private static IEnumerable <SwitchSectionSyntax> CreateSwitchSections(IfStatementSyntax ifStatement)
{
foreach (SyntaxNode node in IfElseAnalysis.GetChain(ifStatement))
{
if (node.IsKind(SyntaxKind.IfStatement))
{
ifStatement = (IfStatementSyntax)node;
var condition = ifStatement.Condition as BinaryExpressionSyntax;
List <SwitchLabelSyntax> labels = CreateSwitchLabels(condition, new List <SwitchLabelSyntax>());
labels.Reverse();
SwitchSectionSyntax section = SwitchSection(
List(labels),
AddBreakStatementIfNecessary(ifStatement.Statement));
yield return(section);
}
else
{
var elseClause = (ElseClauseSyntax)node;
yield return(DefaultSwitchSection(AddBreakStatementIfNecessary(elseClause.Statement)));
}
}
}
internal IfElseAnalysisResult(IfStatementSyntax ifStatement)
{
if (ifStatement == null)
{
throw new ArgumentNullException(nameof(ifStatement));
}
bool anyHasEmbedded = false;
bool anyHasBlock = false;
bool allSupportsEmbedded = true;
int cnt = 0;
foreach (SyntaxNode node in IfElseAnalysis.GetChain(ifStatement))
{
cnt++;
StatementSyntax statement = GetStatement(node);
if (!anyHasEmbedded && !statement.IsKind(SyntaxKind.Block))
{
anyHasEmbedded = true;
}
if (!anyHasBlock && statement.IsKind(SyntaxKind.Block))
{
anyHasBlock = true;
}
if (allSupportsEmbedded && !SupportsEmbedded(statement))
{
allSupportsEmbedded = false;
}
if (cnt > 1 && anyHasEmbedded && !allSupportsEmbedded)
{
AddBraces = true;
return;
}
}
if (cnt > 1 &&
allSupportsEmbedded &&
anyHasBlock)
{
RemoveBraces = true;
if (anyHasEmbedded)
{
AddBraces = true;
}
}
}
private static bool CanBeReplacedWithSwitch(IfStatementSyntax ifStatement)
{
foreach (SyntaxNode node in IfElseAnalysis.GetChain(ifStatement))
{
if (node.IsKind(SyntaxKind.IfStatement))
{
ifStatement = (IfStatementSyntax)node;
var condition = ifStatement.Condition as BinaryExpressionSyntax;
if (condition == null ||
!IsValidCondition(condition, null))
{
return(false);
}
}
}
return(true);
}
private static IEnumerable <StatementSyntax> GetEmbeddedStatements(IfStatementSyntax topmostIf)
{
foreach (SyntaxNode node in IfElseAnalysis.GetChain(topmostIf))
{
switch (node.Kind())
{
case SyntaxKind.IfStatement:
{
var ifStatement = (IfStatementSyntax)node;
StatementSyntax statement = ifStatement.Statement;
if (statement?.IsKind(SyntaxKind.Block) == false)
{
yield return(statement);
}
break;
}
case SyntaxKind.ElseClause:
{
var elseClause = (ElseClauseSyntax)node;
StatementSyntax statement = elseClause.Statement;
if (statement?.IsKind(SyntaxKind.Block) == false)
{
yield return(statement);
}
break;
}
}
}
}