private static ConversionOperatorDeclarationSyntax UseExpressionBodyIfDesired(
CodeGenerationOptions options,
ConversionOperatorDeclarationSyntax declaration,
ParseOptions parseOptions
)
{
if (declaration.ExpressionBody == null)
{
var expressionBodyPreference =
options.Options.GetOption(
CSharpCodeStyleOptions.PreferExpressionBodiedOperators
).Value;
if (
declaration.Body.TryConvertToArrowExpressionBody(
declaration.Kind(),
parseOptions,
expressionBodyPreference,
out var expressionBody,
out var semicolonToken
)
)
{
return(declaration
.WithBody(null)
.WithExpressionBody(expressionBody)
.WithSemicolonToken(semicolonToken));
}
}
return(declaration);
}
public static ConversionOperatorDeclarationSyntax ToStatementBody(ConversionOperatorDeclarationSyntax method)
{
var body = method.ExpressionBody.Expression.WithLeadingTrivia(SyntaxFactory.Space);
return(method.WithBody(SyntaxFactory.Block((StatementSyntax)SyntaxFactory.ReturnStatement(body)))
.WithExpressionBody(null)
.WithSemicolonToken(SyntaxFactory.MissingToken(SyntaxKind.SemicolonToken))
.WithTrailingTrivia(method.GetTrailingTrivia()));
}
public override SyntaxNode VisitConversionOperatorDeclaration(ConversionOperatorDeclarationSyntax node)
{
if (node.Body == null)
{
return(node);
}
BlockSyntax block = (BlockSyntax)SyntaxFactory.ParseStatement(GetDefaultMessage());
return(node.WithBody(block));
}
private static ConversionOperatorDeclarationSyntax UseExpressionBodyIfDesired(
CSharpCodeGenerationOptions options, ConversionOperatorDeclarationSyntax declaration)
{
if (declaration.ExpressionBody == null)
{
if (declaration.Body?.TryConvertToArrowExpressionBody(
declaration.Kind(), options.Preferences.LanguageVersion, options.Preferences.PreferExpressionBodiedOperators,
out var expressionBody, out var semicolonToken) == true)
{
return(declaration.WithBody(null)
.WithExpressionBody(expressionBody)
.WithSemicolonToken(semicolonToken));
}
}
return(declaration);
}
private async Task <Document> HandleConversionOperatorDeclaration(ConversionOperatorDeclarationSyntax declaration, Document document, CancellationToken cancellationToken)
{
var returnStatement = SyntaxFactory.ReturnStatement(
returnKeyword: SyntaxFactory.Token(SyntaxKind.ReturnKeyword),
expression: declaration.ExpressionBody.Expression,
semicolonToken: declaration.SemicolonToken);
var newDeclaration = declaration
.WithBody(SyntaxFactory.Block(returnStatement))
.WithExpressionBody(null)
.WithSemicolonToken(default(SyntaxToken))
.WithAdditionalAnnotations(Formatter.Annotation);
var oldRoot = await document.GetSyntaxRootAsync(cancellationToken);
var newRoot = oldRoot.ReplaceNode(declaration, newDeclaration);
return(document.WithSyntaxRoot(newRoot));
}
private static ConversionOperatorDeclarationSyntax UseExpressionBodyIfDesired(
Workspace workspace, ConversionOperatorDeclarationSyntax declaration, ParseOptions options)
{
if (declaration.ExpressionBody == null)
{
var preferExpressionBody = workspace.Options.GetOption(CSharpCodeStyleOptions.PreferExpressionBodiedOperators).Value;
if (preferExpressionBody)
{
if (declaration.Body.TryConvertToExpressionBody(
options, out var expressionBody, out var semicolonToken))
{
return declaration.WithBody(null)
.WithExpressionBody(expressionBody)
.WithSemicolonToken(semicolonToken);
}
}
}
return declaration;
}
private async Task<Document> HandleConversionOperatorDeclaration(ConversionOperatorDeclarationSyntax declaration, Document document, CancellationToken cancellationToken)
{
var returnStatement = SyntaxFactory.ReturnStatement(
returnKeyword: SyntaxFactory.Token(SyntaxKind.ReturnKeyword),
expression: declaration.ExpressionBody.Expression,
semicolonToken: declaration.SemicolonToken);
var newDeclaration = declaration
.WithBody(SyntaxFactory.Block(returnStatement))
.WithExpressionBody(null)
.WithSemicolonToken(default(SyntaxToken))
.WithAdditionalAnnotations(Formatter.Annotation);
var oldRoot = await document.GetSyntaxRootAsync(cancellationToken);
var newRoot = oldRoot.ReplaceNode(declaration, newDeclaration);
return document.WithSyntaxRoot(newRoot);
}
private static ConversionOperatorDeclarationSyntax UseExpressionBodyIfDesired(
Workspace workspace, ConversionOperatorDeclarationSyntax declaration, ParseOptions options)
{
if (declaration.ExpressionBody == null)
{
var preferExpressionBody = workspace.Options.GetOption(CSharpCodeStyleOptions.PreferExpressionBodiedOperators).Value;
if (preferExpressionBody)
{
var expressionBody = declaration.Body.TryConvertToExpressionBody(options);
if (expressionBody != null)
{
return declaration.WithBody(null)
.WithExpressionBody(expressionBody)
.WithSemicolonToken(SyntaxFactory.Token(SyntaxKind.SemicolonToken));
}
}
}
return declaration;
}
