// - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
private static IExpression ParseExpExpression()
{
if (Check(FirstUnaryExp))
{
var exp = ParseUnaryExpression();
if (Check(new TokenSet(TokenType.Exponent)))
{
var opType = _currentToken.Type;
Eat(opType);
if (!Check(FirstUnaryExp))
{
throw new InvalidSyntaxException("Expected an expression after ^ operator");
}
var right = ParseUnaryExpression();
switch (opType)
{
case TokenType.Exponent:
exp = new ExpExpression(exp, right);
break;
default:
throw new UnexpectedBehaviorException("Expected exponent, got: " + opType);
}
}
return(exp);
}
throw new InvalidSyntaxException("Invalid expression");
}
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
private static IExpression ParseExpExpression()
{
if (Check(FirstUnaryExp))
{
var exp = ParseUnaryExpression();
if (Check(new TokenSet(TokenType.Exponent)))
{
var opType = _currentToken.Type;
Eat(opType);
if (!Check(FirstUnaryExp))
{
throw new InvalidSyntaxException("Expected an expression after ^ operator");
}
var right = ParseUnaryExpression();
switch (opType)
{
case TokenType.Exponent:
exp = new ExpExpression(exp, right);
break;
default:
throw new UnexpectedBehaviorException("Expected exponent, got: " + opType);
}
}
return exp;
}
throw new InvalidSyntaxException("Invalid expression");
}