public static async Task ComputeRefactoringAsync(RefactoringContext context, LocalDeclarationStatementSyntax localDeclaration)
{
SyntaxNode method = localDeclaration.GetContainingMethod();
if (method?.IsKind(SyntaxKind.MethodDeclaration) == true)
{
VariableDeclarationSyntax declaration = localDeclaration.Declaration;
if (declaration != null)
{
VariableDeclaratorSyntax variable = declaration
.Variables
.FirstOrDefault(f => !f.IsMissing && f.Identifier.Span.Contains(context.Span));
if (variable != null)
{
TypeSyntax type = declaration.Type;
if (type != null)
{
if (type.IsVar)
{
SemanticModel semanticModel = await context.GetSemanticModelAsync().ConfigureAwait(false);
ITypeSymbol typeSymbol = semanticModel.GetTypeInfo(type, context.CancellationToken).Type;
if (typeSymbol?.SupportsExplicitDeclaration() == true)
{
type = Type(typeSymbol);
}
else
{
type = null;
}
}
if (type != null)
{
context.RegisterRefactoring(
$"Promote '{variable.Identifier.ValueText}' to parameter",
cancellationToken =>
{
return(RefactorAsync(
context.Document,
(MethodDeclarationSyntax)method,
localDeclaration,
type.WithoutTrivia(),
variable,
cancellationToken));
});
}
}
}
}
}
}
