public static IEnumerable <SyntaxNode> CreateAssignmentStatements(
this ISyntaxFactoryService factory,
IList <IParameterSymbol> parameters,
IDictionary <string, ISymbol> parameterToExistingFieldMap,
IDictionary <string, string> parameterToNewFieldMap)
{
foreach (var parameter in parameters)
{
var refKind = parameter.RefKind;
var parameterType = parameter.Type;
var parameterName = parameter.Name;
if (refKind == RefKind.Out)
{
// If it's an out param, then don't create a field for it. Instead, assign
// assign the default value for that type (i.e. "default(...)") to it.
var assignExpression = factory.CreateAssignExpression(
factory.CreateIdentifierName(parameterName),
factory.CreateDefaultExpression(parameterType));
var statement = factory.CreateExpressionStatement(assignExpression);
yield return(statement);
}
else
{
// For non-out parameters, create a field and assign the parameter to it.
// TODO: I'm not sure that's what we really want for ref parameters.
string fieldName;
if (TryGetValue(parameterToExistingFieldMap, parameterName, out fieldName) ||
TryGetValue(parameterToNewFieldMap, parameterName, out fieldName))
{
var assignExpression = factory.CreateAssignExpression(
factory.CreateMemberAccessExpression(
factory.CreateThisExpression(),
factory.CreateIdentifierName(fieldName)),
factory.CreateIdentifierName(parameterName));
var statement = factory.CreateExpressionStatement(assignExpression);
yield return(statement);
}
}
}
}
