private void NextToken()
{
_currentToken = ReadToken();
if (_currentToken == null)
_currentToken = TokenAst.Create(LRParser.Eof, _context, new SourceLocation(0, _currentLine - 1, 0), string.Empty);
}
public ScriptForEachStatement(AstNodeArgs args)
: base(args)
{
_name = (TokenAst)ChildNodes[1];
_expr = (ScriptExpr)ChildNodes[3];
_statement = (ScriptStatement)ChildNodes[4];
}
public ScriptForEachStatement(AstNodeArgs args)
: base(args)
{
_name = (TokenAst)ChildNodes[1];
_expr = (ScriptExpr)ChildNodes[3];
_statement = (ScriptStatement)ChildNodes[4];
}
public void Prepare(CompilerContext context, ISourceStream source)
{
_context = context;
_source = source;
_currentToken = null;
_bufferedTokens.Clear();
ResetSource();
}
public IEnumerable<TokenAst> BeginScan()
{
while (true)
{
_currentToken = ReadToken();
yield return _currentToken;
if (_currentToken.Terminal == LRParser.Eof)
yield break;
}
}
public ScriptConstExpr(AstNodeArgs args)
: base(args)
{
TokenAst constant = (TokenAst)ChildNodes[0];
Value = constant.Value;
if (constant.IsKeyword)
{
if (Value.Equals("true"))
{
Value = true;
}
else if (Value.Equals("false"))
{
Value = false;
}
else if (Value.Equals("null"))
{
Value = null;
}
}
}
private ParserActionType GetActionTypeForOperation(TokenAst current)
{
ITerminal thisTerm = current.Terminal;
for (int i = _stack.Count - 2; i >= 0; i--)
{
if (_stack[i].Node == null) continue;
IGrammarTerm term = _stack[i].Node.Term;
if (!term.IsSet(TermOptions.IsOperator)) continue;
ITerminal prevTerm = term as ITerminal;
if (prevTerm.Precedence == thisTerm.Precedence)
return thisTerm.Associativity == Associativity.Left ? ParserActionType.Reduce : ParserActionType.Shift;
ParserActionType result = prevTerm.Precedence > thisTerm.Precedence ? ParserActionType.Reduce : ParserActionType.Shift;
return result;
}
return ParserActionType.Shift;
}
