public override SyntaxNode VisitVariableDeclaration(VariableDeclarationSyntax node)
{
// determination of the type of the variable(s)
var typeSymbol = (ITypeSymbol)this.SemanticModel.GetSymbolInfo(node.Type).Symbol;
bool changed = false;
// you could declare more than one variable with one expression
SeparatedSyntaxList <VariableDeclaratorSyntax> vs = node.Variables;
// we create a space to improve readability
SyntaxTrivia space = SyntaxFactory.SyntaxTrivia(SyntaxKind.WhitespaceTrivia, " ");
for (var i = 0; i < node.Variables.Count; i++)
{
// there is not an initialization
if (this.SemanticModel.GetSymbolInfo(node.Type).Symbol.ToString() == "int" &&
node.Variables[i].Initializer == null)
{
// we create a new espression "42"
// preceded by the space we create earlier
ExpressionSyntax es = SyntaxFactory.ParseExpression("42")
.WithLeadingTrivia(Space);
// basically we create an assignment to the espression we just created
EqualsValueClauseSyntax evc = SyntaxFactory.EqualsValueClause(es)
.WithLeadingTrivia(space);
// we replace the null initializer with ours
vs = vs.Replace(vs.ElementAt(i), vs.ElementAt(i).WithInitializer(evc));
changed = true;
}
// there is an initialization but it's not to 42
if (this.SemanticModel.GetSymbolInfo(node.Type).Symbol.ToString() == "int" &&
node.Variables[i].Initializer != null &&
!node.Variables[i].Initializer.Value.IsEquivalentTo(SyntaxFactory.ParseExpression("42")))
{
ExpressionSyntax es = SyntaxFactory.ParseExpression("42")
.WithLeadingTrivia(Space);
EqualsValueClauseSyntax evc = SyntaxFactory.EqualsValueClause(es);
vs = vs.Replace(vs.ElementAt(i), vs.ElementAt(i).WithInitializer(evc));
changed = true;
}
}
if (changed == true)
{
return(node.WithVariables(vs));
}
return(base.VisitVariableDeclaration(node));
}
private SeparatedSyntaxList <T> PermuteDeclaration <T>(SeparatedSyntaxList <T> list, SignatureChange updatedSignature) where T : SyntaxNode
{
var originalParameters = updatedSignature.OriginalConfiguration.ToListOfParameters();
var reorderedParameters = updatedSignature.UpdatedConfiguration.ToListOfParameters();
var newParameters = new List <T>();
foreach (var newParam in reorderedParameters)
{
var pos = originalParameters.IndexOf(newParam);
var param = list.ElementAt(pos);
newParameters.Add(param);
}
var numSeparatorsToSkip = originalParameters.Count - reorderedParameters.Count;
return(SyntaxFactory.SeparatedList(newParameters, GetSeparators(list, numSeparatorsToSkip)));
}