public static SubExpression GetVariableProductSubExpression(this Expression source, IVariable variable)
{
List <IToken> collection = new List <IToken>();
collection.Add(variable);
IToken current = variable;
IToken left = Token.None;
while (true)
{
left = source.LeftOfToken(current);
current = source.LeftOfToken(left);
if (current.Equals(Token.None) || left.Contents != "*")
{
break;
}
collection.Insert(0, left);
collection.Insert(0, current);
}
current = variable;
IToken right = Token.None;
while (true)
{
right = source.RightOfToken(variable);
current = source.RightOfToken(right);
if (current.Equals(Token.None) || right.Contents != "*")
{
break;
}
collection.Add(right);
collection.Add(current);
}
SubExpression result = new SubExpression(collection.ToArray());
int start = source.IndexOf(collection.First());
int count = collection.Count;
source.RemoveRange(start, count);
source.InsertRange(start, result);
return(result);
}
public virtual IToken yywrap()
{
IToken t = lex();
if (t == null || t.Equals(Yytoken.EOF))
{
return(null);
}
t.Text = yytext();
if (t.Length == 0)
{
return(null);
}
t.Location = new Location(0, yychar, 0, yychar + yylength());
if (t.Class == TokenClass.Error)
{
t.Location.Error = true;
yylval = (Token)t;
yyerror(string.Format("Unexpected '{0}'", YYCHAR));
}
return(t);
}
protected virtual void ExtractInformationFromTreeNodeStream(IIntStream input)
{
ITokenStreamInformation streamInformation = input as ITokenStreamInformation;
if (streamInformation != null)
{
IToken lastToken = streamInformation.LastToken;
IToken lastRealToken = streamInformation.LastRealToken;
if (lastRealToken != null)
{
this._token = lastRealToken;
this._line = lastRealToken.Line;
this._charPositionInLine = lastRealToken.CharPositionInLine;
this._approximateLineInfo = lastRealToken.Equals(lastToken);
}
}
else
{
ITreeNodeStream nodes = (ITreeNodeStream)input;
this._node = nodes.LT(1);
ITreeAdaptor adaptor = nodes.TreeAdaptor;
IToken payload = adaptor.GetToken(_node);
if (payload != null)
{
this._token = payload;
if (payload.Line <= 0)
{
// imaginary node; no line/pos info; scan backwards
int i = -1;
object priorNode = nodes.LT(i);
while (priorNode != null)
{
IToken priorPayload = adaptor.GetToken(priorNode);
if (priorPayload != null && priorPayload.Line > 0)
{
// we found the most recent real line / pos info
this._line = priorPayload.Line;
this._charPositionInLine = priorPayload.CharPositionInLine;
this._approximateLineInfo = true;
break;
}
--i;
priorNode = nodes.LT(i);
}
}
else
{ // node created from real token
this._line = payload.Line;
this._charPositionInLine = payload.CharPositionInLine;
}
}
else if (this._node is Tree.ITree)
{
this._line = ((Tree.ITree) this._node).Line;
this._charPositionInLine = ((Tree.ITree) this._node).CharPositionInLine;
if (this._node is CommonTree)
{
this._token = ((CommonTree)this._node).Token;
}
}
else
{
int type = adaptor.GetType(this._node);
string text = adaptor.GetText(this._node);
this._token = new CommonToken(type, text);
}
}
}
protected virtual void ExtractInformationFromTreeNodeStream(IIntStream input)
{
ITokenStreamInformation tokenStreamInformation = input as ITokenStreamInformation;
if (tokenStreamInformation != null)
{
IToken lastToken = tokenStreamInformation.LastToken;
IToken lastRealToken = tokenStreamInformation.LastRealToken;
if (lastRealToken != null)
{
this._token = lastRealToken;
this._line = lastRealToken.Line;
this._charPositionInLine = lastRealToken.CharPositionInLine;
this._approximateLineInfo = lastRealToken.Equals(lastToken);
}
}
else
{
ITreeNodeStream treeNodeStream = (ITreeNodeStream)input;
this._node = treeNodeStream.LT(1);
ITreeAdaptor treeAdaptor = treeNodeStream.TreeAdaptor;
IToken token = treeAdaptor.GetToken(this._node);
if (token != null)
{
this._token = token;
if (token.Line <= 0)
{
int num = -1;
object obj = treeNodeStream.LT(num);
IToken token2;
while (true)
{
if (obj != null)
{
token2 = treeAdaptor.GetToken(obj);
if (token2 != null && token2.Line > 0)
{
break;
}
num--;
obj = treeNodeStream.LT(num);
continue;
}
return;
}
this._line = token2.Line;
this._charPositionInLine = token2.CharPositionInLine;
this._approximateLineInfo = true;
}
else
{
this._line = token.Line;
this._charPositionInLine = token.CharPositionInLine;
}
}
else if (this._node is ITree)
{
this._line = ((ITree)this._node).Line;
this._charPositionInLine = ((ITree)this._node).CharPositionInLine;
if (this._node is CommonTree)
{
this._token = ((CommonTree)this._node).Token;
}
}
else
{
int type = treeAdaptor.GetType(this._node);
string text = treeAdaptor.GetText(this._node);
this._token = new CommonToken(type, text);
}
}
}
protected virtual void ExtractInformationFromTreeNodeStream(ITreeNodeStream input)
{
this._node = input.LT(1);
object positionNode = null;
IPositionTrackingStream positionTrackingStream = input as IPositionTrackingStream;
if (positionTrackingStream != null)
{
positionNode = positionTrackingStream.GetKnownPositionElement(false);
if (positionNode == null)
{
positionNode = positionTrackingStream.GetKnownPositionElement(true);
this._approximateLineInfo = positionNode != null;
}
}
ITokenStreamInformation streamInformation = input as ITokenStreamInformation;
if (streamInformation != null)
{
IToken lastToken = streamInformation.LastToken;
IToken lastRealToken = streamInformation.LastRealToken;
if (lastRealToken != null)
{
this._token = lastRealToken;
this._line = lastRealToken.Line;
this._charPositionInLine = lastRealToken.CharPositionInLine;
this._approximateLineInfo = lastRealToken.Equals(lastToken);
}
}
else
{
ITreeAdaptor adaptor = input.TreeAdaptor;
IToken payload = adaptor.GetToken(positionNode ?? _node);
if (payload != null)
{
this._token = payload;
if (payload.Line <= 0)
{
// imaginary node; no line/pos info; scan backwards
int i = -1;
object priorNode = input.LT(i);
while (priorNode != null)
{
IToken priorPayload = adaptor.GetToken(priorNode);
if (priorPayload != null && priorPayload.Line > 0)
{
// we found the most recent real line / pos info
this._line = priorPayload.Line;
this._charPositionInLine = priorPayload.CharPositionInLine;
this._approximateLineInfo = true;
break;
}
--i;
try
{
priorNode = input.LT(i);
}
catch (NotSupportedException)
{
priorNode = null;
}
}
}
else
{
// node created from real token
this._line = payload.Line;
this._charPositionInLine = payload.CharPositionInLine;
}
}
else if (this._node is Tree.ITree)
{
this._line = ((Tree.ITree) this._node).Line;
this._charPositionInLine = ((Tree.ITree) this._node).CharPositionInLine;
if (this._node is CommonTree)
{
this._token = ((CommonTree)this._node).Token;
}
}
else
{
int type = adaptor.GetType(this._node);
string text = adaptor.GetText(this._node);
this._token = new CommonToken(type, text);
}
}
}
protected virtual void ExtractInformationFromTreeNodeStream(ITreeNodeStream input)
{
this._node = input.LT(1);
ITokenStreamInformation streamInformation = input as ITokenStreamInformation;
if (streamInformation != null)
{
IToken lastToken = streamInformation.LastToken;
IToken lastRealToken = streamInformation.LastRealToken;
if (lastRealToken == null)
{
return;
}
this._token = lastRealToken;
this._line = lastRealToken.Line;
this._charPositionInLine = lastRealToken.CharPositionInLine;
this._approximateLineInfo = lastRealToken.Equals((object)lastToken);
}
else
{
ITreeAdaptor treeAdaptor = input.TreeAdaptor;
IToken token1 = treeAdaptor.GetToken(this._node);
if (token1 != null)
{
this._token = token1;
if (token1.Line <= 0)
{
int k = -1;
object t = input.LT(k);
while (t != null)
{
IToken token2 = treeAdaptor.GetToken(t);
if (token2 != null && token2.Line > 0)
{
this._line = token2.Line;
this._charPositionInLine = token2.CharPositionInLine;
this._approximateLineInfo = true;
break;
}
--k;
try
{
t = input.LT(k);
}
catch (ArgumentException ex)
{
t = (object)null;
}
}
}
else
{
this._line = token1.Line;
this._charPositionInLine = token1.CharPositionInLine;
}
}
else if (this._node is ITree)
{
this._line = ((ITree)this._node).Line;
this._charPositionInLine = ((ITree)this._node).CharPositionInLine;
if (!(this._node is CommonTree))
{
return;
}
this._token = ((CommonTree)this._node).Token;
}
else
{
this._token = (IToken) new CommonToken(treeAdaptor.GetType(this._node), treeAdaptor.GetText(this._node));
}
}
}
