private Expression factor()
{
Expression retVal;
Expression thisVal;
Token id;
bool includeThis;
switch (lookAhead.TokenType)
{
case '(':
accept(); retVal = expr(); match(')');
break;
case TokenType.TOKEN_ID:
int line = l.currentLine;
Expression lVal = leftVal(out thisVal, out includeThis);
if (lookAhead.TokenType == '(' || includeThis) // function call
{
match('('); List <Expression> argss = args(includeThis, thisVal); match(')');
retVal = new exp_functioncall(m, line, argss, lVal);
}
else
{
retVal = lVal;
}
break;
case TokenType.TOKEN_NUMBER:
id = match(TokenType.TOKEN_NUMBER);
return(new exp_number(m, l.currentLine, id.numToken));
case '[':
accept();
retVal = newTable();
match(']');
break;
//return new exp_new_table(m, l.currentLine);
case '!':
accept();
return(new exp_not(m, l.currentLine, factor()));
case '-':
accept();
return(new exp_arith(m, l.currentLine, new exp_number(m, l.currentLine, 0.0), factor(), OpCode.ARITH_SUB));
case TokenType.TOKEN_STRING:
id = match(TokenType.TOKEN_STRING);
return(new exp_string(m, l.currentLine, m.parser_checkStringMap(id.strToken, true)));
default:
throw new CompileException(l.currentLine, "Unexpected Token " + TokenType.getTokenTypeString(lookAhead.TokenType));
}
return(retVal);
}
private Expression factor()
{
Expression retVal;
int local;
Token id;
switch (lookAhead.TokenType)
{
case '(':
accept(); retVal = expr(); match(')');
break;
case TokenType.TOKEN_ID:
id = match(TokenType.TOKEN_ID);
local = m.GetLocalIDByName(id.strToken);
if (lookAhead.TokenType == '(') //function call
{
int line = l.currentLine;
accept(); List <Expression> argss = args(); match(')');
if (local != -1)
{
retVal = new exp_functioncall(m, line, argss, local, true);
}
else
{
retVal = new exp_functioncall(m, line, argss, m.parser_checkStringMap(id.strToken, true), false);
}
}
else
{
if (local != -1)
{
retVal = new exp_local_var_right(m, l.currentLine, local);
}
else
{
retVal = new exp_var_right(m, l.currentLine, m.parser_checkStringMap(id.strToken, true));
}
}
break;
case TokenType.TOKEN_IN:
accept(); match('(');
retVal = new exp_in(m, l.currentLine, expr());
match(')');
break;
case TokenType.TOKEN_NUMBER:
id = match(TokenType.TOKEN_NUMBER);
return(new exp_number(m, l.currentLine, id.numToken));
case '!':
accept();
return(new exp_not(m, l.currentLine, factor()));
case '-':
accept();
return(new exp_arith(m, l.currentLine, new exp_number(m, l.currentLine, 0.0), factor(), OpCode.ARITH_SUB));
case TokenType.TOKEN_STRING:
id = match(TokenType.TOKEN_STRING);
return(new exp_string(m, l.currentLine, m.parser_checkStringMap(id.strToken, true)));
default:
throw new CompileException(l.currentLine, "Unexpected Token " + TokenType.getTokenTypeString(lookAhead.TokenType));
}
return(retVal);
}
