void PushOperator(TTEOperator op)
{
// while (_operators.Peek().Precedence > op.Precedence)
while (TTEOperator.Compare(_operators.Peek(), op))
{
PopOperator();
}
_operators.Push(op);
}
bool MatchUnary(out TTEOperator op)
{
if (Match("!"))
{
op = TTEOperator.Not;
}
else
{
op = null;
return(false);
}
return(true);
}
public static bool Compare(TTEOperator op1, TTEOperator op2)
{
if ((op1 == Ternary || op1 == RhsTernary) && (op2 == Ternary || op2 == RhsTernary))
{
return(op1 == RhsTernary && op2 == RhsTernary);
}
if (op1 == Sentinel || op2 == Sentinel)
{
return(false);
}
return(op1.Precedence > op2.Precedence);
}
bool LegacyOperator(out ITTEExpression expr)
{
TTEOperator op = null;
if (MatchAll(true, Kw("Add"), "("))
{
op = TTEOperator.Add;
}
else if (MatchAll(true, Kw("Subtract"), "("))
{
op = TTEOperator.Subtract;
}
else if (MatchAll(true, Kw("Multiply"), "("))
{
op = TTEOperator.Multiply;
}
else if (MatchAll(true, Kw("Divide"), "("))
{
op = TTEOperator.Divide;
}
else if (MatchAll(true, Kw("Modulo"), "("))
{
op = TTEOperator.Modulo;
}
else if (MatchAll(true, Kw("Raise To Power"), "("))
{
op = TTEOperator.Power;
}
else if (MatchAll(true, Kw("And"), "("))
{
op = TTEOperator.And;
}
else if (MatchAll(true, Kw("Or"), "("))
{
op = TTEOperator.Or;
}
else if (MatchAll(true, Kw("Compare"), "("))
{
ContainExpression(out ITTEExpression compareLeft);
Match(",");
if (Match("=="))
{
op = TTEOperator.Equal;
}
else if (Match("!="))
{
op = TTEOperator.NotEqual;
}
else if (Match(">="))
{
op = TTEOperator.GreaterThanOrEqual;
}
else if (Match("<="))
{
op = TTEOperator.LessThanOrEqual;
}
else if (Match(">"))
{
op = TTEOperator.GreaterThan;
}
else if (Match("<"))
{
op = TTEOperator.LessThan;
}
Match(",");
ContainExpression(out ITTEExpression compareRight);
Match(")");
expr = new BinaryOperatorExpression(compareLeft, compareRight, op);
return(true);
}
else if (MatchAll(true, Kw("If-Then-Else"), "("))
{
ContainExpression(out ITTEExpression condition);
Match(",");
ContainExpression(out ITTEExpression consequent);
Match(",");
ContainExpression(out ITTEExpression alternative);
Match(")");
expr = new TernaryExpression(condition, consequent, alternative);
return(true);
}
if (op == null)
{
expr = null;
return(false);
}
ContainExpression(out ITTEExpression left);
Match(",");
ContainExpression(out ITTEExpression right);
Match(")");
expr = new BinaryOperatorExpression(left, right, op);
return(true);
}
// Operators
bool MatchOperator(out TTEOperator op)
{
// Make sure we do not match modify operators.
// +=, -=, ect.
bool isModify = false;
Lookahead(() => {
isModify = Match("-=") || Match("+=") || Match("%=") || Match("/=") || Match("*=") || Match("^=");
return(false);
});
// If we do, set op to null then return false.
if (isModify)
{
op = null;
return(false);
}
if (Match("&&"))
{
op = TTEOperator.And;
}
else if (Match("||"))
{
op = TTEOperator.Or;
}
else if (Match("-"))
{
op = TTEOperator.Subtract;
}
else if (Match("+"))
{
op = TTEOperator.Add;
}
else if (Match("%"))
{
op = TTEOperator.Modulo;
}
else if (Match("/"))
{
op = TTEOperator.Divide;
}
else if (Match("*"))
{
op = TTEOperator.Multiply;
}
else if (Match("^"))
{
op = TTEOperator.Power;
}
else if (Match("=="))
{
op = TTEOperator.Equal;
}
else if (Match("!="))
{
op = TTEOperator.NotEqual;
}
else if (Match(">="))
{
op = TTEOperator.GreaterThanOrEqual;
}
else if (Match("<="))
{
op = TTEOperator.LessThanOrEqual;
}
else if (Match(">"))
{
op = TTEOperator.GreaterThan;
}
else if (Match("<"))
{
op = TTEOperator.LessThan;
}
else if (Match("?"))
{
op = TTEOperator.Ternary;
}
else if (Match(":"))
{
op = TTEOperator.RhsTernary;
}
else
{
op = null;
return(false);
}
return(true);
}
public BinaryOperatorExpression(ITTEExpression left, ITTEExpression right, TTEOperator op)
{
Left = left;
Right = right;
Operator = op;
}
// Operators
bool MatchOperator(out TTEOperator op)
{
if (Match("&&"))
{
op = TTEOperator.And;
}
else if (Match("||"))
{
op = TTEOperator.Or;
}
else if (Match("-"))
{
op = TTEOperator.Subtract;
}
else if (Match("+"))
{
op = TTEOperator.Add;
}
else if (Match("%"))
{
op = TTEOperator.Modulo;
}
else if (Match("/"))
{
op = TTEOperator.Divide;
}
else if (Match("*"))
{
op = TTEOperator.Multiply;
}
else if (Match("^"))
{
op = TTEOperator.Power;
}
else if (Match("=="))
{
op = TTEOperator.Equal;
}
else if (Match("!="))
{
op = TTEOperator.NotEqual;
}
else if (Match(">="))
{
op = TTEOperator.GreaterThanOrEqual;
}
else if (Match("<="))
{
op = TTEOperator.LessThanOrEqual;
}
else if (Match(">"))
{
op = TTEOperator.GreaterThan;
}
else if (Match("<"))
{
op = TTEOperator.LessThan;
}
else if (Match("?"))
{
op = TTEOperator.Ternary;
}
else if (Match(":"))
{
op = TTEOperator.RhsTernary;
}
else
{
op = null;
return(false);
}
return(true);
}