private void AddOperationToTree(CodeElement leftExprCode, CodeElement rightOpCode, CodeElement rightExprCode, List <TextElement> comments)
{
WordBinaryOperator leftOperator = leftExprCode.ParserElement as WordBinaryOperator;
WordBinaryOperator rightOpSymbol = rightOpCode.ParserElement as WordBinaryOperator;
// is the insertpoint a value
// Or the insertPoint is a completed expression (eg parentheses)
if (leftOperator == null ||
(_binaryOperators.Contains(leftOperator) && _completeOperations.Contains(leftExprCode)))
{
// insert
TextElement parent = leftExprCode.Parent;
rightOpCode.Add(leftExprCode);
rightOpCode.Add(rightExprCode);
parent.ReplaceSubElement(leftExprCode, rightOpCode);
rightOpCode.AddRange(comments);
return;
}
// if the insertPoint has higther precedence
if (leftOperator.Precedence > rightOpSymbol.Precedence)
{
// insert
TextElement parent = leftExprCode.Parent;
rightOpCode.Add(leftExprCode);
rightOpCode.Add(rightExprCode);
parent.ReplaceSubElement(leftExprCode, rightOpCode);
rightOpCode.AddRange(comments);
return;
}
// if the insertPoint has lower precedence
if (leftOperator.Precedence < rightOpSymbol.Precedence)
{
AddOperationToTree(leftExprCode.ChildNodes[1] as CodeElement, rightOpCode, rightExprCode, comments);
}
// if the insertPoint has same precedence and operator is rigth associative
else if (rightOpSymbol.RightAssociative)
{
AddOperationToTree(leftExprCode.ChildNodes[1] as CodeElement, rightOpCode, rightExprCode, comments);
}
// if the insertPoint has same precedence and operator is left associative
else
{
// insert
TextElement parent = leftExprCode.Parent;
rightOpCode.Add(leftExprCode);
rightOpCode.Add(rightExprCode);
parent.ReplaceSubElement(leftExprCode, rightOpCode);
rightOpCode.AddRange(comments);
return;
}
}
public override bool Load(List <TextElement> outElements, int level)
{
TextSubString subStr = new TextSubString(TextBuffer.PointerNextChar);
if (Collapse)
{
if (!LoadSet(outElements, level))
{
return(false);
}
}
else
{
var outSubNotes = new List <TextElement>();
TextElement element;
if (!LoadSet(outSubNotes, level))
{
return(false);
}
subStr.To = TextBuffer.PointerNextChar;
// _simplify is true when a rule just contains a single word
// The word value is inserted directly (collapsed)
if (Comment)
{
TextBuffer.InsertComments(outElements);
}
if (_simplify)
{
element = outSubNotes.FirstOrDefault(n => n is CodeElement);
if (element != null)
{
element.Name = Name;
}
else
{
element = new CodeElement(this, subStr);
}
outElements.Add(element);
}
else
{
element = new CodeElement(this, subStr);
element.AddRange(outSubNotes);
outElements.Add(element);
}
}
if (Comment)
{
TextBuffer.FindNextWord(outElements, true);
}
// If this is a 'division' set unambiguous and insert comments
if (Trust && TextBuffer.PointerNextChar > subStr.From && outElements.Count > 0)
{
TextBuffer.Status.ThisIsUnambiguous(this, outElements[outElements.Count - 1]);
}
return(true);
}