public void Reset()
{
int count = _count;
if (count >= 0)
{
IfStatementSyntax ifStatement;
if (_ifOrElse.IsElse)
{
ifStatement = (IfStatementSyntax)_ifOrElse.Parent;
}
else
{
ifStatement = _ifOrElse.AsIf();
}
count--;
while (count >= 0)
{
ifStatement = (IfStatementSyntax)ifStatement.Parent.Parent;
count--;
}
_ifOrElse = ifStatement;
}
}
public bool MoveNext()
{
if (_count == -1)
{
if (_ifOrElse != default(IfStatementOrElseClause))
{
_count++;
return(true);
}
}
else if (_ifOrElse.IsIf)
{
ElseClauseSyntax elseClause = _ifOrElse.AsIf().Else;
if (elseClause != null)
{
if (elseClause.Statement is IfStatementSyntax nextIf)
{
_ifOrElse = nextIf;
}
else
{
_ifOrElse = elseClause;
}
_count++;
return(true);
}
}
return(false);
}
private static bool IsValueAssignedInLastStatement(IfStatementOrElseClause ifOrElse, ISymbol symbol, SemanticModel semanticModel, CancellationToken cancellationToken)
{
StatementSyntax statement = GetLastStatementOrDefault(ifOrElse.Statement);
ExpressionSyntax left = GetLastAssignmentOrDefault(statement)?.Left;
return(left != null &&
symbol.Equals(semanticModel.GetSymbol(left, cancellationToken)));
}
internal Enumerator(IfStatementSyntax ifStatement)
{
_ifOrElse = ifStatement;
_count = -1;
}
private static bool IsSymbolAssignedInLastStatement(IfStatementOrElseClause ifOrElse, ISymbol symbol, SemanticModel semanticModel, CancellationToken cancellationToken)
{
StatementSyntax statement = GetLastStatementOrDefault(ifOrElse.Statement);
return(IsSymbolAssignedInStatement(symbol, statement, semanticModel, cancellationToken));
}
