private static bool IsNestedFix(SyntaxNode node, SemanticModel semanticModel, ReduceIfNestingOptions options, INamedTypeSymbol taskSymbol, CancellationToken cancellationToken)
{
options |= ReduceIfNestingOptions.AllowNestedFix;
while (node != null)
{
if (node is IfStatementSyntax ifStatement)
{
ReduceIfNestingAnalysis analysis = Analyze(ifStatement, semanticModel, options, taskSymbol, cancellationToken);
if (analysis.Success)
{
return(true);
}
node = analysis.TopNode;
}
if (node is MemberDeclarationSyntax)
{
return(false);
}
if (node is AccessorDeclarationSyntax)
{
return(false);
}
node = node.Parent;
}
Debug.Fail("");
return(false);
}
public override SyntaxNode VisitBlock(BlockSyntax node)
{
if (_statementsInfo.Parent == null &&
node.IsParentKind(SyntaxKind.SwitchSection))
{
return(Rewrite(new StatementListInfo(node)));
}
_statementsInfo = new StatementListInfo(node);
IfStatementSyntax ifStatement = FindFixableIfStatement(_statementsInfo.Statements, _jumpKind);
if (ReduceIfNestingAnalysis.IsFixable(ifStatement))
{
return(Rewrite(_statementsInfo, ifStatement));
}
return(node);
}
private static IfStatementSyntax FindFixableIfStatement(SyntaxList <StatementSyntax> statements, SyntaxKind jumpKind)
{
int i = statements.Count - 1;
while (i >= 0 &&
statements[i].Kind() == SyntaxKind.LocalFunctionStatement)
{
i--;
}
if (i == -1)
{
return(null);
}
if (statements[i] is IfStatementSyntax ifStatement)
{
return(ifStatement);
}
else if (ReduceIfNestingAnalysis.GetJumpKind(statements[i]) == jumpKind)
{
i--;
while (i >= 0 &&
statements[i].Kind() == SyntaxKind.LocalFunctionStatement)
{
i--;
}
if (i == -1)
{
return(null);
}
if (statements[i] is IfStatementSyntax ifStatement2)
{
return(ifStatement2);
}
}
return(null);
}