private void insertComment(ParserRuleReturnScope rule, Boolean newlineBefore, Boolean newlineAfter)
{
insertComment(rule, newlineBefore, newlineAfter, 1);
}
private void insertComment(ParserRuleReturnScope rule)
{
insertComment(rule, false, false, 0);
}
public static int getLastTreePosition(ParserRuleReturnScope tree)
{
if (tree.Tree==null)
{
if (tree.Stop!=null && tree.Stop is CommonToken)
{
return ((CommonToken)tree.Stop).StopIndex+1; //this is necessary for implicit semicolon cases. You will get an extra CR here
}
return -1;
}
return getLastTreePosition((CommonTree)tree.Tree);
}
/// <summary>
/// Insert a comment in the passed String builder
/// </summary>
/// <param name="tree"></param>
private void insertComment(ParserRuleReturnScope rule, Boolean newlineBefore, Boolean newlineAfter, int carriageReturns)
{
CommonTree tree;
CommonTree comment;
if(rule != null)
{
tree = (CommonTree)rule.Tree; // COMMENT_LIST
for(int i = 0; i < tree.ChildCount; i++)
{
if(newlineBefore && i == 0)
{
for(int n = 0; n < carriageReturns; n++)
{
buffer.Append(NewLine + tab);
}
}
comment = (CommonTree)tree.GetChild(i); // COMMENT_ENTRY
if(comment.GetChild(0).Type == ASLexer.MULTILINE_COMMENT)
{
string[] lines = lineSplitterReg.Split(comment.GetChild(0).GetChild(0).Text);
int k = 0;
foreach (string line in lines)
{
buffer.Append((k > 0 ? " " : "") + line.Trim() + (k < lines.Length-1 ? NewLine + tab : ""));
k++;
}
} else {
buffer.Append(comment.GetChild(0).GetChild(0).Text.TrimEnd());
}
if(i < tree.ChildCount - 1 || newlineAfter)
buffer.Append(NewLine + tab);
}
}
}
public static List<IToken> getHiddenTokens(ParserRuleReturnScope tree, CommonTokenStream rawTokens, bool crossLineBoundaries)
{
return getHiddenTokens(getFirstTreeToken((CommonTree)tree.Tree), rawTokens, crossLineBoundaries, false);
}
public static int getFirstTreePosition(ParserRuleReturnScope tree)
{
return getFirstTreePosition((CommonTree)tree.Tree);
}
public static String getTreeText(ParserRuleReturnScope tree)
{
return getCommonTreeText((CommonTree)tree.Tree);
}
public static List<IToken> getPostHiddenTokens(ParserRuleReturnScope tree, CommonTokenStream rawTokens)
{
if (tree.Tree==null)
{
//I think this only happens with implied semicolons
if (tree.Start is CommonToken && tree.Start!=null)
{
//I think we should always be on at least token 1.
IToken currentTok=rawTokens.Get(((CommonToken)tree.Start).TokenIndex);
//I go back one token if I am on a non-default channel token so that I can search forward for hidden tokens.
if (currentTok.Channel!=Token.DEFAULT_CHANNEL)
currentTok=rawTokens.Get(((CommonToken)tree.Start).TokenIndex-1);
return getPostHiddenTokens(currentTok, rawTokens);
}
return null;
}
return getPostHiddenTokens(getLastTreeToken((CommonTree)tree.Tree), rawTokens);
}
public bool FindVirtualHiddenToken(ParserRuleReturnScope retval)
{
int index = ((CommonToken) retval.Start).TokenIndex;
if(index<0){
index = input.Count;
}
for (int ix = index - 1; ix >= 0; ix--){
CommonToken lt = (CommonToken) input.Get(ix);
int type = lt.Type;
if(lt.Channel == Token.DEFAULT_CHANNEL)
break;
if (type == EOL || type==COMMENT_SINGLELINE || (type == COMMENT_MULTILINE && Regex.Match(lt.Text,"/.*\r\n|\r|\n").Success))
{
retval.Start=lt;
return true;
}
}
return false;
}
/// <summary>
/// This method handles promotion of an EOL token to on channel in situations where the ECMA 3 specification
/// states there should be a semicolon inserted because of an EOL between the current (offending) token
/// and the previous token.
/// So an semicolon is not actually inserted but the EOL present is switched from off to on channel. In this
/// way that EOL gets the notion of an "virtual" semicolon.
/// As a side effect a given rule's return scope starting point is set to the found EOL and the input stream is repositioned on it.
/// A multi line comment with an EOL is also promoted.
/// </summary>
/// <param name="rule">The invoking rule's return scope</param>
public void PromoteEOL(ParserRuleReturnScope<IToken> rule)
{
// Get current token and its type (the possibly offending token).
IToken lt = input.LT(1);
int la = lt.Type;
// We only need to promote an EOL when the current token is offending (not a SEMIC, EOF, RBRACE or EOL).
// Promoting an EOL means switching it from off channel to on channel.
if (!(la == SEMIC || la == EOF || la == RBRACE || la == EOL))
{
// Start on the possition before the current token and scan backwards off channel tokens until the previous on channel token.
for (int ix = lt.TokenIndex - 1; ix > 0; ix--)
{
lt = input.Get(ix);
if (lt.Channel == DefaultTokenChannel)
{
// On channel token found: stop scanning.
break;
}
else if (lt.Type == EOL || (lt.Type == MultiLineComment && Regex.IsMatch(lt.Text, "/.*\r\n|\r|\n")))
{
// We found our EOL: promote it to on channel, position the input on it and reset the rule start.
lt.Channel = DefaultTokenChannel;
input.Seek(lt.TokenIndex);
if (rule != null)
{
rule.Start = lt;
}
break;
}
}
}
}
private void PromoteEOL(ParserRuleReturnScope rule)
{
// Get current token and its type (the possibly offending token).
IToken lt = input.LT(1);
int la = lt.Type;
// We only need to promote an EOL when the current token is offending (not a SEMIC, EOF, RBRACE, EOL or MultiLineComment).
// EOL and MultiLineComment are not offending as they're already promoted in a previous call to this method.
// Promoting an EOL means switching it from off channel to on channel.
// A MultiLineComment gets promoted when it contains an EOL.
if (!(la == SEMIC || la == EOF || la == RBRACE || la == EOL || la == MultiLineComment))
{
// Start on the possition before the current token and scan backwards off channel tokens until the previous on channel token.
for (int ix = lt.TokenIndex - 1; ix > 0; ix--)
{
lt = input.Get(ix);
if (lt.Channel == Token.DEFAULT_CHANNEL)
{
// On channel token found: stop scanning.
break;
}
else if (lt.Type == EOL || (lt.Type == MultiLineComment && (lt.Text.EndsWith("\r") || lt.Text.EndsWith("\n"))))
{
// We found our EOL: promote the token to on channel, position the input on it and reset the rule start.
lt.Channel = Token.DEFAULT_CHANNEL;
input.Seek(lt.TokenIndex);
if (rule != null)
{
rule.Start = lt;
}
break;
}
}
}
}
public bool findVirtualHiddenToken(ParserRuleReturnScope retval)
{
//the point of this method is to look for something that can serve as a semicolon. So a carriage return
//or a comment containing a carriage return will fit the bill.
int index = ((IToken)retval.Start).TokenIndex;
if(index<0){
index = input.Count;
}
else
{
IToken lt=input.Get(index);
if (lt.Type==EOF || lt.Type==SEMI || lt.Type==RCURLY)
return false;
}
/* //we are on the next regular channel token after the rule. So we walk backward to determine if between
//the rule and this token is a single line comment, multiline comment, or new line that can serve as the
//end token. If so, then we 'promote' that token by returning it as the 'end' token of the rule (in place
//of the semi colon).
for (int ix = index - 1; ix >= 0; ix--){
IToken lt = input.Get(ix);
int type = lt.Type;
if(lt.Channel == Token.DEFAULT_CHANNEL)
break;
if (type == EOL || type==COMMENT_SINGLELINE || (type == COMMENT_MULTILINE && Regex.Matches(lt.Text, "/.*\r\n|\r|\n").Count > 0))
{
retval.Start=lt;
return true;
}
}*/
//the token index is pointing to the next default channel token, which is not what we want.
//We want to walk backward to the previous default channel token (first loop), and then walk forward
//again looking for EOL/comments (2nd loop)
int ix=index-1;
for (; ix >= 0; ix--){
IToken lt = input.Get(ix);
if(lt.Channel == Token.DEFAULT_CHANNEL)
break;
}
//walk forward again
ix++; //to move to next token that's not default channel
for (;ix<input.Count;ix++) //now search for the next "statement ender"
{
IToken lt = input.Get(ix);
int type = lt.Type;
if (lt.Channel == Token.DEFAULT_CHANNEL)
break;
if (type == EOL || type==COMMENT_SINGLELINE || (type == COMMENT_MULTILINE && Regex.Matches(lt.Text, "/.*\r\n|\r|\n").Count > 0))
{
retval.Start=lt;
return true;
}
}
return false;
}
public static void IsVarAValidOneForExpression(ParserRuleReturnScope<IToken> expression, CommonTree tree, Dictionary<string, CommonTree> DeclarationDatabase)
{
bool invalid = false;
if (tree != null)
{
if (tree.Text == "VAR_NODE")
{
if (DeclarationDatabase.ContainsKey(tree.GetChild(0).Text))
{
IsVarAValidOneForExpression(expression, DeclarationDatabase[tree.GetChild(0).Text], DeclarationDatabase);
}
else
{
invalid = true;
}
}
else if (tree.Text == "BLOCK_NODE")
{
foreach (CommonTree statement in tree.Children)
{
IsVarAValidOneForExpression(expression, statement, DeclarationDatabase);
}
}
else if (tree.Text == "CALL_NODE")
{
string key = tree.GetChild(1).Text + (tree.ChildCount - 2);
if (DeclarationDatabase.ContainsKey(key))
{
IsVarAValidOneForExpression(expression, DeclarationDatabase[key], DeclarationDatabase);
}
}
else if (tree.Text == "if")
{
IsVarAValidOneForExpression(expression, tree.GetChild(1) as CommonTree, DeclarationDatabase);
IsVarAValidOneForExpression(expression, tree.GetChild(2) as CommonTree, DeclarationDatabase);
}
else if (tree.Text == "while")
{
IsVarAValidOneForExpression(expression, tree.GetChild(1) as CommonTree, DeclarationDatabase);
}
else if (!ExpressionList.Contains(tree.Text))
{
invalid = true;
}
else if (tree.Text == "CLASS_CALL_NODE" && tree.ChildCount == 2)
{
if (tree.GetChild(1).Text == "FIELDS_CALL_NODE")
{
invalid = true;
}
}
}
if (invalid)
{
if (tree.Token.TokenIndex == -1)
{
throw new ParsingException("Only assignment, call, if, while, local variable declaration, new object creation and object method call can be used as a statement", expression.Start as IToken);
}
else
{
throw new ParsingException("Only assignment, call, if, while, local variable declaration, new object creation and object method call can be used as a statement", tree.Token);
}
}
return;
}
public static void IsStateAValidOneForExpression(ParserRuleReturnScope<IToken> expression, CommonTree tree)
{
bool invalid = false;
if (tree != null)
{
if (!ExpressionList.Contains(tree.Text))
{
invalid = true;
}
else if (tree.Text == "CLASS_CALL_NODE" && tree.ChildCount == 2)
{
if (tree.GetChild(1).Text == "FIELDS_CALL_NODE")
{
invalid = true;
}
}
}
if (invalid)
{
if (tree.Token.TokenIndex == -1)
{
throw new ParsingException("Only assignment, call, if, while, local variable declaration, new object creation and object method call can be used as a statement", expression.Start as IToken);
}
else
{
throw new ParsingException("Only assignment, call, if, while, local variable declaration, new object creation and object method call can be used as a statement", tree.Token);
}
}
return;
}
public static void IsStateAValidOneForBlock(ParserRuleReturnScope<IToken> statement, CommonTree tree)
{
if (tree != null && !SymbolList.Contains(tree.Text))
{
if (tree.Token.TokenIndex == -1)
{
throw new ParsingException(Resources.Only_a_sequential_program_or_C__method_calls_can_be_associated_with_an_event_, statement.Start as IToken);
}
else
{
throw new ParsingException(Resources.Only_a_sequential_program_or_C__method_calls_can_be_associated_with_an_event_, tree.Token);
}
}
return;
}
