private void NormalizeAndAdd(Ust ust, ref FoldResult result)
{
if (result?.Value is StringBuilder stringBuilder)
{
result = new FoldResult(stringBuilder.ToString(), result.TextSpans);
}
result?.TextSpans.Sort();
foldedResults[ust.TextSpan] = result;
}
private FoldResult ProcessBinaryExpression(BinaryOperatorExpression binaryOperatorExpression,
FoldResult leftFold, FoldResult rightFold, object foldedBinaryValue)
{
var textSpans = leftFold.TextSpans;
if (!(foldedBinaryValue is string || foldedBinaryValue is StringBuilder))
{
textSpans.Add(binaryOperatorExpression.Operator.TextSpan); // FIXME: workaround for correct PatternStringRegexLiteral processing
}
textSpans.AddRange(rightFold.TextSpans);
return(new FoldResult(foldedBinaryValue, leftFold.TextSpans));
}
private FoldResult TryFoldUnaryOperatorExpression(UnaryOperatorExpression unaryOperatorExpression)
{
FoldResult foldResult = TryGetOrFold(unaryOperatorExpression.Expression);
if (foldResult == null)
{
NormalizeAndAdd(unaryOperatorExpression.Expression, ref foldResult);
return(null);
}
if (unaryOperatorExpression.Operator.UnaryOperator == UnaryOperator.Minus)
{
object negativeValue = null;
switch (foldResult.Value)
{
case double doubleVal:
negativeValue = -doubleVal;
break;
case int intVal:
negativeValue = -intVal;
break;
case long longVal:
negativeValue = -longVal;
break;
case BigInteger bigIntVal:
negativeValue = -bigIntVal;
break;
}
if (negativeValue != null)
{
return(ProcessUnaryExpression(unaryOperatorExpression, foldResult, negativeValue));
}
}
return(null);
}
public bool TryGetOrFold(Ust ust, out FoldResult result)
{
if (ust == null || !foldingTypes.Contains(ust.GetType()))
{
result = null;
return(false);
}
lock (ust)
{
if (foldedResults.TryGetValue(ust.TextSpan, out result))
{
return(result != null);
}
result = TryGetOrFold(ust);
NormalizeAndAdd(ust, ref result);
}
return(result != null);
}
private FoldResult ProcessUnaryExpression(UnaryOperatorExpression unaryOperatorExpression, FoldResult foldResult,
object resultValue)
{
var textSpans = foldResult.TextSpans;
textSpans.Add(unaryOperatorExpression.Operator.TextSpan);
return(new FoldResult(resultValue, textSpans));
}
private FoldResult TryFoldBinaryOperatorExpression(BinaryOperatorExpression binaryOperatorExpression)
{
FoldResult leftFold = TryGetOrFold(binaryOperatorExpression.Left);
if (leftFold == null)
{
NormalizeAndAdd(binaryOperatorExpression.Left, ref leftFold);
return(null);
}
FoldResult rightFold = TryGetOrFold(binaryOperatorExpression.Right);
if (rightFold == null)
{
NormalizeAndAdd(binaryOperatorExpression.Right, ref rightFold);
return(null);
}
object leftValue = leftFold.Value;
object rightValue = rightFold.Value;
BinaryOperatorLiteral op = binaryOperatorExpression.Operator;
if (leftValue is string || leftValue is StringBuilder)
{
if (op.BinaryOperator == BinaryOperator.Plus || op.BinaryOperator == BinaryOperator.Concat)
{
// Use StringBuilder instead of immutable strings and concatenation
string rightString = rightValue.ToString();
StringBuilder leftStringBuilder;
if (leftValue is string leftString)
{
leftStringBuilder = new StringBuilder((leftString.Length + rightString.Length) * 2);
leftStringBuilder.Append(leftString);
}
else
{
leftStringBuilder = (StringBuilder)leftValue;
}
leftStringBuilder.Append(rightString);
FoldResult result = ProcessBinaryExpression(binaryOperatorExpression, leftFold, rightFold, leftStringBuilder);
if (Logger.IsLogDebugs)
{
Logger.LogDebug(
$"Strings {binaryOperatorExpression} concatenated to \"{leftStringBuilder}\" at {binaryOperatorExpression.TextSpan}");
}
return(result);
}
}
else
{
if (TryFoldIntBinaryOperatorExpression(leftValue, rightValue, op, out BigInteger bigInt))
{
FoldResult result = ProcessBinaryExpression(binaryOperatorExpression, leftFold, rightFold, bigInt);
if (Logger.IsLogDebugs)
{
Logger.LogDebug($"Arithmetic expression {binaryOperatorExpression} folded to {bigInt} at {binaryOperatorExpression.TextSpan}");
}
return(result);
}
}
return(null);
}