution-Fixed The bug has been fixed and/or the requested behavior has been implemented label Jun 29, 2021
@RikkiGibson
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Thanks for filing the issue. This was fixed by #54004. Shipping in dev17 preview 2.

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@RikkiGibson @MatthieuMEZIL @Youssef1313