Clang-format not following rule `UseTab: Always`

[kunalchandan]

Issue

First I would like to thank the authors of the tool. I have enjoyed using it and hope to continue using it.
If there is something I am doing incorrectly I would gladly be corrected.

I believe Clang-format is indenting with spaces when I want to only use tab indents.

Sample

#define FG_CYN	"\x1B[36m"
#define FG_WHT	"\x1B[37m"

#define RST	"\x1B[0m"

void fun_function(int param_a) {
	printf("I have a really long string here that exceeds my column limit");
	printf("I sometimes like" FG_CYN " to break with inserted defines" RST);
}

My minimal .clang-format

BasedOnStyle: GNU
Language: Cpp
ColumnLimit: 80

UseTab: Always
IndentWidth: 8
TabWidth: 8
ContinuationIndentWidth: 8

BreakStringLiterals: true

Output

#define FG_CYN	"\x1B[36m"
#define FG_WHT	"\x1B[37m"

#define RST	"\x1B[0m"

void fun_function(int param_a)
{
	printf("I have a really long string I's extra super long here that "
	       "exceeds my column limit");
	printf("I sometimes like colors and I insert them like this " FG_CYN
	       " to break with inserted defines" RST);
}

more clearly or in another way

void fun_function(int param_a)
{
\tprintf("I have a really long string I's extra super long here that "
\t\s\s\s\s\s\s\s\s"exceeds my column limit");
\tprintf("I sometimes like colors and I insert them like this " FG_CYN
\t\s\s\s\s\s\s\s\s" to break with inserted defines" RST);
}

I don't want to see \s or space characters used to indent, and only ever want to see \t or tabs as indents.

Thanks in advance :)

Other supporting system information

Using vscode.

$ clang-format --version
clang-format version 20.1.4

clang-format installed with python venv

Ubuntu 22.04

Python 3.10

[llvmbot]

@llvm/issue-subscribers-clang-format

Author: Kunal Chandan (kunalchandan)

# Issue

First I would like to thank the authors of the tool. I have enjoyed using it and hope to continue using it.
If there is something I am doing incorrectly I would gladly be corrected.

I believe Clang-format is indenting with spaces when I want to only use tab indents.

Sample

#define FG_CYN	"\x1B[36m"
#define FG_WHT	"\x1B[37m"

#define RST	"\x1B[0m"

void fun_function(int param_a) {
	printf("I have a really long string here that exceeds my column limit");
	printf("I sometimes like" FG_CYN " to break with inserted defines" RST);
}

My minimal .clang-format

BasedOnStyle: GNU
Language: Cpp
ColumnLimit: 80

UseTab: Always
IndentWidth: 8
TabWidth: 8
ContinuationIndentWidth: 8

BreakStringLiterals: true

Output

#define FG_CYN	"\x1B[36m"
#define FG_WHT	"\x1B[37m"

#define RST	"\x1B[0m"

void fun_function(int param_a)
{
	printf("I have a really long string I's extra super long here that "
	       "exceeds my column limit");
	printf("I sometimes like colors and I insert them like this " FG_CYN
	       " to break with inserted defines" RST);
}

more clearly or in another way

void fun_function(int param_a)
{
\tprintf("I have a really long string I's extra super long here that "
\t\s\s\s\s\s\s\s\s"exceeds my column limit");
\tprintf("I sometimes like colors and I insert them like this " FG_CYN
\t\s\s\s\s\s\s\s\s" to break with inserted defines" RST);
}

I don't want to see \s or space characters used to indent, and only ever want to see \t or tabs as indents.

Thanks in advance :)

Other supporting system information

Using vscode.

$ clang-format --version
clang-format version 20.1.4

clang-format installed with python venv

Ubuntu 22.04

Python 3.10