“String” function

[tonton81]

the other day i was testing a String function, and without the return “” or return “whatever” in the function, teensy 3.6 i was testing it on froze and required a hard reboot

example:
something like this froze:

String foo() {
}

and this worked as expected

String foo() {
return “”;
}

not sure if its just me or not just throwing it out there

 

[defragster]

Looks like a compiler warning was issued and ignored?

warning: no return statement in function returning non-void

 

[PaulStoffregen]

Indeed, the compiler prints:

sketch_dec18a: In function 'String foo()':
sketch_dec18a:2: warning: no return statement in function returning non-void 
 }
 ^

 

[tonton81]

it was when i started addin it to the library, it did compile and run though at the beginning when i didnt yet put the returns in, its only when i actually ran the function it locked up... but it did compile for me from cpp file, weird

and yeah i usually fix those returns when needed to keep the compiler happy, but was just scripting away testing things

 

[evelynmurphy]

tonton, do you know the solution for this problem? because I have the similar one

 

[tonton81]

if your function handles returns, you have to add a return.
you could put at the end of the function this:

String foo() {
  return String "";
}

you should return all functions that return anyways, even if your not using the return values

 

[Michael Ward]

Hi,

Just in case it's not obvious, you don't need to do anything with the returned value if you don't want to. You can simply ignore it.

best,
Michael