Is the `?` symbol overloaded?

[a12l]

If you add ? attribute-name after an attribute set it returns either true or false depending on whether the attribute set contains a key with the given attribute name[0]. But if you add ? value after an attribute key you define a default value for the key[1].

Is the ? symbol overloaded, and its meaning change between contexts; or does it have an abstract definition that make it behave this way?

Hope I’ve mad my question clear!

[dramforever]

Yes it is overloaded as in the same symbol is used for two things.

@a12l

But if you add ? value after an attribute key

I want to clarify that this only works in the function parameter, so the two uses only appear in different places, therefore this is correct:

@a12l

its meaning change between contexts

[Ericson2314]

I sometimes with the one in expressions was ??, as most bool-returning operators are two characters.

[a12l]

@Ericson2314

I sometimes with the one in expressions was ?? , as most bool-returning operators are two characters.

What do you mean? I don’t understand what you wrote.

[ryantm]

He meant “I sometimes wish”.