private EcmaStatment GetReturn(EcmaTokenizer token)
{
EcmaStatment statment = new EcmaStatment(EcmaStatmentType.Return);
if (token.Current().LineStart == token.Next().LineStart)
{
if (token.Current().IsNot(TokenType.Punctor, ";") && token.Current().IsNot(TokenType.EOS))
{
statment.Expresion = Expresion(token);
if (token.Lines[token.Lines.Count - 2] == token.Current().LineStart)
{
if (token.Current().IsNot(TokenType.Punctor, ";") && token.Current().IsNot(TokenType.EOS))
{
token.Current().Excepect(TokenType.Punctor, ";");
}
token.Next();
}
}
else
{
token.Next();
}
}
return(statment);
}
private ExpresionData PrimaryExpresion(EcmaTokenizer token)
{
TokenBuffer buf = token.Current();
token.Next();
if (buf.Is(TokenType.Keyword, "this"))
{
return(new ExpresionData(ExpresionType.This));
}
if (buf.Is(TokenType.Number))
{
ExpresionData n = new ExpresionData(ExpresionType.Number);
n.Sign = buf.Context;
return(n);
}
if (buf.Is(TokenType.Null))
{
return(new ExpresionData(ExpresionType.Null));
}
if (buf.Is(TokenType.Bool))
{
ExpresionData b = new ExpresionData(ExpresionType.Bool);
b.Sign = buf.Context;
return(b);
}
if (buf.Is(TokenType.Identify))
{
ExpresionData identify = new ExpresionData(ExpresionType.Identify);
identify.Name = buf.Context;
return(identify);
}
if (buf.Is(TokenType.String))
{
ExpresionData str = new ExpresionData(ExpresionType.String);
str.Sign = buf.Context;
return(str);
}
if (buf.Is(TokenType.Punctor, "("))
{
ExpresionData p = Expresion(token);
token.Current().Excepect(TokenType.Punctor, ")");
token.Next();
return(p);
}
throw new EcmaRuntimeException("Unknown token detected " + buf.Context + "(" + buf.Type.ToString() + ") on line " + buf.LineStart);
}
private EcmaStatment GetWhile(EcmaTokenizer token)
{
token.Next().Excepect(TokenType.Punctor, "(");
token.Next();
EcmaStatment statment = new EcmaStatment(EcmaStatmentType.While);
statment.Expresion = Expresion(token);
token.Current().Excepect(TokenType.Punctor, ")");
token.Next();
statment.Statment = GetStatment(token);
return(statment);
}
private ExpresionData VariableDeclarationList(EcmaTokenizer token)
{
List <ExpresionData> list = new List <ExpresionData>();
ExpresionData exp;
token.Current().Excepect(TokenType.Identify);
exp = new ExpresionData(ExpresionType.Assign);
ExpresionData identify = new ExpresionData(ExpresionType.Identify);
identify.Name = token.Current().Context;
exp.Left = identify;
exp.Sign = "=";
if (token.Next().Is(TokenType.Punctor, "="))
{
token.Next();
exp.Right = AssignmentExpression(token);
}
else
{
exp.Right = new ExpresionData(ExpresionType.Null);
}
list.Add(exp);
while (token.Current().Is(TokenType.Punctor, ","))
{
exp = new ExpresionData(ExpresionType.Assign);
token.Next().Excepect(TokenType.Identify);
identify = new ExpresionData(ExpresionType.Identify);
identify.Name = token.Current().Context;
exp.Left = identify;
exp.Sign = "=";
if (token.Next().Is(TokenType.Punctor, "="))
{
token.Next();
exp.Right = AssignmentExpression(token);
}
else
{
exp.Right = new ExpresionData(ExpresionType.Null);
}
list.Add(exp);
}
ExpresionData varList = new ExpresionData(ExpresionType.VarList);
varList.Multi = list;
return(varList);
}
private ExpresionData ConditionalExpression(EcmaTokenizer token)
{
ExpresionData exp = LogicalORExpression(token);
if (token.Current().Is(TokenType.Punctor, "?"))
{
token.Next();
ExpresionData buf = new ExpresionData(ExpresionType.Conditional);
buf.Test = exp;
buf.Left = AssignmentExpression(token);
token.Current().Excepect(TokenType.Punctor, ":");
token.Next();
buf.Right = AssignmentExpression(token);
return(buf);
}
return(exp);
}
private ExpresionData[] Arguments(EcmaTokenizer token)
{
List <ExpresionData> args = new List <ExpresionData>();
if (token.Next().IsNot(TokenType.Punctor, ")"))
{
args.Add(AssignmentExpression(token));
while (token.Current().Is(TokenType.Punctor, ","))
{
token.Next();
args.Add(AssignmentExpression(token));
}
}
token.Current().Excepect(TokenType.Punctor, ")");
token.Next();
return(args.ToArray());
}
private EcmaStatment GetIf(EcmaTokenizer token)
{
token.Next().Excepect(TokenType.Punctor, "(");
token.Next();
EcmaStatment statment = new EcmaStatment(EcmaStatmentType.If);
statment.Expresion = Expresion(token);
token.Current().Excepect(TokenType.Punctor, ")");
token.Next();
statment.Statment = GetStatment(token);
if (token.Current().Is(TokenType.Keyword, "else"))
{
token.Next();
statment.Else = GetStatment(token);
}
return(statment);
}
private ExpresionData NewExpression(EcmaTokenizer token)
{
ExpresionData exp = new ExpresionData(ExpresionType.New);
token.Next();
exp.Left = PrimaryExpresion(token);
token.Current().Excepect(TokenType.Punctor, "(");
exp.Arg = Arguments(token);
return(exp);
}
private ExpresionData LeftHandSideExpression(EcmaTokenizer token)
{
if (token.Current().Is(TokenType.Keyword, "new"))
{
return(NewExpression(token));
}
ExpresionData exp = PrimaryExpresion(token);
ExpresionData buf = null;
while (token.Current().Is(TokenType.Punctor, new string[] { ".", "(", "[" }))
{
switch (token.Current().Context)
{
case ".":
token.Next().Excepect(TokenType.Identify);
buf = new ExpresionData(ExpresionType.ObjGet);
buf.Left = exp;
buf.Sign = token.Current().Context;
token.Next();
exp = buf;
break;
case "[":
token.Next();
buf = new ExpresionData(ExpresionType.ItemGet);
buf.Left = exp;
buf.Right = Expresion(token);
token.Current().Excepect(TokenType.Punctor, "]");
token.Next();
break;
case "(":
buf = new ExpresionData(ExpresionType.Call);
buf.Left = exp;
buf.Arg = Arguments(token);
break;
}
exp = buf;
}
return(exp);
}
private EcmaStatment GetFor(EcmaTokenizer token)
{
token.Next().Excepect(TokenType.Punctor, "(");
ExpresionData first = new ExpresionData(ExpresionType.Null);
if (token.Next().IsNot(TokenType.Punctor, ";"))
{
if (token.Current().Is(TokenType.Keyword, "var"))
{
token.Next();
first = VariableDeclarationList(token);
}
else
{
first = Expresion(token);
}
}
EcmaStatment current = null;
if (token.Current().Is(TokenType.Keyword, "in"))
{
token.Next();
current = new EcmaStatment(EcmaStatmentType.ForIn);
current.Expresion = first;
current.Second = Expresion(token);
}
else
{
token.Current().Excepect(TokenType.Punctor, ";");
token.Next();
current = new EcmaStatment(EcmaStatmentType.For);
current.Expresion = first;
if (token.Current().IsNot(TokenType.Punctor, ";"))
{
current.Second = Expresion(token);
token.Current().Excepect(TokenType.Punctor, ";");
}
else
{
current.Second = new ExpresionData(ExpresionType.Null);
}
if (token.Next().IsNot(TokenType.Punctor, ")"))
{
current.Tree = Expresion(token);
}
else
{
current.Tree = new ExpresionData(ExpresionType.Null);
}
}
token.Current().Excepect(TokenType.Punctor, ")");
token.Next();
current.Statment = GetStatment(token);
return(current);
}
private EcmaStatment GetBlock(EcmaTokenizer token)
{
List <EcmaStatment> elem = new List <EcmaStatment>();
if (token.Next().IsNot(TokenType.Punctor, "}"))
{
elem.Add(GetStatment(token));
while (token.Current().IsNot(TokenType.Punctor, "}"))
{
elem.Add(GetStatment(token));
}
}
token.Current().Excepect(TokenType.Punctor, "}");
token.Next();
EcmaStatment statment = new EcmaStatment(EcmaStatmentType.Block);
statment.Statments = elem;
return(statment);
}
private EcmaStatment GetFunctionDec(EcmaTokenizer token)
{
token.Next().Excepect(TokenType.Identify);
EcmaStatment statment = new EcmaStatment(EcmaStatmentType.FunctionDec);
statment.Name = token.Current().Context;
token.Next().Excepect(TokenType.Punctor, "(");
List <String> args = new List <String>();
if (token.Next().IsNot(TokenType.Punctor, ")"))
{
token.Current().Excepect(TokenType.Identify);
args.Add(token.Current().Context);
while (token.Next().Is(TokenType.Punctor, ","))
{
token.Next().Excepect(TokenType.Identify);
args.Add(token.Current().Context);
}
}
token.Current().Excepect(TokenType.Punctor, ")");
token.Next().Excepect(TokenType.Punctor, "{");
statment.Args = args.ToArray();
statment.Statment = GetBlock(token);
return(statment);
}
private ExpresionData UnaryExpression(EcmaTokenizer token)
{
if (token.Current().Is(TokenType.Keyword, new string[] { "delete", "void", "typeof" }) || token.Current().Is(TokenType.Punctor, new string[] { "++", "--", "+", "-", "~", "!" }))
{
ExpresionData buf = new ExpresionData(ExpresionType.Unary);
buf.Sign = token.Current().Context;
token.Next();
buf.Left = UnaryExpression(token);
return(buf);
}
return(PostfixExpression(token));
}
private ExpresionData PostfixExpression(EcmaTokenizer token)
{
ExpresionData exp = LeftHandSideExpression(token);
if (token.Current().Is(TokenType.Punctor, new string[] { "--", "++" }))
{
ExpresionData buf = new ExpresionData(ExpresionType.Unary);
buf.Sign = token.Current().Context;
buf.Left = exp;
token.Next();
return(buf);
}
return(exp);
}
private ExpresionData BitwiseANDExpression(EcmaTokenizer token)
{
ExpresionData exp = EqualityExpression(token);
if (token.Current().Is(TokenType.Punctor, "&"))
{
token.Next();
ExpresionData buf = new ExpresionData(ExpresionType.BAND);
buf.Left = exp;
buf.Right = BitwiseANDExpression(token);
return(buf);
}
return(exp);
}
private ExpresionData LogicalORExpression(EcmaTokenizer token)
{
ExpresionData exp = LogicalANDExpression(token);
if (token.Current().Is(TokenType.Punctor, "||"))
{
token.Next();
ExpresionData buf = new ExpresionData(ExpresionType.Or);
buf.Left = exp;
buf.Right = LogicalORExpression(token);
return(buf);
}
return(exp);
}
private ExpresionData EqualityExpression(EcmaTokenizer token)
{
ExpresionData exp = RelationalExpression(token);
if (token.Current().Is(TokenType.Punctor, new string[] { "==", "!=" }))
{
ExpresionData buf = new ExpresionData(ExpresionType.Equlity);
buf.Left = exp;
buf.Sign = token.Current().Context;
token.Next();
buf.Right = RelationalExpression(token);
return(buf);
}
return(exp);
}
private ExpresionData MultiplicativeExpression(EcmaTokenizer token)
{
ExpresionData exp = UnaryExpression(token);
if (token.Current().Is(TokenType.Punctor, new string[] { "*", "/", "%" }))
{
ExpresionData buf = new ExpresionData(ExpresionType.Multiplicative);
buf.Sign = token.Current().Context;
token.Next();
buf.Left = exp;
buf.Right = MultiplicativeExpression(token);
return(buf);
}
return(exp);
}
private ExpresionData RelationalExpression(EcmaTokenizer token)
{
ExpresionData exp = ShiftExpression(token);
if (token.Current().Is(TokenType.Punctor, RelationalOperator))
{
ExpresionData buf = new ExpresionData(ExpresionType.Relational);
buf.Left = exp;
buf.Sign = token.Current().Context;
token.Next();
buf.Right = ShiftExpression(token);
return(buf);
}
return(exp);
}
private ExpresionData AssignmentExpression(EcmaTokenizer token)
{
ExpresionData exp = ConditionalExpression(token);
if (token.Current().Is(TokenType.Punctor, AssignOperator))
{
ExpresionData buf = new ExpresionData(ExpresionType.Assign);
buf.Left = exp;
buf.Sign = token.Current().Context;
token.Next();
buf.Right = AssignmentExpression(token);
return(buf);
}
return(exp);
}
private ExpresionData Expresion(EcmaTokenizer token)
{
ExpresionData expresion = AssignmentExpression(token);
if (token.Current().Is(TokenType.Punctor, ","))
{
ExpresionData buffer = new ExpresionData(ExpresionType.MultiExpresion);
buffer.Multi = new List <ExpresionData>();
buffer.Multi.Add(expresion);
while (token.Current().Is(TokenType.Punctor, ","))
{
token.Next();
buffer.Multi.Add(AssignmentExpression(token));
}
return(buffer);
}
return(expresion);
}
private EcmaStatment GetVar(EcmaTokenizer token)
{
Dictionary <string, ExpresionData> list = new Dictionary <string, ExpresionData>();
token.Next().Excepect(TokenType.Identify);
string identify = token.Current().Context;
if (token.Next().Is(TokenType.Punctor, "="))
{
token.Next();
list.Add(identify, Expresion(token));
}
else
{
list.Add(identify, null);
}
while (token.Current().Is(TokenType.Punctor, ","))
{
token.Next().Excepect(TokenType.Identify);
identify = token.Current().Context;
if (token.Next().Is(TokenType.Punctor, "="))
{
token.Next();
list.Add(identify, Expresion(token));
}
else
{
list.Add(identify, null);
}
}
token.Current().Excepect(TokenType.Punctor, ";");
token.Next();
EcmaStatment statment = new EcmaStatment(EcmaStatmentType.Var);
statment.VarList = list;
return(statment);
}
private EcmaStatment GetContinue(EcmaTokenizer token)
{
token.Next().Excepect(TokenType.Punctor, ";");
token.Next();
return(new EcmaStatment(EcmaStatmentType.Continue));
}