SyntaxNode ConvertToVar(VariableDeclarationSyntax node)
{
if (node.Parent is LocalDeclarationStatementSyntax == false)
{
return(null);
}
if ((node.Parent as LocalDeclarationStatementSyntax).IsConst)
{
return(null);
}
if (node.Type is IdentifierNameSyntax varIdentifierNameSyntax)
{
if (varIdentifierNameSyntax.Identifier.ValueText == VarKeyword)
{
return(null);
}
}
if (node.Variables.Count > 1)
{
return(null);
}
var variable = node.Variables.FirstOrDefault();
if (variable.Initializer == null)
{
return(null);
}
var typeOfInitializer = SemanticModel.GetTypeInfo(variable.Initializer.Value);
var typeOfTypeDef = SemanticModel.GetTypeInfo(node.Type);
if (typeOfInitializer.Type?.Name == typeOfTypeDef.Type?.Name)
{
if (isReportOnlyMode)
{
var lineSpan = node.GetFileLinePosSpan();
AddReport(new ChangesReport(node)
{
LineNumber = lineSpan.StartLinePosition.Line,
Column = lineSpan.StartLinePosition.Character,
Message = "Should Convert To Var",
Generator = nameof(SimplifyVariableDeclarations)
});
}
node =
node
.WithType(
SyntaxFactory.ParseTypeName(VarKeyword)
.WithTrailingTrivia(SyntaxFactory.Space)
.WithLeadingTrivia(node.Type.GetLeadingTrivia())
);
}
return(base.VisitVariableDeclaration(node));
}