private Executable ParseFor(TokenStream tokens, TopLevelConstruct owner)
{
Token forToken = tokens.PopExpected(this.parser.Keywords.FOR);
tokens.PopExpected("(");
if (!tokens.HasMore)
{
tokens.ThrowEofException();
}
if (this.parser.IsValidIdentifier(tokens.PeekValue()) && tokens.PeekValue(1) == ":")
{
Token iteratorToken = tokens.Pop();
if (this.parser.IsReservedKeyword(iteratorToken.Value))
{
throw new ParserException(iteratorToken, "Cannot use this name for an iterator.");
}
tokens.PopExpected(":");
Expression iterationExpression = this.parser.ExpressionParser.Parse(tokens, owner);
tokens.PopExpected(")");
IList <Executable> body = ParserContext.ParseBlock(parser, tokens, false, owner);
return(new ForEachLoop(forToken, iteratorToken, iterationExpression, body, owner));
}
else
{
List <Executable> init = new List <Executable>();
while (!tokens.PopIfPresent(";"))
{
if (init.Count > 0)
{
tokens.PopExpected(",");
}
init.Add(this.Parse(tokens, true, false, owner));
}
Expression condition = null;
if (!tokens.PopIfPresent(";"))
{
condition = this.parser.ExpressionParser.Parse(tokens, owner);
tokens.PopExpected(";");
}
List <Executable> step = new List <Executable>();
while (!tokens.PopIfPresent(")"))
{
if (step.Count > 0)
{
tokens.PopExpected(",");
}
step.Add(this.Parse(tokens, true, false, owner));
}
IList <Executable> body = ParserContext.ParseBlock(parser, tokens, false, owner);
return(new ForLoop(forToken, init, condition, step, body, owner));
}
}
private Expression ParseMultiplication(TokenStream tokens, Node owner)
{
Expression expr = ParseNegate(tokens, owner);
string next = tokens.PeekValue();
while (MULTIPLICATION_OPS.Contains(next))
{
Token op = tokens.Pop();
Expression right = ParseNegate(tokens, owner);
expr = new OpChain(expr, op, right, owner);
next = tokens.PeekValue();
}
return(expr);
}
private Expression ParseAddition(TokenStream tokens, TopLevelConstruct owner)
{
Expression expr = ParseMultiplication(tokens, owner);
string next = tokens.PeekValue();
while (ADDITION_OPS.Contains(next))
{
Token op = tokens.Pop();
Expression right = ParseMultiplication(tokens, owner);
expr = new BinaryOpChain(expr, op, right, owner);
next = tokens.PeekValue();
}
return(expr);
}
public static ModifierCollection Parse(TokenStream tokens)
{
if (!tokens.HasMore || !LOOKUP.ContainsKey(tokens.PeekValue()))
{
return(EMPTY);
}
List <Token> modifierTokens = new List <Token>();
while (LOOKUP.ContainsKey(tokens.PeekValue()))
{
modifierTokens.Add(tokens.Pop());
}
return(new ModifierCollection(modifierTokens));
}
private Expression ParseEqualityComparison(TokenStream tokens, Node owner)
{
Expression expr = ParseInequalityComparison(tokens, owner);
string next = tokens.PeekValue();
if (next == "==" || next == "!=")
{
Token equalityToken = tokens.Pop();
Expression rightExpr = ParseEqualityComparison(tokens, owner);
return(new OpChain(expr, equalityToken, rightExpr, owner));
}
return(expr);
}
private Expression ParseBitwiseOp(TokenStream tokens, Node owner)
{
Expression expr = ParseEqualityComparison(tokens, owner);
string next = tokens.PeekValue();
if (next == "|" || next == "&" || next == "^")
{
Token bitwiseToken = tokens.Pop();
Expression rightExpr = ParseBitwiseOp(tokens, owner);
return(new OpChain(expr, bitwiseToken, rightExpr, owner));
}
return(expr);
}
private Expression ParseBooleanCombination(TokenStream tokens, Node owner)
{
Expression expr = ParseBitwiseOp(tokens, owner);
string next = tokens.PeekValue();
if (next == "||" || next == "&&")
{
List <Expression> expressions = new List <Expression>()
{
expr
};
List <Token> ops = new List <Token>();
while (next == "||" || next == "&&")
{
ops.Add(tokens.Pop());
expressions.Add(ParseBitwiseOp(tokens, owner));
next = tokens.PeekValue();
}
return(new BooleanCombination(expressions, ops, owner));
}
return(expr);
}
private Expression ParseExponents(TokenStream tokens, Node owner)
{
Expression expr = ParseIncrement(tokens, owner);
string next = tokens.PeekValue();
if (next == "**")
{
Token op = tokens.Pop();
Expression right = ParseNegate(tokens, owner);
expr = new OpChain(expr, op, right, owner);
}
return(expr);
}
private Expression ParseBitShift(TokenStream tokens, Node owner)
{
Expression expr = ParseAddition(tokens, owner);
string next = tokens.PeekValue();
if (next == "<<" || next == ">>")
{
Token opToken = tokens.Pop();
Expression rightExpr = ParseBitShift(tokens, owner);
return(new OpChain(expr, opToken, rightExpr, owner));
}
return(expr);
}
private Expression ParseInequalityComparison(TokenStream tokens, Node owner)
{
Expression expr = ParseBitShift(tokens, owner);
string next = tokens.PeekValue();
if (next == "<" || next == ">" || next == "<=" || next == ">=")
{
// Don't allow chaining of inqeualities
Token opToken = tokens.Pop();
Expression rightExpr = ParseBitShift(tokens, owner);
return(new OpChain(expr, opToken, rightExpr, owner));
}
return(expr);
}
private Expression ParseNegate(TokenStream tokens, Node owner)
{
string next = tokens.PeekValue();
if (NEGATE_OPS.Contains(next))
{
Token negateOp = tokens.Pop();
Expression root = ParseNegate(tokens, owner);
if (negateOp.Value == "!")
{
return(new BooleanNot(negateOp, root, owner));
}
if (negateOp.Value == "-")
{
return(new NegativeSign(negateOp, root, owner));
}
throw new Exception("This shouldn't happen.");
}
return(ParseExponents(tokens, owner));
}
public TopLevelConstruct ParseTopLevel(
TokenStream tokens,
TopLevelConstruct owner,
FileScope fileScope)
{
AnnotationCollection annotations = annotations = this.parser.AnnotationParser.ParseAnnotations(tokens);
string value = tokens.PeekValue();
// The returns are inline, so you'll have to refactor or put the check inside each parse call.
// Or maybe a try/finally.
TODO.CheckForUnusedAnnotations();
Token staticToken = null;
Token finalToken = null;
while (value == this.parser.Keywords.STATIC || value == this.parser.Keywords.FINAL)
{
if (value == this.parser.Keywords.STATIC && staticToken == null)
{
staticToken = tokens.Pop();
value = tokens.PeekValue();
}
if (value == this.parser.Keywords.FINAL && finalToken == null)
{
finalToken = tokens.Pop();
value = tokens.PeekValue();
}
}
if (staticToken != null || finalToken != null)
{
if (value != this.parser.Keywords.CLASS)
{
if (staticToken != null)
{
throw ParserException.ThrowException(this.parser.CurrentLocale, ErrorMessages.ONLY_CLASSES_METHODS_FIELDS_MAY_BE_STATIC, staticToken);
}
else
{
throw ParserException.ThrowException(this.parser.CurrentLocale, ErrorMessages.ONLY_CLASSES_MAY_BE_FINAL, finalToken);
}
}
if (staticToken != null && finalToken != null)
{
throw ParserException.ThrowException(this.parser.CurrentLocale, ErrorMessages.CLASSES_CANNOT_BE_STATIC_AND_FINAL_SIMULTANEOUSLY, staticToken);
}
}
if (value == parser.Keywords.IMPORT)
{
Token importToken = tokens.PopExpected(parser.Keywords.IMPORT);
List <string> importPathBuilder = new List <string>();
while (!tokens.PopIfPresent(";"))
{
if (importPathBuilder.Count > 0)
{
tokens.PopExpected(".");
}
Token pathToken = tokens.Pop();
parser.VerifyIdentifier(pathToken);
importPathBuilder.Add(pathToken.Value);
}
string importPath = string.Join(".", importPathBuilder);
return(new ImportStatement(importToken, importPath, parser.CurrentLibrary, fileScope));
}
if (value == this.parser.Keywords.NAMESPACE)
{
return(this.ParseNamespace(tokens, owner, fileScope, annotations));
}
if (value == this.parser.Keywords.CONST)
{
return(this.ParseConst(tokens, owner, fileScope, annotations));
}
if (value == this.parser.Keywords.FUNCTION)
{
return(this.ParseFunction(tokens, owner, fileScope, annotations));
}
if (value == this.parser.Keywords.CLASS)
{
return(this.ParseClassDefinition(tokens, owner, staticToken, finalToken, fileScope, annotations));
}
if (value == this.parser.Keywords.ENUM)
{
return(this.ParseEnumDefinition(tokens, owner, fileScope, annotations));
}
if (value == this.parser.Keywords.CONSTRUCTOR)
{
return(this.ParseConstructor(tokens, owner, annotations));
}
Token token = tokens.Peek();
throw ParserException.ThrowException(
this.parser.CurrentLocale,
ErrorMessages.UNEXPECTED_TOKEN_NO_SPECIFIC_EXPECTATIONS,
token,
token.Value);
}
public Executable Parse(
TokenStream tokens,
bool simpleOnly,
bool semicolonPresent,
TopLevelConstruct owner)
{
string value = tokens.PeekValue();
if (!simpleOnly)
{
if (value == this.parser.Keywords.FUNCTION || value == this.parser.Keywords.CLASS)
{
throw new ParserException(
tokens.Peek(),
(value == this.parser.Keywords.FUNCTION ? "Function" : "Class") +
" definition cannot be nested in another construct.");
}
if (value == parser.Keywords.IMPORT)
{
throw this.parser.GenerateParseError(ErrorMessages.ALL_IMPORTS_MUST_OCCUR_AT_BEGINNING_OF_FILE, tokens.Peek());
}
if (value == this.parser.Keywords.ENUM)
{
throw new ParserException(tokens.Peek(), "Enums can only be defined from the root of a file and cannot be nested inside functions/loops/etc.");
}
if (value == this.parser.Keywords.NAMESPACE)
{
throw new ParserException(tokens.Peek(), "Namespace declarations cannot be nested in other constructs.");
}
if (value == this.parser.Keywords.CONST)
{
throw new ParserException(tokens.Peek(), "Constant declarations cannot be nested in other constructs.");
}
if (value == this.parser.Keywords.FOR)
{
return(this.ParseFor(tokens, owner));
}
if (value == this.parser.Keywords.WHILE)
{
return(this.ParseWhile(tokens, owner));
}
if (value == this.parser.Keywords.DO)
{
return(this.ParseDoWhile(tokens, owner));
}
if (value == this.parser.Keywords.SWITCH)
{
return(this.ParseSwitch(tokens, owner));
}
if (value == this.parser.Keywords.IF)
{
return(this.ParseIf(tokens, owner));
}
if (value == this.parser.Keywords.TRY)
{
return(this.ParseTry(tokens, owner));
}
if (value == this.parser.Keywords.RETURN)
{
return(this.ParseReturn(tokens, owner));
}
if (value == this.parser.Keywords.BREAK)
{
return(this.ParseBreak(tokens, owner));
}
if (value == this.parser.Keywords.CONTINUE)
{
return(this.ParseContinue(tokens, owner));
}
if (value == this.parser.Keywords.THROW)
{
return(this.ParseThrow(tokens, owner));
}
}
Expression expr = this.parser.ExpressionParser.Parse(tokens, owner);
value = tokens.PeekValue();
if (ASSIGNMENT_OPS.Contains(value))
{
Token assignment = tokens.Pop();
Expression assignmentValue = this.parser.ExpressionParser.Parse(tokens, owner);
if (semicolonPresent)
{
tokens.PopExpected(";");
}
return(new Assignment(expr, assignment, assignment.Value, assignmentValue, owner));
}
if (semicolonPresent)
{
tokens.PopExpected(";");
}
return(new ExpressionAsExecutable(expr, owner));
}
private Expression ParseEntityWithoutSuffixChain(TokenStream tokens, TopLevelConstruct owner)
{
string next = tokens.PeekValue();
if (next == null)
{
tokens.ThrowEofException();
}
if (next == this.parser.Keywords.NULL)
{
return(new NullConstant(tokens.Pop(), owner));
}
if (next == this.parser.Keywords.TRUE)
{
return(new BooleanConstant(tokens.Pop(), true, owner));
}
if (next == this.parser.Keywords.FALSE)
{
return(new BooleanConstant(tokens.Pop(), false, owner));
}
Token peekToken = tokens.Peek();
if (next.StartsWith("'"))
{
return(new StringConstant(tokens.Pop(), StringConstant.ParseOutRawValue(peekToken), owner));
}
if (next.StartsWith("\""))
{
return(new StringConstant(tokens.Pop(), StringConstant.ParseOutRawValue(peekToken), owner));
}
if (next == this.parser.Keywords.NEW)
{
return(this.ParseInstantiate(tokens, owner));
}
char firstChar = next[0];
if (VARIABLE_STARTER.Contains(firstChar))
{
Token varToken = tokens.Pop();
return(new Variable(varToken, varToken.Value, owner));
}
if (firstChar == '[')
{
Token bracketToken = tokens.PopExpected("[");
List <Expression> elements = new List <Expression>();
bool previousHasCommaOrFirst = true;
while (!tokens.PopIfPresent("]"))
{
if (!previousHasCommaOrFirst)
{
tokens.PopExpected("]"); // throws appropriate error
}
elements.Add(Parse(tokens, owner));
previousHasCommaOrFirst = tokens.PopIfPresent(",");
}
return(new ListDefinition(bracketToken, elements, owner));
}
if (firstChar == '{')
{
Token braceToken = tokens.PopExpected("{");
List <Expression> keys = new List <Expression>();
List <Expression> values = new List <Expression>();
bool previousHasCommaOrFirst = true;
while (!tokens.PopIfPresent("}"))
{
if (!previousHasCommaOrFirst)
{
tokens.PopExpected("}"); // throws appropriate error
}
keys.Add(Parse(tokens, owner));
tokens.PopExpected(":");
values.Add(Parse(tokens, owner));
previousHasCommaOrFirst = tokens.PopIfPresent(",");
}
return(new DictionaryDefinition(braceToken, keys, values, owner));
}
if (next.Length > 2 && next.Substring(0, 2) == "0x")
{
Token intToken = tokens.Pop();
int intValue = IntegerConstant.ParseIntConstant(intToken, intToken.Value);
return(new IntegerConstant(intToken, intValue, owner));
}
if (ParserContext.IsInteger(next))
{
Token numberToken = tokens.Pop();
string numberValue = numberToken.Value;
if (tokens.IsNext("."))
{
Token decimalToken = tokens.Pop();
if (decimalToken.HasWhitespacePrefix)
{
throw new ParserException(decimalToken, "Decimals cannot have whitespace before them.");
}
Token afterDecimal = tokens.Pop();
if (afterDecimal.HasWhitespacePrefix)
{
throw new ParserException(afterDecimal, "Cannot have whitespace after the decimal.");
}
if (!ParserContext.IsInteger(afterDecimal.Value))
{
throw new ParserException(afterDecimal, "Decimal must be followed by an integer.");
}
numberValue += "." + afterDecimal.Value;
double floatValue = FloatConstant.ParseValue(numberToken, numberValue);
return(new FloatConstant(numberToken, floatValue, owner));
}
int intValue = IntegerConstant.ParseIntConstant(numberToken, numberToken.Value);
return(new IntegerConstant(numberToken, intValue, owner));
}
if (tokens.IsNext("."))
{
Token dotToken = tokens.PopExpected(".");
string numberValue = "0.";
Token postDecimal = tokens.Pop();
if (postDecimal.HasWhitespacePrefix || !ParserContext.IsInteger(postDecimal.Value))
{
throw new ParserException(dotToken, "Unexpected dot.");
}
numberValue += postDecimal.Value;
double floatValue;
if (Util.ParseDouble(numberValue, out floatValue))
{
return(new FloatConstant(dotToken, floatValue, owner));
}
throw new ParserException(dotToken, "Invalid float literal.");
}
throw new ParserException(tokens.Peek(), "Encountered unexpected token: '" + tokens.PeekValue() + "'");
}
public TopLevelConstruct ParseTopLevel(
TokenStream tokens,
TopLevelConstruct owner,
FileScope fileScope)
{
AnnotationCollection annotations = annotations = this.parser.AnnotationParser.ParseAnnotations(tokens);
string value = tokens.PeekValue();
// The returns are inline, so you'll have to refactor or put the check inside each parse call.
// Or maybe a try/finally.
TODO.CheckForUnusedAnnotations();
Token staticToken = null;
Token finalToken = null;
while (value == this.parser.Keywords.STATIC || value == this.parser.Keywords.FINAL)
{
if (value == this.parser.Keywords.STATIC && staticToken == null)
{
staticToken = tokens.Pop();
value = tokens.PeekValue();
}
if (value == this.parser.Keywords.FINAL && finalToken == null)
{
finalToken = tokens.Pop();
value = tokens.PeekValue();
}
}
if (staticToken != null || finalToken != null)
{
if (value != this.parser.Keywords.CLASS)
{
if (staticToken != null)
{
throw new ParserException(staticToken, "Only classes, methods, and fields may be marked as static");
}
else
{
throw new ParserException(finalToken, "Only classes may be marked as final.");
}
}
if (staticToken != null && finalToken != null)
{
throw new ParserException(staticToken, "Classes cannot be both static and final.");
}
}
if (value == parser.Keywords.IMPORT)
{
Token importToken = tokens.PopExpected(parser.Keywords.IMPORT);
List <string> importPathBuilder = new List <string>();
while (!tokens.PopIfPresent(";"))
{
if (importPathBuilder.Count > 0)
{
tokens.PopExpected(".");
}
Token pathToken = tokens.Pop();
parser.VerifyIdentifier(pathToken);
importPathBuilder.Add(pathToken.Value);
}
string importPath = string.Join(".", importPathBuilder);
return(new ImportStatement(importToken, importPath, parser.CurrentLibrary, fileScope));
}
if (value == this.parser.Keywords.NAMESPACE)
{
return(this.ParseNamespace(tokens, owner, fileScope, annotations));
}
if (value == this.parser.Keywords.CONST)
{
return(this.ParseConst(tokens, owner, fileScope, annotations));
}
if (value == this.parser.Keywords.FUNCTION)
{
return(this.ParseFunction(tokens, owner, fileScope, annotations));
}
if (value == this.parser.Keywords.CLASS)
{
return(this.ParseClassDefinition(tokens, owner, staticToken, finalToken, fileScope, annotations));
}
if (value == this.parser.Keywords.ENUM)
{
return(this.ParseEnumDefinition(tokens, owner, fileScope, annotations));
}
if (value == this.parser.Keywords.CONSTRUCTOR)
{
return(this.ParseConstructor(tokens, owner, annotations));
}
throw new ParserException(tokens.Peek(), "Unrecognized token.");
}
internal virtual TopLevelEntity Parse(
TokenStream tokens,
TopLevelEntity owner,
FileScope fileScope)
{
AnnotationCollection annotations = this.parser.AnnotationParser.ParseAnnotations(tokens);
ModifierCollection modifiers = ModifierCollection.Parse(tokens);
string value = tokens.PeekValue();
if (value == this.parser.Keywords.IMPORT)
{
throw this.parser.GenerateParseError(
ErrorMessages.ALL_IMPORTS_MUST_OCCUR_AT_BEGINNING_OF_FILE,
tokens.Pop());
}
// The returns are inline, so you'll have to refactor or put the check inside each parse call.
// Or maybe a try/finally.
TODO.CheckForUnusedAnnotations();
if (value == this.parser.Keywords.NAMESPACE)
{
return(this.ParseNamespace(tokens, owner, fileScope, annotations));
}
if (value == this.parser.Keywords.CONST)
{
return(this.ParseConst(tokens, owner, fileScope, modifiers, annotations));
}
if (value == this.parser.Keywords.FUNCTION)
{
return(this.ParseFunction(tokens, owner, fileScope, modifiers, annotations));
}
if (value == this.parser.Keywords.CLASS)
{
return(this.ParseClassDefinition(tokens, owner, fileScope, modifiers, annotations));
}
if (value == this.parser.Keywords.ENUM)
{
return(this.ParseEnumDefinition(tokens, owner, fileScope, modifiers, annotations));
}
if (value == this.parser.Keywords.CONSTRUCTOR && owner is ClassDefinition)
{
return(this.ParseConstructor(tokens, (ClassDefinition)owner, modifiers, annotations));
}
FunctionDefinition nullableFunctionDef = this.MaybeParseFunctionDefinition(tokens, owner, fileScope, annotations, modifiers);
if (nullableFunctionDef != null)
{
return(nullableFunctionDef);
}
Token token = tokens.Peek();
throw ParserException.ThrowException(
this.parser.CurrentLocale,
ErrorMessages.UNEXPECTED_TOKEN_NO_SPECIFIC_EXPECTATIONS,
token,
token.Value);
}
private Expression ParseEntityWithoutSuffixChain(TokenStream tokens, Node owner)
{
tokens.EnsureNotEof();
Token nextToken = tokens.Peek();
string next = nextToken.Value;
if (next == this.parser.Keywords.NULL)
{
return(new NullConstant(tokens.Pop(), owner));
}
if (next == this.parser.Keywords.TRUE)
{
return(new BooleanConstant(tokens.Pop(), true, owner));
}
if (next == this.parser.Keywords.FALSE)
{
return(new BooleanConstant(tokens.Pop(), false, owner));
}
if (next == this.parser.Keywords.THIS)
{
return(new ThisKeyword(tokens.Pop(), owner));
}
if (next == this.parser.Keywords.BASE)
{
return(new BaseKeyword(tokens.Pop(), owner));
}
Token peekToken = tokens.Peek();
if (next.StartsWith("'"))
{
return(new StringConstant(tokens.Pop(), StringConstant.ParseOutRawValue(peekToken), owner));
}
if (next.StartsWith("\""))
{
return(new StringConstant(tokens.Pop(), StringConstant.ParseOutRawValue(peekToken), owner));
}
if (next == "@") // Raw strings (no escape sequences, a backslash is a literal backslash)
{
Token atToken = tokens.Pop();
Token stringToken = tokens.Pop();
char stringTokenChar = stringToken.Value[0];
if (stringTokenChar != '"' && stringTokenChar != '\'')
{
throw new ParserException(atToken, "Unexpected token: '@'");
}
string stringValue = stringToken.Value.Substring(1, stringToken.Value.Length - 2);
return(new StringConstant(atToken, stringValue, owner));
}
if (next == this.parser.Keywords.NEW)
{
return(this.ParseInstantiate(tokens, owner));
}
char firstChar = next[0];
if (nextToken.Type == TokenType.WORD)
{
Token varToken = tokens.Pop();
if (tokens.IsNext("=>"))
{
return(this.ParseLambda(
tokens,
varToken,
new AType[] { AType.Any() },
new Token[] { varToken },
owner));
}
else
{
return(new Variable(varToken, varToken.Value, owner));
}
}
if (firstChar == '[' && nextToken.File.CompilationScope.IsCrayon)
{
Token bracketToken = tokens.PopExpected("[");
List <Expression> elements = new List <Expression>();
bool previousHasCommaOrFirst = true;
while (!tokens.PopIfPresent("]"))
{
if (!previousHasCommaOrFirst)
{
tokens.PopExpected("]"); // throws appropriate error
}
elements.Add(Parse(tokens, owner));
previousHasCommaOrFirst = tokens.PopIfPresent(",");
}
return(new ListDefinition(bracketToken, elements, AType.Any(), owner, false, null));
}
if (firstChar == '{' && nextToken.File.CompilationScope.IsCrayon)
{
Token braceToken = tokens.PopExpected("{");
List <Expression> keys = new List <Expression>();
List <Expression> values = new List <Expression>();
bool previousHasCommaOrFirst = true;
while (!tokens.PopIfPresent("}"))
{
if (!previousHasCommaOrFirst)
{
tokens.PopExpected("}"); // throws appropriate error
}
keys.Add(Parse(tokens, owner));
tokens.PopExpected(":");
values.Add(Parse(tokens, owner));
previousHasCommaOrFirst = tokens.PopIfPresent(",");
}
return(new DictionaryDefinition(braceToken, AType.Any(), AType.Any(), keys, values, owner));
}
if (nextToken.Type == TokenType.NUMBER)
{
if (next.Contains("."))
{
double floatValue;
if (double.TryParse(next, out floatValue))
{
return(new FloatConstant(tokens.Pop(), floatValue, owner));
}
throw new ParserException(nextToken, "Invalid float literal.");
}
return(new IntegerConstant(
tokens.Pop(),
IntegerConstant.ParseIntConstant(nextToken, next),
owner));
}
throw new ParserException(tokens.Peek(), "Encountered unexpected token: '" + tokens.PeekValue() + "'");
}