Conditional (Ternary) causes Operand types are not compatible

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Posted on by Community Member Microsoft Employee

container conResult;
str segmentNameToCheck;

segmentValueToCheck = conPeek(conResult, 1) ? conPeek(conResult, 2) : "";

The string empty causes a Warning of "Operand types are not compatible with the operator. However, I have a string on one side of = and "" on the other and do not know how to prevent the warning from being thrown.

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XB 1,867 on at

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RE: Conditional (Ternary) causes Operand types are not compatible

Because values to return have to be of the same type.
Community Member Microsoft Employee on at

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RE: Conditional (Ternary) causes Operand types are not compatible

conPeek Function [AX 2012] states that The conPeek function automatically converts the peeked item into the expected return type. Strings can automatically be converted into integers and real numbers, and vice versa. https://msdn.microsoft.com/en-us/library/aa618978.aspx

The warning alludes to the "" being the issue. The function gets a Boolean from position 1 and a string from position 2 of the container. If false, then use an empty string. I thus get the warning.

This gives no warning

segmentValueToCheck = "";
if (conPeek(conResult, 1))
{
segmentValueToCheck = conPeek(conResult, 2);
}

Why does conditional (ternary) cause the warning?
Martin Dráb 230,503 Most Valuable Professional on at

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RE: Conditional (Ternary) causes Operand types are not compatible with the operator when using a string empty in X++.

Put your conPeek() results to variables. You'll likely find that one of them doesn't have the type you expect.