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Do not permit a nullable reference type for an is operator #32025

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gafter opened this issue Dec 26, 2018 · 1 comment
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Do not permit a nullable reference type for an is operator #32025

gafter opened this issue Dec 26, 2018 · 1 comment
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Area-Compilers Bug Feature - Nullable Reference Types Nullable Reference Types
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16.0.P3

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gafter commented Dec 26, 2018

The is-type operator returns false when the left operand is null, for example in e is string?. It should therefore be a semantic error when the type given is a nullable reference type, as in this example. We already make that an error for the is-pattern operator, for example in e is string? s.
@gafter gafter added this to the 16.0.P2 milestone Dec 26, 2018
@gafter gafter self-assigned this Dec 29, 2018
This was referenced Jan 3, 2019
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@alrz alrz mentioned this issue Jan 14, 2019
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gafter added a commit to gafter/roslyn that referenced this issue Jan 16, 2019
@gafter
Move error checking for invalid array dimensions out of the parser an…
fb6b088 
…d into semantic analysis

- Move error checking for invalid array dimensions out of the parser and into semantic analysis
- Diagnose `e is string?`
Fixes dotnet#32025
@gafter gafter modified the milestones: 16.0.P2, 16.0.P3 Jan 16, 2019
@gafter gafter modified the milestones: 16.0.P3, 16.0.P4 Jan 25, 2019
gafter pushed a commit that referenced this issue Jan 25, 2019
Nullable annotation is no longer part of array rank specifier (#32431)
0bee025 
Fixes #32290 
Fixes #32169 
Fixes #32141 
Fixes #32025
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gafter commented Jan 25, 2019

Fixed in #32431.

@gafter gafter closed this as completed Jan 25, 2019
xoofx pushed a commit to stark-lang/stark-roslyn that referenced this issue Apr 16, 2019
Nullable annotation is no longer part of array rank specifier (dotnet…
83d7949 
…#32431)

Fixes dotnet#32290 
Fixes dotnet#32169 
Fixes dotnet#32141 
Fixes dotnet#32025
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Area-Compilers Bug Feature - Nullable Reference Types Nullable Reference Types
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