public static Expression Parse(ref string[] program)
{
Expression ret;
string token1 = ParseUtils.PeekToken(program);
TokenType type1 = WooScript.GetTokenType(token1);
if (token1.Equals("(", StringComparison.Ordinal))
{
ret = new Brackets();
ret.Parse(ref program);
}
else if (type1 == TokenType.floatNum)
{
ret = new FloatNumber();
ret.Parse(ref program);
}
else if (type1 == TokenType.floatVar ||
type1 == TokenType.vecVar)
{
ret = new Variable();
ret.Parse(ref program);
}
else if (type1 == TokenType.vecFunction)
{
ret = new VecFunctionExpr();
ret.Parse(ref program);
}
else if (type1 == TokenType.floatFunction)
{
ret = new FloatFunctionExpr();
ret.Parse(ref program);
}
else if (type1 == TokenType.Op)
{
//deal with -8 type numbers
ret = new FloatNumber();
ret.Parse(ref program);
}
else
{
throw new ParseException("Unrecognised expression \"" + token1 + "\"");
}
/* if (type1 == TokenType.floatFunction)
* {
* ret = new FloatFunction();
* ret.Parse(ref program);
* }
*/
string token2 = ParseUtils.PeekToken(program);
TokenType type2 = WooScript.GetTokenType(token2);
if (type2 == TokenType.Op)
{
FloatOperation flop = new FloatOperation();
flop.Parse(ref program);
flop._Argument1 = ret;
Expression arg2 = ExpressionBuilder.Parse(ref program);
flop._Argument2 = arg2;
// operator precedence check
if (arg2 is FloatOperation)
{
if ((arg2 as FloatOperation).GetPrecedence() < flop.GetPrecedence())
{
// shuffle args
flop._Argument2 = (arg2 as FloatOperation)._Argument1;
(arg2 as FloatOperation)._Argument1 = flop;
flop = (arg2 as FloatOperation);
}
}
if (flop._Argument1.GetExpressionType() != flop._Argument2.GetExpressionType())
{
throw new ParseException("Mismatch argument types on operation");
}
ret = flop;
}
return(ret);
}
public static Expression Parse(ref string[] program)
{
Expression ret;
string token1 = ParseUtils.PeekToken(program);
TokenType type1 = WooScript.GetTokenType(token1);
if (token1.Equals("(", StringComparison.Ordinal))
{
ret = new Brackets();
ret.Parse(ref program);
}
else if (type1 == TokenType.floatNum)
{
ret = new FloatNumber();
ret.Parse(ref program);
}
else if (type1 == TokenType.floatVar
|| type1 == TokenType.vecVar)
{
ret = new Variable();
ret.Parse(ref program);
}
else if (type1 == TokenType.vecFunction)
{
ret = new VecFunctionExpr();
ret.Parse(ref program);
}
else if (type1 == TokenType.floatFunction)
{
ret = new FloatFunctionExpr();
ret.Parse(ref program);
}
else if (type1 == TokenType.Op)
{
//deal with -8 type numbers
ret = new FloatNumber();
ret.Parse(ref program);
}
else
throw new ParseException("Unrecognised expression \"" + token1 + "\"");
/* if (type1 == TokenType.floatFunction)
{
ret = new FloatFunction();
ret.Parse(ref program);
}
*/
string token2 = ParseUtils.PeekToken(program);
TokenType type2 = WooScript.GetTokenType(token2);
if (type2 == TokenType.Op)
{
FloatOperation flop = new FloatOperation();
flop.Parse(ref program);
flop._Argument1 = ret;
Expression arg2 = ExpressionBuilder.Parse(ref program);
flop._Argument2 = arg2;
// operator precedence check
if (arg2 is FloatOperation)
{
if ((arg2 as FloatOperation).GetPrecedence() < flop.GetPrecedence())
{
// shuffle args
flop._Argument2 = (arg2 as FloatOperation)._Argument1;
(arg2 as FloatOperation)._Argument1 = flop;
flop = (arg2 as FloatOperation);
}
}
if (flop._Argument1.GetExpressionType() != flop._Argument2.GetExpressionType())
throw new ParseException("Mismatch argument types on operation");
ret = flop;
}
return ret;
}
