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[Code Style] Add some extra style checks focused on nullability. #17831

Merged
merged 5 commits into from
Jun 22, 2023
Merged

[Code Style] Add some extra style checks focused on nullability. #17831

merged 5 commits into from
Jun 22, 2023

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mandel-macaque
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Added the following new checks:

// dotnet_style_coalesce_expression = true
var v = x ?? y;

// dotnet_style_coalesce_expression = false
var v = x != null ? x : y; // or
var v = x == null ? y : x;
// dotnet_style_null_propagation = true
var v = o?.ToString();

// dotnet_style_null_propagation = false
var v = o == null ? null : o.ToString(); // or
var v = o != null ? o.String() : null;
// dotnet_style_prefer_is_null_check_over_reference_equality_method = true
if (value is null)
    return;

// dotnet_style_prefer_is_null_check_over_reference_equality_method = false
if (object.ReferenceEquals(value, null))
    return;

// dotnet_style_prefer_is_null_check_over_reference_equality_method = false
if ((object)o == null)
    return;

@mandel-macaque
[Code Style] Add some extra style checks focused on nullability.
3bfe8d6 
Added the following new checks:

```csharp
// dotnet_style_coalesce_expression = true
var v = x ?? y;

// dotnet_style_coalesce_expression = false
var v = x != null ? x : y; // or
var v = x == null ? y : x;
```

```csharp
// dotnet_style_null_propagation = true
var v = o?.ToString();

// dotnet_style_null_propagation = false
var v = o == null ? null : o.ToString(); // or
var v = o != null ? o.String() : null;
```

```csharp
// dotnet_style_prefer_is_null_check_over_reference_equality_method = true
if (value is null)
    return;

// dotnet_style_prefer_is_null_check_over_reference_equality_method = false
if (object.ReferenceEquals(value, null))
    return;

// dotnet_style_prefer_is_null_check_over_reference_equality_method = false
if ((object)o == null)
    return;
```
@mandel-macaque
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the format action should do its magic.

mandel-macaque
mandel-macaque commented Mar 17, 2023
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/azp run

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rolfbjarne
rolfbjarne reviewed Mar 17, 2023
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I think you need to set the style like this:

dotnet_style_coalesce_expression = true

because autoformat didn't do anything.

mandel-macaque
mandel-macaque commented Mar 17, 2023
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tj-devel709
tj-devel709 approved these changes Mar 20, 2023
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Interesting!

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@mandel-macaque mandel-macaque merged commit 1681e9f into xamarin:main Jun 22, 2023
@mandel-macaque mandel-macaque deleted the nullability-style branch June 22, 2023 17:31
rolfbjarne pushed a commit that referenced this pull request Jun 26, 2023
@mandel-macaque @rolfbjarne
[Code Style] Add some extra style checks focused on nullability. (#17831
e58789c 
)

Added the following new checks:

```csharp
// dotnet_style_coalesce_expression = true
var v = x ?? y;

// dotnet_style_coalesce_expression = false
var v = x != null ? x : y; // or
var v = x == null ? y : x;
```

```csharp
// dotnet_style_null_propagation = true
var v = o?.ToString();

// dotnet_style_null_propagation = false
var v = o == null ? null : o.ToString(); // or
var v = o != null ? o.String() : null;
```

```csharp
// dotnet_style_prefer_is_null_check_over_reference_equality_method = true
if (value is null)
    return;

// dotnet_style_prefer_is_null_check_over_reference_equality_method = false
if (object.ReferenceEquals(value, null))
    return;

// dotnet_style_prefer_is_null_check_over_reference_equality_method = false
if ((object)o == null)
    return;
```
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Reviewers

@rolfbjarne rolfbjarne rolfbjarne left review comments

@stephen-hawley stephen-hawley stephen-hawley approved these changes

@tj-devel709 tj-devel709 tj-devel709 approved these changes

@haritha-mohan haritha-mohan haritha-mohan approved these changes

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6 participants
@mandel-macaque @vs-mobiletools-engineering-service2 @rolfbjarne @stephen-hawley @tj-devel709 @haritha-mohan