private string EvaluateToString(TNodeOrToken node, ISyntaxFilterExpression expression)
{
switch (expression)
{
case SyntaxQuery query: {
var first = QueryAll(node, query).FirstOrDefault();
return(EvaluateToString(first));
}
case SyntaxFilterLiteralExpression literal:
return(literal.Value);
default:
throw new NotSupportedException($"Expression canno be evaluated to a single value: {expression}.");
}
}
private bool MatchesFilter(TNodeOrToken node, ISyntaxFilterExpression filter)
{
if (filter == null)
{
return(true);
}
switch (filter)
{
case SyntaxQuery query:
return(QueryAll(node, query).Any());
case SyntaxFilterBinaryExpression binary:
return(MatchesFilterBinary(node, binary));
default:
throw new NotSupportedException($"Unknown filter type: {filter.GetType()}.");
}
}
private string EvaluateToString(SyntaxNodeOrToken nodeOrToken, ISyntaxFilterExpression expression)
{
switch (expression)
{
case SyntaxQuery query: {
var node = nodeOrToken.AsNode();
if (node == null)
{
return(null); // TODO?
}
var first = QueryAll((CSharpSyntaxNode)node, query).FirstOrDefault();
return(EvaluateToString(first));
}
case SyntaxFilterLiteralExpression literal:
return(literal.Value);
default:
throw new NotSupportedException($"Expression canno be evaluated to a single value: {expression}.");
}
}
private bool MatchesFilter(SyntaxNodeOrToken nodeOrToken, ISyntaxFilterExpression filter)
{
if (filter == null)
{
return(true);
}
switch (filter)
{
case SyntaxQuery query: {
var node = nodeOrToken.AsNode();
if (node == null)
{
return(false); // TODO?
}
return(QueryAll((CSharpSyntaxNode)node, query).Any());
}
case SyntaxFilterBinaryExpression binary:
return(MatchesFilterBinary(nodeOrToken, binary));
default:
throw new NotSupportedException($"Unknown filter type: {filter.GetType()}.");
}
}
public SyntaxFilterBinaryExpression(ISyntaxFilterExpression left, SyntaxFilterBinaryOperator @operator, ISyntaxFilterExpression right)
{
Left = left;
Operator = @operator;
Right = right;
}
public SyntaxQuery(SyntaxQueryAxis axis, SyntaxQueryKeyword keyword, ISyntaxFilterExpression filter)
{
Axis = axis;
Keyword = keyword;
Filter = filter;
}
