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