public static void Analyze(SyntaxNodeAnalysisContext context, LocalDeclarationStatementSyntax localDeclaration)
{
if (!localDeclaration.IsConst)
{
VariableDeclarationSyntax declaration = localDeclaration.Declaration;
if (declaration != null)
{
SeparatedSyntaxList <VariableDeclaratorSyntax> variables = declaration.Variables;
if (variables.Any())
{
SyntaxList <StatementSyntax> statements = localDeclaration.GetContainingList();
if (statements.Any())
{
int index = statements.IndexOf(localDeclaration);
if (index < statements.Count - 1)
{
StatementSyntax nextStatement = statements[index + 1];
if (nextStatement.IsKind(SyntaxKind.ExpressionStatement))
{
var expressionStatement = (ExpressionStatementSyntax)nextStatement;
ExpressionSyntax expression = expressionStatement.Expression;
if (expression?.IsKind(SyntaxKind.SimpleAssignmentExpression) == true)
{
var assignment = (AssignmentExpressionSyntax)expression;
ExpressionSyntax left = assignment.Left;
if (left.IsKind(SyntaxKind.IdentifierName))
{
ExpressionSyntax right = assignment.Right;
if (right?.IsMissing == false)
{
VariableDeclaratorSyntax declarator = FindInitializedVariable(variables, (IdentifierNameSyntax)left, context.SemanticModel, context.CancellationToken);
if (declarator != null)
{
EqualsValueClauseSyntax initializer = declarator.Initializer;
ExpressionSyntax value = initializer?.Value;
if (value == null ||
IsDefaultValue(declaration.Type, value, context.SemanticModel, context.CancellationToken))
{
TextSpan span = TextSpan.FromBounds(
(value != null) ? value.SpanStart : declarator.Span.End,
right.Span.Start);
if (!localDeclaration.Parent.ContainsDirectives(span))
{
context.ReportDiagnostic(
DiagnosticDescriptors.MergeLocalDeclarationWithInitialization,
declarator.Identifier);
if (value != null)
{
context.ReportNode(FadeOutDescriptor, initializer);
}
context.ReportToken(FadeOutDescriptor, localDeclaration.SemicolonToken);
context.ReportNode(FadeOutDescriptor, left);
if (value != null)
{
context.ReportToken(FadeOutDescriptor, assignment.OperatorToken);
}
}
}
}
}
}
}
}
}
}
}
}
}
}