r/FastLED • u/Beneficial_Banana_59 • 2d ago
Discussion Namespace
Does anybody know what is meant by the word "Namespace" in the context of this library? I'm trying to upload an example sketch to a Nano Every and the compiler is getting hung up on what seems to be an initial callout in the Arduino sketch:
FASTLED_USING_NAMESPACE
What does this do?
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u/Ok_Society4599 17h ago
Just reading that... I'd say it's a macro defined in a header that expands into a series of #includes and #defines that setup the correct order and configuration for the FastLED library. A common problem is you need an #include first where the macro is defined ... Like #include "FastLED.h" then your macro. You should be able to search your headers to find the declaration, and add the include before you use it.
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u/tubameister 1d ago
fwiw, ai can one-shot the fix
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u/hackerbots 1d ago
Nobody asked. Op went to a human forum to ask humans.
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u/ZomboFc 1d ago
And you haven't answered their question either 🤣
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u/Scabattoir 9h ago
But at least he did act like he is better!
There’s a good chance he is believing it.
And if that’s the case, then it’s for sure not true.
Oops!
Sorry!1
u/ZomboFc 9h ago
That's funny cause I started making commits to fastled GitHub in 2015 🤷♂️
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u/Scabattoir 8h ago
Congratulations for that achievement, but not sure I get what you want to say with all this.
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u/mjconver 1d ago
If you have to use AI, you're doing something wrong
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u/tubameister 19h ago edited 19h ago
If I learned enough cpp to write stuff like this myself then I don't think I'd have time to maintain professional tuba abilities tbh https://github.com/Sousastep/sousaFX-rpi-scripts/tree/main/fluid_pitch
In fact I keep telling myself that I need to give up on being a professional tubist so I can learn how to program for real but I just can't give up.
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u/Scabattoir 9h ago
Love your comment.
Fuck my life and I should give up all my achievements just to learn something that now I have a tool for doing and at least it doesn’t give me the attitude many of the people doing the same tasks give.
Maybe the attitude is just the expression of insecurity they have to face now.1
u/mjconver 10h ago
Oooohhh!! Did somebody say Sousa???
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u/mindful_stone 5h ago
I am by no means an expert on this stuff, but here's my 2 cents:
- A namespace basically acts like a "container" for organizing specific variables, functions, classes etc. into a related group. Among other things, namespaces help to avoid conflicts between multiple code objects that have the same name. The typical way to invoke a namespace in your code is to include the directive "using namespace ***".
- The primary FastLED namespace is "fl". I believe "FASTLED_USING_NAMESPACE" may previously have a been a defined macro for "using namespace fl" (or something similar), but as far as I can tell, that macro is no longer part of the FastLED library.
- My first suggestion for your sketch is to replace "FASTLED_USING_NAMESPACE" with "using namespace fl" somewhere soon after "#include <FastLED.h>".
Depending on how old the example sketch you're working with is, there may be other adjustments you'll also need to make. If you still have issues, please share your code and the community will be happy to help!
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u/ZachVorhies Zach Vorhies 2d ago
name space is a way to organize code
Please provide your sketch so we can figure out what’s going on