private void SetMethod(ExpressionCompiler ec, MethodInfo methodInfo)
{
_pos++;
while (_pos < _input.Length && _input[_pos] == ' ')
{
_pos++;
}
if (_pos >= _input.Length || _input[_pos] != '(')
{
throw new ParenthesisException(_input, _pos, Resources.Opening);
}
_pos++;
SetExpression(ec, Expression.Call(methodInfo, Parse(true)));
}
private Expression Parse(bool bParentheses)
{
ExpressionCompiler ec = new ExpressionCompiler();
while (_pos < _input.Length)
{
switch (_input[_pos])
{
case ' ':
break;
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
case '.':
HandleNumber(ec);
break;
case 'x':
case 'X':
SetExpression(ec, _params.X);
break;
case 'y':
case 'Y':
SetExpression(ec, _params.Y);
break;
case 'z':
case 'Z':
SetExpression(ec, _params.Z);
break;
case 't':
case 'T':
SetExpression(ec, _params.T);
break;
case '+':
SetOperator(ec, new OperatorAdd());
break;
case '-':
HandleMinus(ec);
break;
case '/':
SetOperator(ec, new OperatorDivide());
break;
case '*':
SetOperator(ec, new OperatorMultiply());
break;
case '^':
SetOperator(ec, new OperatorPower());
break;
case '(':
_pos++;
SetExpression(ec, Parse(true));
break;
case ')':
if (!bParentheses)
{
throw new ParenthesisException(_input, _pos, Resources.Opening);
}
return(GetResultExpression(ec));
case 'a':
case 'A':
if (ConsumeWord("abs"))
{
SetMethod(ec, Functions.Abs);
}
else
{
throw new SyntaxException(_input, _pos);
}
break;
case 'c':
case 'C':
if (ConsumeWord("cos"))
{
SetMethod(ec, Functions.Cos);
}
else
{
throw new SyntaxException(_input, _pos);
}
break;
case 'p':
case 'P':
if (ConsumeWord("pi"))
{
SetExpression(ec, Expression.Constant(Math.PI));
}
else
{
throw new SyntaxException(_input, _pos);
}
break;
case 's':
case 'S':
if (ConsumeWord("sin"))
{
SetMethod(ec, Functions.Sin);
}
else if (ConsumeWord("sqrt"))
{
SetMethod(ec, Functions.Sqrt);
}
else
{
throw new SyntaxException(_input, _pos);
}
break;
default:
throw new UnknownTokenException(_input, _pos);
}
_pos++;
}
if (bParentheses)
{
throw new ParenthesisException(_input, _pos, Resources.Closing);
}
return(GetResultExpression(ec));
}