private static ImmutableArray <IfRefactoring> ToImmutableArray(IfRefactoring refactoring1, IfRefactoring refactoring2)
{
if (refactoring1 != null)
{
if (refactoring2 != null)
{
return(ImmutableArray.Create(refactoring1, refactoring2));
}
else
{
return(refactoring1.ToImmutableArray());
}
}
else if (refactoring2 != null)
{
return(refactoring2.ToImmutableArray());
}
return(ImmutableArray <IfRefactoring> .Empty);
}
private static ImmutableArray <IfRefactoring> Analyze(
IfStatementSyntax ifStatement,
ExpressionSyntax condition,
ExpressionStatementSyntax expressionStatement1,
ExpressionStatementSyntax expressionStatement2,
SemanticModel semanticModel,
CancellationToken cancellationToken,
IfAnalysisOptions options)
{
ExpressionSyntax expression1 = expressionStatement1.Expression;
if (IsSimpleAssignment(expression1))
{
ExpressionSyntax expression2 = expressionStatement2.Expression;
if (IsSimpleAssignment(expression2))
{
var assignment1 = (AssignmentExpressionSyntax)expression1;
var assignment2 = (AssignmentExpressionSyntax)expression2;
ExpressionSyntax left1 = assignment1.Left;
ExpressionSyntax right1 = assignment1.Right;
if (left1?.IsMissing == false &&
right1?.IsMissing == false)
{
ExpressionSyntax left2 = assignment2.Left;
ExpressionSyntax right2 = assignment2.Right;
if (left2?.IsMissing == false &&
right2?.IsMissing == false &&
SyntaxComparer.AreEquivalent(left1, left2))
{
if (options.UseCoalesceExpression)
{
NullCheckExpression nullCheck;
if (NullCheckExpression.TryCreate(condition, semanticModel, out nullCheck, cancellationToken))
{
IfRefactoring refactoring = CreateIfToAssignmentWithWithCoalesceExpression(
ifStatement,
left1,
(nullCheck.IsCheckingNull) ? right2 : right1,
(nullCheck.IsCheckingNull) ? right1 : right2,
nullCheck,
semanticModel,
cancellationToken);
if (refactoring != null)
{
return(refactoring.ToImmutableArray());
}
}
}
if (options.UseConditionalExpression)
{
return(new IfElseToAssignmentWithConditionalExpression(ifStatement, left1, right1, right2).ToImmutableArray());
}
}
}
}
}
return(ImmutableArray <IfRefactoring> .Empty);
}