How edit clang-format to allow whitespace padding?

Development Tools IDE 2.x
1

Example from the title:

I have this declaration:

int8_t SW_ROW[24] = {1, 1, 1, 1, 0, 0, 0, 0, 5, 5, 5, 5,
                     20, 20, 20, 20, 19, 19, 19, 19, 18, 18, 18, 18};

and for better readability, I want to add spaces to look like this:

int8_t SW_ROW[24] = { 1,  1,  1,  1,  0,  0,  0,  0,  5,  5,  5,  5,
                     20, 20, 20, 20, 19, 19, 19, 19, 18, 18, 18, 18};

I have not found an entry in clang-format to allow this. Can it be done?

2

The whitespace in this example have no effect on compiling. If you format, you probably will loose the whitespace.

3

Yes, it compiles fine, but I like to use the Cntrl+T Auto Format in the IDE to neaten up other things, and when I do that, it removes the whitespace/padding, like you say. That's what I want to avoid. I want the whitespace/padding to survive a Cntrl+T formatting.

I'm looking for something to edit in the clang-format file to allow whitespace. I have not found it yet.

I did find this, which makes a list of declarations a bit neater:

#AlignConsecutiveDeclarations: None
AlignConsecutiveDeclarations: true

4

I use 3-digit decimal with byte types (0 - 255) and prefix/pad with zeroes for visual alignment.

5

Hmm, I think that the compiler will complain with certain values or you get the wrong ones :smiley:

010 is not 10 for the compiler and 008 will result in a warning or error.

Leading zeroes indicate octal numbers.

6

Yes, there may have been compile warnings. I was making RGB colors and wanted the code to be easy-on-my-eyes to spot offending values.

7

Yes, I just tried padding with leading zeroes, and it took the values as OCTAL, and the compiler complained. But it wasn't so obvious at first...

I thought I had it, because I was using uint8_t and as long as the digits were < 8, the compiler assumed I knew what I was doing. In my first trial, I had only entered things like 000, 001, 010, 123, so the compiler was fine. Good thing I later tried on 080 before I got too excited! :slight_smile:

I really like to line up numbers like this, makes it so much easier to spot a typo, or other issue, and makes it far clearer in some cases. Ought to be a way. Other than keeping a plain text version, and copy back/forth?

8

OK, a solution of sorts, more of a band-aid, but it gets the job done...

Adding these comments turns the formatting off/on. So do Cntrl-T for the basics, then comment out the formatting and add the leading zeroes, or any spaces you want.

// clang-format off

int8_t SW_ROW[24] = {  1,  1,  1,  1,  0,  0,  0,  0,  5,  5,  5,  5,
                      20, 20, 20, 20, 19, 19, 19, 19, 18, 18, 18, 18};

// clang-format on

edit/add: I found this solution here:

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9

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