feat: integrate switch patterns and C# 14 extensions for v0.8.0 - #58

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/cache@v4, actions/checkout@v4, actions/setup-dotnet@v4, actions/upload-artifact@v4. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

Converting null literal or possible null value to non-nullable type.

Converting null literal or possible null value to non-nullable type.

The switch expression does not handle all possible values of its input type (it is not exhaustive). For example, the pattern '0' is not covered.

Expression generation for 'NonExhaustive' skipped: unsupported or non-exhaustive switch pattern 'value switch { 1 => 1 }'

Converting null literal or possible null value to non-nullable type.

Converting null literal or possible null value to non-nullable type.

Converting null literal or possible null value to non-nullable type.

Converting null literal or possible null value to non-nullable type.

The switch expression does not handle all possible values of its input type (it is not exhaustive). For example, the pattern '0' is not covered.

Expression generation for 'NonExhaustive' skipped: unsupported or non-exhaustive switch pattern 'value switch { 1 => 1 }'

Converting null literal or possible null value to non-nullable type.

Converting null literal or possible null value to non-nullable type.

Possible null reference argument for parameter 'left' in 'AssignmentExpressionSyntax AssignmentExpressionSyntax.WithLeft(ExpressionSyntax left)'.

Converting null literal or possible null value to non-nullable type.

Possible null reference argument for parameter 'right' in 'BinaryExpressionSyntax SyntaxFactory.BinaryExpression(SyntaxKind kind, ExpressionSyntax left, SyntaxToken operatorToken, ExpressionSyntax right)'.

Possible null reference argument for parameter 'left' in 'BinaryExpressionSyntax SyntaxFactory.BinaryExpression(SyntaxKind kind, ExpressionSyntax left, SyntaxToken operatorToken, ExpressionSyntax right)'.

The type 'Microsoft.CodeAnalysis.CSharp.Syntax.ExpressionSyntax?' cannot be used as type parameter 'TSyntax' in the generic type or method 'SyntaxNodeExtensions.WithoutTrivia<TSyntax>(TSyntax)'. Nullability of type argument 'Microsoft.CodeAnalysis.CSharp.Syntax.ExpressionSyntax?' doesn't match constraint type 'Microsoft.CodeAnalysis.SyntaxNode'.

The type 'Microsoft.CodeAnalysis.CSharp.Syntax.ExpressionSyntax?' cannot be used as type parameter 'TSyntax' in the generic type or method 'SyntaxNodeExtensions.WithoutTrivia<TSyntax>(TSyntax)'. Nullability of type argument 'Microsoft.CodeAnalysis.CSharp.Syntax.ExpressionSyntax?' doesn't match constraint type 'Microsoft.CodeAnalysis.SyntaxNode'.

Converting null literal or possible null value to non-nullable type.

Converting null literal or possible null value to non-nullable type.

Converting null literal or possible null value to non-nullable type.

Converting null literal or possible null value to non-nullable type.

Possible null reference argument for parameter 'left' in 'AssignmentExpressionSyntax AssignmentExpressionSyntax.WithLeft(ExpressionSyntax left)'.

Converting null literal or possible null value to non-nullable type.

Possible null reference argument for parameter 'right' in 'BinaryExpressionSyntax SyntaxFactory.BinaryExpression(SyntaxKind kind, ExpressionSyntax left, SyntaxToken operatorToken, ExpressionSyntax right)'.

Possible null reference argument for parameter 'left' in 'BinaryExpressionSyntax SyntaxFactory.BinaryExpression(SyntaxKind kind, ExpressionSyntax left, SyntaxToken operatorToken, ExpressionSyntax right)'.

The type 'Microsoft.CodeAnalysis.CSharp.Syntax.ExpressionSyntax?' cannot be used as type parameter 'TSyntax' in the generic type or method 'SyntaxNodeExtensions.WithoutTrivia<TSyntax>(TSyntax)'. Nullability of type argument 'Microsoft.CodeAnalysis.CSharp.Syntax.ExpressionSyntax?' doesn't match constraint type 'Microsoft.CodeAnalysis.SyntaxNode'.

The type 'Microsoft.CodeAnalysis.CSharp.Syntax.ExpressionSyntax?' cannot be used as type parameter 'TSyntax' in the generic type or method 'SyntaxNodeExtensions.WithoutTrivia<TSyntax>(TSyntax)'. Nullability of type argument 'Microsoft.CodeAnalysis.CSharp.Syntax.ExpressionSyntax?' doesn't match constraint type 'Microsoft.CodeAnalysis.SyntaxNode'.

Converting null literal or possible null value to non-nullable type.

Converting null literal or possible null value to non-nullable type.